Abstract
This paper presents some of the important parameters while measure the vapor chamber axial thermal resistance. The experiment also included how to improve the accuracy of the axial thermal resistance by using different fixtures in different conditions. Using a water jacket as an example, the laboratory equipment include a water jacket without flow channel (Type A), water jackets with flow channel (Type B、Type C), a copper block with thermal couples, two Bakelite supports and an aluminum clamp. The research shows that the experiment with an aluminum clamp, Type B water jacket without Bakelite support and copper block will get the best performance. In addition, a thermal diffusivity of vapor chamber measurement device is also developed in experiment. The results indicate that one dimension mode is fit when vapor chamber aspect ratio τ less than 0.1; while two dimension mode is suggested when aspect ratio larger than 0.1. Four pure metals were analyzed in experiment and compare with its standard thermal diffusivity, all the error are within 10%. The repeatability error is less than 5%.