METHOD AND DEVICE FOR STABILIZING LENGTH OF ENGINEERING MATERIAL USING THERMOPHYSICAL CHARACTERISTIC OF GALLIUM

摘要

Disclosed are a device and a method for making an experiment on temperature characteristic of material. The device includes a small volume thermostat for maintaining temperature uniformly and an interferometer for measuring a length change according to a temperature change of a measured fragment. Material, which maintains inside temperature of the thermostat uniformly, is disposed around the thermostat. The material maintains temperature uniformly for a long time when phase is changed. A hole is formed in a front surface of the thermostat to allow beam to be transmitted, thereby measuring the length change of the measured fragment inside the thermostat. By measuring the length change in a noncontact way when beam is transmitted through the hole, the temperature characteristic of the material is tested according to temperature.