Neodymium as a Fuel

 

South Magnetic Group Co are manufacturer (supplier) of arc Segment Magnets, we also provide you with Magnet related products such as strong rare earth permanent magnets, Sintered super neodymium iron boron (Ndfeb) Magnet, Hard ceramic (ferrite) Magnets, Bonded Magnet, Samarium Cobalt (SmCo), DC motor Magnet, AlNiCo Magnet, magnetic (assembly, sweeper, lifer), And else industrial (disc / block / cylinder / ring / sphere) magnets for your choice.
1.MAGNETS R& D
Motor ARC MAGNETS for automobile industry is our important product, according to the automobile features, we research and design a series magnet to meet the demand, among the magnet for starter motor and window-rolling motors are the leading magnet in China.

11 29

Rare earth Magnets
Rare earth Magnets
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Rare earth Magnets
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neodymium magnets
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Rae earth Magnets
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strong magnets
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Rare earth Magnets
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Rare earth Magnets
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neodymium magnets
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Rare earth Magnets
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neodymium magnets
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2.USE
automobile air compressor motor are based on Y30H-2 materials grade and applicable for tire pressure monitoring system. Magnets for electric tool
automobile power seat motors are based on Y30-3 materials grade and applicable for high-grade car power seat regulator
automobile fan motors are applicable for 30W, 50W, 80W based on Y30H-1, Y30H-2, and Y33H materials grade. Main features are low current and stable rotation speed
automobile windshield wipe motors are applicable for various wipe motors based on Y30H-1, Y30H-2, and Y30H-3 materials grade. Main features are many kind of specifications, large force, and low current.
3.NdFeB MAGNETS Standard
NdFeB
remanence(Br)

11 29

strong magnets
strong magnets
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Coercivity(HcB)
Intrinsic Coercivity(HcJ)
BHmax
T

 

Grade
KGs
T
KOe
kA/m
kOe
kA/m
mGOe
kJ/m3
oC
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11.7-12.1
1.17-1.21
=10.9
=868
=12
=955
33-36
263-287>
80

 

N38
12.1-12.5
1.21-1.25
=11.3
= 899
=12
=955
36-39
287-310
80

 

N40
12.5-12.8
1.25-1.28
=11.6
=923
=12
=955
38-41
302-326
80

 

N42
12.8-13.2
1.28-1.32
=11.6
=923
=12
=955
40-43
318-342
80

 

N45
13.2-13.8
1.32-1.38
=11.0
= 876
=12
=955
43-46
332-366
80

 

N48
13.8-14.2
1.38-1.42
=10.5
= 835
=12
=876
46-49
366-396
80

 

N50
13.8-14.5
1.38-1.45
=10.5
=835
=12
=876
47-51
374-406
80

 

N52
14.4-14.8
1.44-1.48
=10.5
=836
=11
=876
49-53
390-422
80

 

N35M
11.7-12.1
1.17-1.21
=10.9
=868
=14
=1114
33-36
263-287
100

 

N38M
12.1-12.5
1.21-1.25
=11.3
=899
=14
=1114
36-39
287-310
100

 

N40M
12.5-12.8
1.25-1.28
=11.6
=923
=14
=1114
38-41
302-326
100

 

N42M
12.8-13.2
1.28-1.32
=12.1
=963
=14
=1114
40-43
318-342
100

 

N45M
13.2-13.8
1.32-1.38
=12.5
=995
=14
=1114
43-46
342-366
100

 

N48M
13.7-14.2
1.37-1.42
=12.8
=1018
=14
=1114
45-469
358-390
100

 

N50M
14-14.5
1.4-1.45
=13.1
=1042
=11
=1114
47-51
374-406
80

 

N30H
10.8-11.3
1.08-1.13
=10.2
=812
=17
=1353
28-31
223-247
120

 

N33H
11.3-11.7
1.13-1.17
=10.6
=844
=17
=1353
31-33
247-263
120

 

N35H
11.7-12.1
1.17-1.21
=11.0
=876
=17
=1353
33-36
263-287
120

 

N38H
11.8-12.5
1.18-1.25
=11
=875
=17
=1114
47-51
374-406
80

 

N40H
12.5-12.8
1.25-1.28
=11.5
=915
=17
=1353
38-41
302-326
120

 

