Magnets with good stability and high working temperature
As we all know, NdFeB Magnets have worse stability of temperature, compared with some permanent magnetic materials, Such as ALNiCo, SmCo etc.This Restricts the usage of NdFeB Magnets in some special field directly. Common NdFeB magnet's temperature coefficientβHcj is more than -0.6%/℃,While our magnets is less than -0.5%/℃,and have excellent temperature stability
Correlative Temperature Coefficient Data
parameter technique
Conventional formula
T Series
L-T Series
αBr
-0.11~-0.128%/℃
-0.1~-0.11%/℃
-0.09~-0.1%/℃
βHcj
-0.6~-0.7%/℃
-0..55~-0.6%/℃
-0.45~-0.55%/℃
correlative between low weight loss & temperature coefficient
(1) standard tests for low weight loss
USA standard PCT(121℃±1℃,2atm,100%RH)
EUROPE standard HAST(130℃±1℃,3atm,100%RH)
(2) Data For Low Weight & Testing Time. Relationship Between Low Weight Loss & Temperature Coefficient
parameter technique
Serial No
121℃ 2atm 100%RH 96Hours
131℃ 3atm 100%RH 168Hours
Coventional Technology
Without T-series
>150mg/cm2
>500mg/cm2
With T-series
50-150mg/cm2
100-500mg/cm2
With L-T series
10-50mg/cm2
50-200mg/cm2
special Technology
Without T-series
≤50mg/cm2
50-300mg/cm2
With T-series
≤10mg/cm2
≤50mg/cm2
With L-T series
≤3mg/cm2
≤5mg/cm2
Remark:
1.Please note: Reversible temperature Coefficient is relative to ratio of length:square and diagram,etc.
2.Base on one certain production technology, the magnets with low temperature Coefficients data accordingly
3.We suggest to use L-T series Magnets with low weight loss on the wind Turbines generators ,Tide Generators, Marsh Gas Generators, Which have to ensure high reliability on function, this will help them to increase the ability of corrosion resistance, and Prolong the use age, get down the maintain cost of facility
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