Sintered Neodymium

About Sintered Neodymium

Driven by the high cost of samarium cobalt magnets, the Nd2Fe14B Compound was first discovered in 1982. Neodymium magnets are the strongest type of permanent magnet commercially available. Alpha Magnet sells only patent licensed sintered neodymium magnets. Neodymium has excellent characteristics: it has very high remanence and coercivity. It is possible to manufacture in a variety of shapes including radial oriented magnets. Previously for higher temperatures, only samarium cobalt was able to meet certain requirements. With the development of modern neodymium grades, some grades are able to exceed acceptable samarium cobalt temperatures. However, for most high temperature applications, samarium cobalt is still used based on a lower cost. Neodymium is one of the most widely used magnets today because of its versatility, strong magnetic capability, and small relative size.


Process

A powder metallurgical process is used to create sintered neodymium magnets. As is true of other magnets, it should not be used as a structural component. Neodymium is prone to corrosion, requiring an outer coating or plating. Typically, a nickel-copper-nickel or epoxy coating is used. Other coatings are available if required. Also, as the sintered neodymium is being manufactured in a vacuum, any air particles will allow the magnet to corrode from the inside out. Within 2-3 years, the poor quality will become apparent to the customer, ruining the final product. All Alpha Magnet products are held to a rigid quality standards. Patented processes are used to produce high quality magnets which are built to last.


Temperature Characteristics

Neodymium magnets typically have a higher temperature coefficient than other rare earth magnets. When the magnet is exposed to a higher temperature, it may lose all or part of its magnetic performance. Depending on the temperature, magnet loss can be reversible. The recommended max operating temperature, residual induction(Br), and the intrinsic coercive force(Hci) should be considered when determining which magnet to use for your application. Contact your Alpha Magnet representative to find out the correct magnet for your application.

Applications include electronic, industrial, automotive, aerospace, as well as wind power solutions.


Precision Forming Process

The traditional forming method starts with large blocks of material to be cut into smaller blocks. In our proprietary process, the material is formed into an arc shape similar to the final product—thus reducing waste and cost for arc-shaped magnets. These savings we pass onto you, the customer. The three unique steps in our new process are highlighted below:

 

Radial Oriented Ring Magnet

By creating just one single magnet specifically designed for your application, we are able to provide your company a product that is stronger, more reliable, and more efficient. The magnets are multi-pole—which does not compromise the magnetic properties.

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MATERIAL GRADES

GradeRemanenceIntrinsic CoercivityCoercivityMaximum Energy ProductOperating Temp.

BrHcJHcB(BH)max

TkGskA/mk0ekA/mk0ekJ/m^3MGOe°C

RangeMinimum ValueMinimum ValueRange
N351.17~1.2211.7~12.29551286810.9263~28733~3680
N381.22~1.2612.2~12.69551289911.3287~31036~3980
N401.25~1.2912.5~12.99551292311.6302~32638~4180
N421.28~1.3212.8~13.29551292311.6318~34240~4380
N451.32~1.3713.2~13.79551287611.0342~36643~4680
N481.37~1.4213.7~14.29551289211.2366~39046~4980
N501.39~1.4413.9~14.49551283610.5374~40647~5180
N521.42~1.4714.2~14.78761183610.5390~42249~5380
N551.46~1.5214.6~15.2876117169.0414~44652~5680
N30M1.08~1.1310.8~11.311141479610.0223~24728~31100
N33M1.13~1.1711.3~11.711141483610.5247~27131~34100
N35M1.17~1.2211.7~12.211141486810.9263~28733~36100
N38M1.22~1.2612.2~12.611141489911.3287~31036~39100
N40M1.25~1.2912.5~12.911141492311.6302~32638~41100
N42M1.28~1.3212.8~13.211141495512.0318~34240~43100
N45M1.32~1.3713.2~13.711141499512.5342~36643~46100
N48M1.37~1.4213.9~14.2111414101912.8358~39045~49100
N50M1.39~1.4413.9~14.4111414103513.0374~40647~51100
N52M1.42~1.4714.2~14.710351399612.5390~42249~53100
N28H1.04~1.0910.4~10.91353177649.6199~22325~28120
N30H1.08~1.1310.8~11.313531779610.0223~24728~31120
N33H1.13~1.1711.3~11.713531783610.5247~27131~34120
N35H1.17~1.2211.7~12.213531786810.9263~28733~36120
N38H1.22~1.2612t.2~12.613531789911.3287~31036~39120
N40H1.25~1.2912.5~12.913531792311.6302~32638~41120
N42H1.28~1.3212.8~13.213531795512.0318~34240~43120
N45H1.32~1.3713.2~13.713531797112.2342~36643~46120
N48H1.37~1.4213.7~14.2135317102712.9358~39045~49120
N50H1.39~1.4413.9~14.4127416103513.0374~40647~51120
N28SH1.04~1.0910.4~10.91592207809.8199~22925~28150
N30SH1.08~1.1310.8~11.315922080410.1223~24728~31150
N33SH1.13~1.1711.3~11.715922084410.6247~27131~34150
N35SH1.17~1.2211.7~12.215922087611.0263~28733~36150
N38SH1.22~1.2612.2~12.615922090711.4287~31036~39150
N40SH1.25~1.2912.5~12.915922093911.8302~32638~41150
N42SH1.28~1.3212.8~13.215922097112.2318~34240~43150
N45SH1.32~1.3713.2~13.715922097912.3342~36643~46150
N48SH1.37~1.4213.7~14.215121999512.5358~39045~49150
N28UH1.02~1.0810.2~10.81990257649.6207~23126~29180
N30UH1.08~1.1310.8~11.319902581210.2223~24728~31180
N33UH1.13~1.1711.3~11.719902585210.7247~27131~34180
N35UH1.17~1.2211.7~12.219902586010.8263~28733~36180
N38UH1.22~1.2612.2~12.619902587611.0287~31036~39180
N40UH1.25~1.2912.5~12.919902591511.5302~32638~41180
N42UH1.27~1.3212.7~13.219902597112.2310~34239~43180
N28EH1.04~1.0910.4~10.92388307809.8207~23126~29200
N30EH1.08~1.1310.8~11.323883081210.2223~24728~31200
N33EH1.13~1.1711.3~11.723883082010.3247~27131~34200
N35EH1.17~1.2211.7~12.223883083610.5263~28733~36200
N38EH1.20~1.2612.0~12.623883091511.5279~31035~39200
N28AH1.02~1.0910.2~10.92706347809.8199~23125~29240
N30AH1.07~1.1310.7~11.327063481210.2215~24727~31240
N33AH1.11~1.1711.1~11.727063483610.5239~27130~34240

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    Alpha Magnet
    1312 E. Orangethorpe Ave
    Fullerton, CA 92831
    p: 714-701-6780