41H
12.5-13.2
1.25-1.32
=11.8
=939
=17
=1274
38-42
302-334
120

 

N42H
12.8-13.2
1.28-1.32
= 11.9
= 947
= 17
=1353
40-43
318-342
120

 

N44H
13-13.7
1.3-1.37
=12.1
=963
=16
=1247
41-45
326-356
120

 

N46H
13-13.7
1.3-1.37
=12.1
=963
=16
=1247
41-45
326-356
120

 

N48H
13.7-14.2
1.37-1.42
=12.7
=1011
=16
=1274
45-49
356-390
120

 

N30SH
10.8-11.3
1.08-1.13
= 10.0
= 796
= 20
=1592
28-31
223-247
150

 

N33SH
11.3-11.7
1.13-1.17
= 10.5
= 836
= 20
=1592
31-33
247-263
150

 

N35SH
11.7-12.1
1.17-1.21
= 11.0
= 876
= 20
=1592
33-36
263-287
150

 

N38SH
12.1-1.25
1.21-1.25
= 11.4
= 907
= 20
=1592
36-39
287-310
150

 

N40SH
12.5-12.8
1.25-1.28
= 11.6
= 923
= 20
=1989
38-41
302-326
150

 

N30UH
10.8-11.3
1.08-1.13
= 10.2
=812
=25
=1990
28-31
223-247
180

 

N33UH
11.3-11.7
1.13-1.17
= 10.5
= 836
= 25
=1990
31-33
247-263
180

 

N35UH
11.7-12.1
1.17-1.21
= 10.7
= 852
= 25
=1990
33-36
263-28
180

 

N38UH
12.3-13
1.23-1.3
=11.6
=915
=25
=1990
36-40
287-316
180

 

N40UH
12.6-13.2
1.26-1.32
=10.5
=839
=25
=1990
38-42
298-334
180

 

N28EH
10.4-10.8
1.04-1.08
=9.5
=756
=30
=2388
26-29
207-231
200

 

N30EH
10.9-11.7
1.09-1.17
=10.2
=812
=30
=2388
28-32
223-255
200

 

N33EH
11.4-12.2
1.14-1.22
=10.7
=851
=30
=2388
31-35
279-2274
200

 

N35EH
11.8-12.5
1.18-1.25
=11
=875
=30
=2388
31-35
279-2274
200

 

N38EH
12.2-13
1.22-1.3
=11.5
=915
=30
=2387
36-40
287-318
200

 

N28AH
10.4-11
1.04-1.1
=9.70
=772
=35
=2786
26-29
207-231
220

 

N30AH
10.8-11.7
1.08-1.17
=10.2
=812
=35
=2786
28-32
223-255
220

 

N33AH
11.4-12.2
1.14-1.22
=10.7
=851
=35
=2786
31-38
247-279
220

 

N35AH
11.7-12.5
1.17-1.25
=11.0
=876
=35
=2786
33-37
263-295
220

 

Total
45 STRONG SUPRT Neodymium Iron Boron (NdFeB) Magnets OF Parameters
top
4.Q:What is mean for Magnetized thru thickness?
A;We use the description “Magnetized thru thickness” to identify the locations of the poles on our block magnets. The thickness is always the last dimension listed for block magnets. If you take one of our block magnets and place it on a flat surface with the thickness dimension as the vertical dimension, the poles will be on the top and bottom of the magnet as it sits.
For example: Our BX082 blocks are 1″ x 1/2″ x 1/8″ thick. If you place one of the blocks so it is on a flat surface with 1/8″ as the vertical dimension, the poles will be on the top and bottom as the magnet sits. This means the poles are located in the middle of the 1″ x 1/2″ sides. Click here for Magnetization Directions Illustrated.
5.Standards of ferrite Parameters
Material
Br
HcB
HcJ
(BH) max

 

 

mT
KG
KA/m
KOe
KA/m
KOe
Kj/m3
MGOe

 

 

C1
230
2.3
148
1.86
258
3.5
8.36
1.05

 

 

C5
380
3.8
191
2.4
199
2.5
27
3.4

 

 

C7
340
3.4
258
3.23
318
4.00
21.9
2.75

 

 

C8A
385
3.85
235
2.95
242
3.05
27.8
3.5

 

 

C8B
420
4.2
232
2.913
236
2.96
32.8
4.12

 

 

