稀土烧结磁体.高温下磁性的稳定性

[中文适用范围]： 本技术报告的范围是详细描述稀土烧结磁体在高温下工作的磁路设计中的温度行为。描述了 SmCo5、Sm2Co17 和 Nd-Fe-B 烧结磁体的温度行为。讨论了由于温度引起的开路磁通的各种变化。讨论了磁体的长期稳定性。描述了实验程序。给出了在 50 °C、75 °C、100 °C、125 °C、150 °C 和 200 °C 下等温加热长达 1000 小时后，在环境温度下发生的磁通损失测量结果。还研究了磁体样品的长径比（L/D）和矫顽力（HcJ）对磁通损失的影响。结果在第 8 章中进行了讨论。本技术报告中的数据由日本电气工程师学会（IEEJ）及其分会提供。这些数据是从这些分会的成员处收集的。本技术报告不提供与复杂腐蚀行为和低温下自旋重取向现象相关的温度稳定性。 [外文原描述]： IEC/TR 62518:2009(E) describes the temperature behaviour of rare earth sintered magnets in detail for use in designing magnetic circuits exposed to elevated temperatures. The temperature behaviour of SmCo5, Sm2Co17 and Nd-Fe-B sintered magnets is described. The various changes of open circuit flux which can occur due to temperature are discussed in Clause 4. The long term stability of the magnets is discussed in Clause 5. The experimental procedures are described in Clause 6. Results of the measurements of the flux loss occurring at the ambient temperature after heating isothermally at 50 °C, 75 °C, 100 °C, 125 °C, 150 °C and 200 °C for up to 1000 h are given in Clause 7. The effect of length to diameter ratio (L/D) of the magnet samples and the influence of HcJ on the flux loss were also studied. The results are discussed in Clause 8. The data in this technical report was provided by the Institute of Electrical Engineers of Japan (IEEJ) and its subcommittees. This data has been gathered from the members of these sub-committees. The temperature stability correlated with the complex corrosion behaviour and the spin re-orientation phenomena at cryogenic temperatures will not be given in this technical report.