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各种结构的膨胀计所测量的线胀温度系数是材料的重要特性。目前对线胀温度系数的测量结果准确度的要求正不断提高。因此必须要知道材料热膨胀特性的温度范围,包括低温(氦和氢)和高温(1500～2500℃)。
The linear expansion coefficient of temperature measured by dilators of various structures is an important property of the material. The current requirements for the accuracy of measurement of linear expansion coefficient of temperature are increasing. Therefore, it is necessary to know the temperature range of thermal expansion characteristics of the material, including low temperature (helium and hydrogen) and high temperature (1500 ~ 2500 ℃).