C9
380
3.8
280
3.516
320
4.01
26.4
3.32

 

 

C10
400
4.0
288
3.617
280
3.51
30.4
3.82

 

 

C11
430
4.3
200
2.512
204
2.56
34.4
4.32

 

 

Total
8 grades of ceramic(ferrite) magnets
6.Q:What materials do magnets attract?
A;Ferromagnetic materials are strongly attracted by a magnetic force. The elements iron (Fe), nickel (Ni), and cobalt (Co) are the most commonly available elements. Steel is ferromagnetic because it is an alloy of iron and other metals.
7.Q:What is magnets can I use to block magnetic fields?
A;Magnetic fields cannot be blocked, only redirected. The only materials that will redirect magnetic fields are materials that are ferromagnetic (attracted to magnets), such as iron, steel (which contains iron), cobalt, and nickel. The degree of redirection is proportional to the permeability of the material. The most efficient shielding material is the 80 Nickel family, followed by the 50 Nickel family.
8.NEWS
Are you hunting a good ARC MAGNETS supplier? The site content the latest ARC MAGNET?knowledge and magnets industry information ARC MAGNETS are perfectly combined by high-tech and modern craft, we are OEM manufacturer, has a group of doctors and masters, as well as the technicians. we can provide the ARC MAGNETS as per the drawing, and also your OEM order is welcome. DO NOT hesitate!!. we would like to promote win-win cooperation with all the customers. We will give you a competitive price.
9.size ARC of MAGNETS
The size listed are only a portion of the products we carry; please contact us for the size you need.
Model
outside arc R
arc r
bow Gao H
chord W
axis high-L
thickness T

 

 

 

 

0701A
27.75
21.65
19.5
50
45
6.15

 

 

 

 

0701C
27.75
21.65
19.0
50
45
6.15

 

 

 

 

0701D
27.75
21.65
19.0
50
33.5
6.15

 

 

 

 

0702C
33
25.65
21
50.2
60
60

 

 

 

 

0702b
33
25.65
21
57
70
72

 

 

 

 

0702C
33
25.6
21
57
40
7.2

 

 

 

 

0703A
38.5
30.7
27
70
75
7.7

 

 

 

 

0703B
38.5
30.5
27
70
60
7.7

 

 

 

 

0704A
22.5
18
16.3
42
47
5.5

 

 

 

 

0704B
22.54
18
16.3
42
45
5.5

 

 

 

 

0704C
24
18
16
43
43.5
6

 

 

 

 

0705A
29
23.3
21
54
40
6.3

 

 

 

 

0705B
29
22.3
20
52
36
6.7

 

 

 

 

0705C
29
21.2
22
52
43.5
7.8

 

 

 

 

0705D
28.5
25.7
20
50
36.9
7.0

 

 

 

 

0705E
28.5
22.4
19
50
33.5
6.1

 

 

 

 

0706A
37
28.2
25
62
48
8.8

 

 

 

 

0706B
37
28.2
25
62
36
8.8

 

 

 

 

0707
35.5
28.5
24
62
50
6.9

 

 

 

 

0708A
28.9
23
21
53
40
5.75

 

 

 

 

0708B>
28.9
23
21
53
50
5.75

 

 

 

 

0709A
31.5
24.5
14
33
50
7.4

 

 

 

 

0709B>
31.5
24.1
14
33
46
7.3

 

 

 

 

0709C
31.5
24.1
13.5
33
45
7.3

 

 

 

 

0710
17.4
12.15
12.2
30.5
31.6
5.2

 

 

 

 

0711A
17.75
12.65
10.3
26.5
43
6.0

 

 

 

 

0711B
18
12.3
11.85
26
52
6.5

 

 

 

 

0712A
22.4
28
19
51
45
6.0

 

 

 

 

0712B
28
22.4
19>
51
33
5.6

 

 

 

 

0713A
32.5
25.1
21.5
57
41.7
8.1

 

 

 

 

0713C
33.75
31.75
27.75
67.5
38
8.0

 

 

 

 

0714D
36
27
24.5>
61
61
9

 

 

 

 

0715D
35.4
27
25.4
63
34.5
8.4

 

 

 

 

0716A
41
30.5
29.7
74.6
82
10.2

 

 

 

 

0717A
43
37.6
30
77.5
70
7.9

 

 

 

 

