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Generals
Cast Alnico magnets, which are aluminum
nickel-cobalt-iron alloys, are the most
established and widely used permanent magnet
materials. Because of their high flux
density and superior temperature stability,
cast magnets have been accepted in the
widest range of application
- High hardness-cast magnets are machined mainly by grinding.
- Low temperature coefficient. Usable at relatively high
ambient temperature with a minimum of Irreversible demagnetization.
- Effective usage of magnetic properties due to this materials
ability to be magnetized after assembly in the magnetic
circuit
- An extremely compact magnetic circuit is obtainable using
high energy cast magnets with optimized structures.
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Applications
- Speakers, microphones, telephones
- Micromotors
- Measuring instruments
(Volt, Amp, speed-meter, watt-hour-meter)
- Flywheel generators (motor-cycles, farming machine)
- Others (Alarm devices, toys, etc.)
- Conversion magnets for TV or PC
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Physical
Properties
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Curie Point
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850¡890¡É
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Maximum Permissible Temperture
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550¡É
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Specific Resisitivity
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50¡75¥ì§Ù-§¯
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Density
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¡7.3g/§¨
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Hardness
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Hrc45¡60
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Thermal Expansion Coefficient
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11¡13.5¡¿10-6/¡É
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Temperature Coefficient
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- 0.016%/¡É
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Magnetic
Characteristics
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Pacific Code
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Residual Flux Density
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Coercive Force
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Maximum Energy Product
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Br
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Hc
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(BH)Max.
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kG
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T
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Oe
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kA/m
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MGOe
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kJ/§©
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PMC-1A
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12.3¡12.8
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1.23¡1.28
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650¡700
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51.7¡55.7
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5.0¡5.5
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39.8¡43.8
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PMC-1B
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12.5¡13.0
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1.25¡1.30
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600¡660
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47.7¡52.5
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4.8¡5.5
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38.2¡43.8
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PMC-1D
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12.8¡13.2
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1.28¡1.32
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650¡700
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51.7¡55.7
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5.3¡6.2
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42.2¡49.3
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PMC-1L
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11.8¡12.4
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1.18¡1.24
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570¡620
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45.4¡49.3
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4.5¡5.2
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35.8¡41.4
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HIMAG
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13.0¡14.0
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1.30¡1.40
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700¡800
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55.7¡63.7
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6.5¡8.0
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51.7¡63.7
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PMC-2B
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10.0¡11.0
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1.00¡1.10
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700¡780
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55.7¡62.1
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3.5¡4.2
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27.8¡33.4
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PMC-2C
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11.0¡11.8
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1.10¡1.18
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680¡750
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54.1¡60.0
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3.5¡4.5
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27.8¡35.8
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PMC-4A
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6.0¡7.0
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0.60¡0.70
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550¡620
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43.7¡49.3
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1.3¡1.6
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10.3¡12.7
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PMC-4B
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6.0¡7.0
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0.60¡0.70
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500¡550
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39.8¡43.7
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1.3¡1.5
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10.3¡11.9
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PMC-4C
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5.0¡6.0
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0.50¡0.60
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650¡750
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51.7¡60.0
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1.3¡1.7
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10.3¡13.5
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PMC-5AB
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8.0¡9.5
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0.80¡0.95
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130¡190
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10.3¡15.1
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-
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-
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PMC-8B
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8.3¡9.0
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0.83¡0.90
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1380¡1550
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110¡123
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4.8¡5.4
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38.2¡43.0
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PMC-8C
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8.5¡9.0
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0.85¡0.90
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1500¡1650
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119¡131
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5.0¡6.5
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39.8¡51.7
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PMC-8E
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7.5¡8.5
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0.75¡0.85
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1800¡2100
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143¡167
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5.5¡7.0
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43.8¡55.7
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PMC-9B
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10.0¡11.0
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1.00¡1.10
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1300¡1500
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104¡119
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9.0¡11.0
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71.6¡87.5
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Demagnetic
Characteristics
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