Device and method for measuring thermal expansion coefficient of solid material

The invention discloses a device and method for measuring a thermal expansion coefficient of a solid material. The device comprises an auto-collimator, a vacuum chamber, a single-side plane reflector,an electric lifting mechanism and a temperature adjusting device. When the temperature of the temperature is changed, the tilt angle of the plane reflector is changed and the variation of the tilt angle can be measured by the auto-collimator so as to obtain a thermal expansion coefficient of the material. The device has a simple principle and is easy to operate. The device and method can test anysolid material sample and have a wide application range. Compared with the existing thermal expansion coefficient measurement scheme, the method is free of a complicated light path, reduces measurement difficulty, reduces a device cost and improves measurement accuracy of a thermal expansion coefficient. 本发明公开了种固体材料热膨胀系数的测量装置及方法，该装置包括自准直仪、真空仓、单面平面反射镜、电动升降机构和温度调节装置。当变温样品温度改变时，平面反射镜的倾角会发生变化，倾角的变化量可由自准直仪测量出，从而得到材料的热膨胀系数。本发明原