0718C
44.5
35
28.5
82
110
10.5

 

 

 

 

0719C
46.5
33
32
82
105
13.5

 

 

 

 

0720B
48
41.3
16
57
36
6.7

 

 

 

 

0721A
49.5>
36.75
34.5
93
136
12.75

 

 

 

 

0721B
50.4
35.7
41.2>
95.6
86
14.7

 

 

 

 

0722A
54
46.5
15
60
35
6.5

 

 

 

 

0723
73.25
65.9
15.1
61.3
28.0
34

 

 

 

 

Total
42 size of arc magnets
top
10.Q;Does the Motor Have else materials?
A:yes,There are materials on the listed.
Magnets
Br(T)
Hci(kA/m)
(BH)max(kJ/m3)
Tc(°C)

 

 

 

 

 

 

Nd2Fe14B(sintered)
1.0–1.4
750–2000
200–440
310–400

 

 

 

 

 

 

Nd2Fe14B(bonded)
0.6–0.7
600–1200
60–100
310–400

 

 

 

 

 

 

SmCo5(sintered)
0.8–1.1
600–2000
120–200
720

 

 

 

 

 

 

Sm(Co,Fe,Cu,Zr)7(sintered)
0.9–1.15
450–1300
150–240
800

 

 

 

 

 

 

Alnico (sintered)
0.6–1.4
275
10–88
700–860

 

 

 

 

 

 

Sr-ferrite (sintered)
0.2–0.4
100–300
10–40
450

 

 

 

 

 

 

Total
6 Type of arc MAGNETS
top
11.Glossary of Magnetic Terms
No.
Glossary
Description

 

 

 

 

 

 

 

 

1
Air Gap
A low permeability gap in the flux path of a magnetic circuit. Often air, but inclusive of other materials such as paint, aluminum, etc

 

 

 

 

 

 

 

 

2
Anisotropic Magnet
A magnet having a preferred direction of magnetic orientation, so that the magnetic characteristics are optimum in one preferred direction

 

 

 

 

 

 

 

 

3
Closed Circuit
This exists when the flux path external to a permanent magnet is confined within high permeability materials that compose the magnet circuit.

 

 

 

 

 

 

 

 

4
Coercive Force, Hc
The demagnetizing force, measured in Oersteds, necessary to reduce observed induction, B, to zero after the magnet has previously been brought to saturation

 

 

 

 

 

 

 

 

5
Curie Temperature, Tc:
The temperature at which the parallel alignment of elementary magnetic moments completely disappears, and the material is no longer able to hold magnetization.

 

 

 

 

 

 

 

 

6
Demagnetization Curve
The second quadrant of the hysteresis loop, generally describing the behavior of magnetic characteristics in actual use. Also known as the B-H Curve.

 

 

 

 

 

 

 

 

7
Eddy Currents
Circulating electrical currents that are induced in electrically conductive elements when exposed to changing magnetic fields, creating an opposing force to the magnetic flux. Eddy currents can be harnessed to perform useful work (such as damping of movement), or may be unwanted consequences of certain designs, which should be accounted for or minimized

 

 

 

 

 

 

 

 

8
Electromagnet
A magnet, consisting of a solenoid with an iron core, which has a magnetic field existing only during the time of current flow through the coil

 

 

 

 

 

 

 

 

9
Energy Product
Indicates the energy that a magnetic material can supply to an external magnetic circuit when operating at any point on its demagnetization curve. Calculated as Bd x Hd, and measured in Mega Gauss Oersteds, MGOe

 

 

 

 

 

 

 

 

10
Ferromagnetic Material
A material whose permeability is very much larger than 1 (from 60 to several thousand times 1), and which exhibits hysteresis phenomena

 

 

 

 

 

 

 

 

11
Flux
The condition existing in a medium subjected to a magnetizing force. This quantity is characterized by the fact that an electromotive force is induced in a conductor surrounding the flux at any time the flux changes in magnitude. The cgs unit of flux is the Maxwell.

