新型吸波Nd4YFe88.5B6.5合金的制备及性能

Preparation and Properties of a Novel Absorption Nd4YFe88.5B6.5 Alloy

摘要:

通过真空熔炼、不同时间球磨和适当退火处理制得一种新型的吸波材料Nd4YFe88.5B6.5。对其进行性能测试表明：各样品对微波吸收量在所测频率范围内整体较高波动较小，且随着球磨时间的增加而提高，经退火处理后样品的微波吸收量会大幅度提升。其中，球磨40 h未退火的样品在频率为10.63 GHz处最大吸收量达55.287 dB，在550 ℃下退火15 min后该样品吸波性能有显著提高，在频率为12.43 GHz处最大吸收量达132.415 dB。还进一步对其吸波性能提高的原因进行了分析探讨。

Abstract:

A kind of novel absorption material Nd4YFe88.5B6.5 was prepared by vacuum smelting, different ball milling time and proper annealing. The properties of the samples were tested. Results show that the microwave absorption values of all the unannealed and annealed samples are high and have a narrow range fluctuation. They increase with ball milling time prolonging and are improved greatly after annealing. The sample milled for 40 h owns the max absorption of 55.287 dB at the frequency of 10.63 GHz, while its absorption is improved greatly after annealing for 15 min at 550 oC, and the max absorption reaches to 132.415 dB at the frequency of 12.43 GHz. The causes of higher absorption properties were also discussed.