根据应变片测量线膨胀系数的方法,建立了室温至液氮温区的材料线膨胀系数测量装置,进而对常用低温电连接器所涉及的几种典型膨胀合金和玻璃在低温下的膨胀特性进行了测量,获得相应温区的线膨胀系数.%Based on the method of strain gage,an experimental setup was built to measure the linear thermal expansion coefficient in 77-293 K.The measurement of the linear thermal expansion coefficient was then carried out with the typical materials for electric connector,such as the expansion alloys 4J29,4J33,4J36 and the glasses DM-305,DM-308,DM211.
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