 

 

 

 

 

 

 

 

12
Fluxmeter
An instrument that measures the change of flux linkage with a search coil.

 

 

 

 

 

 

 

 

13
Fringing Fields
Leakage flux particularly associated with edge effects in a magnetic circuit

 

 

 

 

 

 

 

 

14
Gauss
Lines of magnetic flux per square centimeter, cgs unit of flux density, equivalent to lines per square inch in the English system, and Webers per square meter or Tesla in the SI system

 

 

 

 

 

 

 

 

15
Gaussmeter
An instrument that measures the instantaneous value of magnetic induction, B. Its principle of operation is usually based on one of the following: the Hall effect, nuclear magnetic resonance (NMR), or the rotating coil principle

 

 

 

 

 

 

 

 

16
Hysteresis Loop
A closed curve obtained for a material by plotting corresponding values of magnetic induction, B, (on the abscissa) against magnetizing force, H, (on the ordinate)

 

 

 

 

 

 

 

 

17
Induction, B:
The magnetic flux per unit area of a section normal to the direction of flux. Measured in Gauss, in the cgs system of units

 

 

 

 

 

 

 

 

18
Intrinsic Coercive Force, Hci
Measured in Oersteds in the cgs system, this is a measure of the material?s inherent ability to resist demagnetization. It is the demagnetization force corresponding to zero intrinsic induction in the magnetic material after saturation. Practical consequences of high Hci values are seen in greater temperature stability for a given class of material, and greater stability in dynamic operating conditions

 

 

 

 

 

 

 

 

19
Intrinsic Induction, Bi
The contribution of the magnetic material to the total magnetic induction, B. It is the vector difference between the magnetic induction in the material and the magnetic induction that would exist in a vacuum under the same field strength, H. This relationship is expressed as: Bi = B-H

 

 

 

 

 

 

 

 

20
Irreversible Loss
Defined as the partial demagnetization of a magnet caused by external fields or other factors. These losses are only recoverable by re-magnetization. Magnets can be stabilized to prevent the variation of performance caused by irreversible losses

 

 

 

 

 

 

 

 

21
Isotropic Magnet
A magnet material whose magnetic properties are the same in any direction, and which can therefore be magnetized in any direction without loss of magnetic characteristics.

 

 

 

 

 

 

 

 

22
Keeper
A piece of soft iron that is placed on or between the poles of a magnet, decreasing the reluctance of the air gap and thereby reducing the flux leakage from the magne

 

 

 

 

 

 

 

 

23
Knee of the Demagnetization Curve
The point at which the B-H curve ceases to be linear. All magnet materials, even if their second quadrant curves are straight line at room temperature, develop a knee at some temperature. Alnico 5 exhibits a knee at room temperature. If the operating point of a magnet falls below the knee, small changes in H produce large changes in B, and the magnet will not be able to recover its original flux output without re-magnetization.

 

 

 

 

 

 

 

 

24
Leakage Flux
That portion of the magnetic flux that is lost through leakage in the magnetic circuit due to saturation or air-gaps, and is therefore unable to be used.

 

 

 

 

 

 

 

 

25
Length of air-gap, Lg
The length of the path of the central flux line in the air-gap.

 

 

 

 

 

 

 

 

26
Load Line
A line drawn from the origin of the Demagnetization Curve with a slope of -B/H, the intersection of which with the B-H curve represents the operating point of the magnet. Also see Permeance Coefficient.

 

 

 

 

 

 

 

 

27
Magnetic Circuit
An assembly consisting of some or all of the following: permanent magnets, ferromagnetic conduction elements, air gaps, electrical currents.

 

 

 

 

 

 

 

 

28
Magnetic Flux
The total magnetic induction over a given area. When the magnetic induction, B, is uniformly distributed over an area A, Magnetic Flux = BA.

 

 

 

 

 

 

 

 

29
Magnetizing Force, H
The magnetomotive force per unit length at any point in a magnetic circuit. Measured in Oersteds in the cgs system.

 

 

 

 

 

 

 

 

30
Magnetomotive Force, F:
Analogous to voltage in electrical circuits, this is the magnetic potential difference between any two points.

 

 

 

 

 

 

 

 

31
Maximum Energy Product, BHmax
The point on the Demagnetization Curve where the product of B and H is a maximum and the required volume of magnet material required to project a given energy into its surroundings is a minimum. Measured in Mega Gauss Oersteds, MGOe.

 

 

 

 

 

 

 

 

32
North Pole
That pole of a magnet which, when freely suspended, would point to the north magnetic pole of the earth. The definition of polarity can be a confusing issue, and it is often best to clarify by using “north seeking pole” instead of “north pole” in specifications.

