超磁致伸缩材料的特性参数测量及其应用研究

The Measurement of Features of Magnetostrictive Material and its Application

超磁致伸缩材料（Ｔｂ０.２７Ｄｙ０.７３Ｆｅ１.９５）是一种新型的功能材料，具有应变大、响应快、能量传输密度高等特点。本文介绍国产区域熔炼法制备的多晶超磁致伸缩材料主要特性参数的测量方法、结果，并将实测特性与国外同类材料特性进行了比较，表明国产材料具有较佳的性能；还介绍了采用该材料研制的电－气动伺服压力控制阀，给出了电－机械转换器静、动态特性曲线和电－气动伺服压力控制阀输出特性曲线。实验结果表明，研制的转换器具有好的频率响应特性，较宽的输出位移控制范围；压力阀的控制特性是满意的。

The magnetostrictive material is a new type of functional material with giant magnetostrictive strain, high response speed and high power density. This paper introduces the characteristics' measurement of the material homemade with floating-zone method and its application in pneumatic pressure valve. The experimental results show that the material has good properties and the pressure valve's control characteristics is satisfactory.