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Temperature dependence of elastic modulus of single crystal sapphire investigated by laser ultrasonic

Song Yun-Fei Yu Guo-Yang Yin He-Dong Zhang Ming-Fu Liu Yu-Qiang Yang Yan-Qiang

Temperature dependence of elastic modulus of single crystal sapphire investigated by laser ultrasonic

Song Yun-Fei, Yu Guo-Yang, Yin He-Dong, Zhang Ming-Fu, Liu Yu-Qiang, Yang Yan-Qiang
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  • Received Date:  07 June 2011
  • Accepted Date:  14 July 2011
  • Published Online:  20 March 2012

Temperature dependence of elastic modulus of single crystal sapphire investigated by laser ultrasonic

    Corresponding author: Yang Yan-Qiang, yqyang@hit.edu.cn
  • 1. Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
  • 2. Center of Composite Materials, Harbin Institute of Technology, Harbin 150001, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant No. 20973050).

Abstract: The longitudinal ultrasonic wave launched by ns-laser pulse is used to measure the temperature dependence of the elastic modulus C33 of single crystal sapphire. The result shows that in a temperature from room temperature to 1000 ℃ the elastic modulus of sapphire C33 reduces as the temperature increases, following the relationship C33 = - 1.541 10-5T2 - 0.021T + 498.3. In this method, the ablation mechanism is adopted to launch strong longitudinal waves, therefore, the result is accurate that the error of the measurement is estimated to be no more than 0.1%.

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