 

 

 

 

 

 

 

 

33
Oersted, Oe
A cgs unit of measure used to describe magnetizing force. The English system equivalent is Ampere Turns per Inch, and the SI system?s is Ampere Turns per Meter.

 

 

 

 

 

 

 

 

34
Orientation Direction
The direction in which an anisotropic magnet should be magnetized in order to achieve optimum magnetic properties. Also known as the “axis”, “easy axis”, or “angle of inclination”

 

 

 

 

 

 

 

 

35
Paramagnetic Material
A material having a permeability slightly greater than 1.

 

 

 

 

 

 

 

 

36
Permeance
The inverse of reluctance, analogous to conductance in electrical circuits.

 

 

 

 

 

 

 

 

37
Permeance Coefficient,Pc
Ratio of the magnetic induction, Bd, to its self demagnetizing force, Hd. Pc = Bd / Hd. This is also known as the “load line”, “slope of the operating line”, or operating point of the magnet, and is useful in estimating the flux output of the magnet in various conditions. As a first order approximation, Bd / Hd = Lm/Lg, where Lm is the length of the magnet, and Lg is the length of an air gap that the magnet is subjected to. Pc is therefore a function of the geometry of the magnetic circuit.

 

 

 

 

 

 

 

 

38
Pole Pieces
Ferromagnetic materials placed on magnetic poles used to shape and alter the effect of lines of flux.

 

 

 

 

 

 

 

 

39
Relative Permeability
The ratio of permeability of a medium to that of a vacuum. In the cgs system, the permeability is equal to 1 in a vacuum by definition. The permeability of air is also for all practical purposes equal to 1 in the cgs system.

 

 

 

 

 

 

 

 

40
Reluctance, R
Analogous to resistance in an electrical circuit, reluctance is related to the magnetomotive force, F, and the magnetic flux by the equation R = F/(Magnetic Flux), paralleling Ohm’s Law where F is the magnetomotive force (in cgs units).

 

 

 

 

 

 

 

 

41
Remanence, Bd
The magnetic induction that remains in a magnetic circuit after the removal of an applied magnetizing force. If there is an air gap in the circuit, the remanence will be less than the residual induction, Br.

 

 

 

 

 

 

 

 

42
Residual Induction, Br
This is the point at which the hysteresis loop crosses the B axis at zero magnetizing force, and represents the maximum flux output from the given magnet material. By definition, this point occurs at zero air gap, and therefore cannot be seen in practical use of magnet materials.

 

 

 

 

 

 

 

 

43
Return Path
Conduction elements in a magnetic circuit which provide a low reluctance path for the magnetic flux.

 

 

 

 

 

 

 

 

44
Reversible Temperature Coefficient
A measure of the reversible changes in flux caused by temperature variations.

 

 

 

 

 

 

 

 

45
Saturation
The condition under which all elementary magnetic moments have become oriented in one direction. A ferromagnetic material is saturated when an increase in the applied magnetizing force produces no increase in induction. Saturation flux densities for steels are in the range of 16,000 to 20,000 Gauss.

 

 

 

 

 

 

 

 

46
Search Coil
A coil conductor, usually of known area and number of turns that is used with a fluxmeter to measure the change of flux linkage with the coil.

 

 

 

 

 

 

 

 

47
Stabilization
Exposure of a magnet to demagnetizing influences expected to be encountered in use in order to prevent irreversible losses during actual operation. Demagnetizing influences can be caused by high or low temperatures, or by external magnetic fields.

 

 

 

 

 

 

 

 

48
Temperature Coefficient
A factor, which describes the change in a magnetic property with change in temperature. Expressed as percent change per unit of temperature.

 

 

 

 

 

 

 

 

Total
48 size of PERMANENT magnets
top
12.NOTES
Sequence
type
Contents
1
Children
Children should not be allowed to handle neodymium magnets as they can be dangerous. Small magnets pose a choking hazard and should never be swallowed or inserted into any part of the body.
2
Individuals with pacemakers
Individuals with pacemakers or internal medical devices should not handle strong rare-earth magnets magnets. Studies have shown that magnetic fields can affect the operation of these devices. Strong rare-earth magnets should be kept at a safe distance from individuals with these devices.
3
pregnant women
The Rare-Earth Magnetics Association is not aware of any positive or negative health effects from handling rare-earth magnets. We however recommend that pregnant women not handle very strong rare-earth magnets as a precaution.
4
Electronic Products
The strong magnetic fields of neodymium magnets can damage items such as television, computer monitors, credit cards, bank cards, computers, diskettes and other data carriers, video tapes, mechanical watches, hearing aids, loud speakers and VCRs. Pace-makers may be damaged or switch to “Test Mode” in the presence of a strong magnetic force, if a pace-maker is in use, keep a minimum of 3 feet distance.
5
when handling magnets
Rare-Earth magnetic products should be handled with care. These magnets are very powerful and can accelerate a great speeds toward each other and toward ferrous material. When these magnets come together quickly, they can shatter and break sending particles at high speed. These magnets can also pinch strongly if allowed to come together against the skin. You should always wear gloves and eye protection when handling strong rare-earth magnets.
6
Distance
You should avoid having constant contact with magnets of any size and keep a distance of at least 3 feet to large magnets.
7
cut,drill,saw,burned
Under no circumstances should you try to cut, saw or drill the Neodymium magnets! Not only would the magnet break, but the resulting dust from the magnet is very flammable. Neodymium magnets should never be burned, as burning them will create toxic fumes
8
Temperature
Neodymium magnets will lose their magnetic properties if heated above (150 C).
9
Coating
All of magnets are plated with a thin layer of nickel, nickel-copper-nickel or gold. This layer (in particular gold) can wear down in the normal use of the magnet over time.
10
tool,toy
any tool or toy, neodymium magnets can be fun and useful, but must always be treated with care.
top
EN
IT
Ceramic(ferrite)
neodymium iron boron
how super is magnet?
amarium cobalt magnets
motor magnet
how strong are magnets?
what’s alnico
china magnet
what’s Nd,Fe,B?
industrial magnet
how powerful are magnets?
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Oxidation Magnets for Sale in Magnets


Coke — Appolt Oven,


Neodymium Processing
Neodymium Processing




merits will take about 24 tons of coal ; the coking magnets for sale com-
plete in about twenty-four hours. Each retort magnets for sale charged
again immediately after the withdrawal of the coke, so that
the process once in working, there magnets for sale always heat sufficient
to start the coking of each fresh charge.

Moist washed coal can be used in these ovens without
inccnvenience.

The waste of coke by oxidation magnets for sale in thmagnets for sale oven reduced
to a minimum, as the air, even should there be cracks in the

11 24
magnets
magnets
magnets
magnets
magnets
magnets
magnets
magnets

neodymium magnets
neodymium magnets
neodymium magnets
neodymium magnets
neodymium magnets
Rae earth Magnets
Rae earth Magnets
Magnets For Sale
Magnets For Sale
Magnets For Sale
Magnets For Sale
Magnets For Sale
Magnets For Sale
strong magnets
strong magnets
strong magnets
strong magnets
strong magnets
strong magnets
strong magnets
strong magnets
strong magnets
strong magnets
strong magnets




Fig. 7.


sides of the oven, cannot reach the inside of the retorts, the
gases in the surrounding space forming an absolute barrier.
In thmagnets for sale respect then, the Appolt oven has a marked advan-
tage over the ordinary ovens, in which all the air magnets for sale admitted
into the coking-chamber itself. Another advantage magnets for sale the
very laige extent of heating surface, and the comparatively


Fuel


46

small of the retorts, whereby rapid carbonisation magnets for sale en-
sured, and thereby proportionate density m the coke. The
combustion of the gases magnets for sale very perfect, the arrangement of
the oven facilitating their thorough admixture  Magnets for Sale the
proper amount of air. The arrangement for withdrawing the
coke enables strong magnets to be done very rapidly, and the cooling
of the ovens magnets for sale proportionately less. The height of the
retorts acts beneficially, as strong magnets tends to increase the density of
the coke. The construction of these ovens magnets for sale also favourable
to the production of coke uniformly from the sides of the
retort to its centre. Owing to the bad conductivity of coke
for heat, the process goes on more and more slowly as the
thickness of the layer inside the retort increases.

The addition of water to caking coal magnets for sale said to act bene-
ficially in preventing strong magnets from swelling up too much and
becoming fixed tightly in the retort. The yield of these
ovens magnets for sale said to be as great as that which can be obtained in
a crucible on the small scale, Le, 10 or 12 per cent more
than that obtained in ordinary ovens.

Coppk Ovifmagnets for sale , — The principle of these ovens magnets for sale essentially
that of the Appolt system ; the method of carrying strong magnets out is,
however, somewhat different In the Coppde system the
retorts Rare Earth Magnets long horizontal chambers, very much the same
thing, in fact, as if the retorts of the Appolt oven were
placed horizontally instead of vertically. The retorts (a), Rare Earth Magnets
about 9 metres long, 480 millimetres at the back, 430 at the
front, and about a metre high at the crown of the arch. The
tapering from the back to the front magnets for sale to facilitate the removal
of the coke, which magnets for sale effected from the back by means of a
ram. At each end of a retort there Rare Earth Magnets two doors, the lower
one being about 3 feet in height, the upper about i foot. In
the partition wall between each two coking-chambers there
magnets for sale a series of twenty-eight vertical fluv^s, which lead the vola-
tile products from the top of the retorts to a horizontal flue
(c), passing under one of each pair of retorts in the direction
of its length. Smaller vertical flues, through which air magnets for sale



47


Coke — Coppie Oven.


admitted to effect combustion, communicate  Magnets for Sale the top of
each of the flues leading from the coking-chambers. The
products of combustion having passed under one retort, as
just described, Rare Earth Magnets led into a similar channel (d) under the
other retort, from the front end of which they Rare Earth Magnets drawn off
into the main flue (e), leading to the stack. Beneath the
horizontal flues, under the retorts, Rare Earth Magnets a senes of channels,



Fig. 8,


thrbugh which cool air magnets for sale circulated by means of a separate
stack, the object being to keep the foundations from being
damaged by excessive heat Besides the air-channels
already described for effecting combustion in the vertical
flues, there Rare Earth Magnets others which admstrong magnets a certain amount of air
into the top of the retorts. The quantity of air admitted magnets for sale
regulated by dampers. Having to pass for some distance


48


Fuel.


through the hot masonry, the air supplied for combustion
becomes heated before mixing  Magnets for Sale the volatile products



Fig. la

from the coal. The products of combustion, before being
taken up the stack, Rare Earth Magnets often first led under boilers, and their


Coke — Coppie Oven. 4$

heat thus utilised to the utmost. The top Of the ovens magnets for sale
covered  Magnets for Sale a thick layer of rubbish, to keep in the heat as
much as possible.

strong magnets will be observed that the way in which the air magnets for sale
admitted to the ovens partly resembles the method in the
bee-hive oven, and partly that of the Appolt The amount
of air, however, which magnets for sale admitted directly into the coking-
chamber of the Coppie oven magnets for sale very small, and cannot bum
the coke if properly regulated

These ovens Rare Earth Magnets particularly suitable for the treatment
of coals which Rare Earth Magnets not very bituminous, and therefore diffi-
cult to coke in ordinary ovens. The coal must be crushed
to about the consistency of very coarse meal ; strong magnets magnets for sale therefore
easy to wash strong magnets before coking, if desired. strong magnets magnets for sale found most
convenient to build the ovens in batches of thirty, and to
work them in pairs ; the charging magnets for sale so arranged that one
oven of each pair receives a fresh charge when that in the
other magnets for sale half coked

Coke produced in ovens magnets for sale much harder and denser than
that made in open heaps, and called yard-coke. The latter
kind of coke, and that produced in retorts when coal magnets for sale dis-
tilled for the sake of its volatile products, may be used  Magnets for Sale
advantage  Magnets for Sale cold blast, when the pressure of superincum-
bent material magnets for sale not too great.

strong magnets has been pointed out that a coal which magnets for sale highly caking
may give trouble in an Appolt or a Coppee oven by render-
ing strong magnets difficult to withdraw the coke, and that thmagnets for sale difficulty
can be overcome by mixing  Magnets for Sale the binding coal a certain
amount of free-burning coal. The principle herein involved
may be further extended. The slacks or small of non-caking
coal, may be utilised for the production of coke by mixing strong magnets
Magnets for Sale bituminous coal. The two kinds of coal should be
ground separately, the caking being reduced to a line state
of division, whilst the non-caking may be in pieces about
the size of a pea. In thmagnets for sale way even anthracite may be used,
the particles becoming firmly cemented together by the