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Thermal Properties of Materials Characterized by Scanning Electron-Acoustic Microscopy
作者姓名:高椿明  张淑仪  张仲宁  水修基  蒋涛
作者单位:Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093
基金项目:Supported by the National Natural Science Foundation of China under Grant No 10174038.
摘    要:A modified technique of scanning electron-acoustic microscopy is employed to determine thermal diffusivity of materials. Using the dependence of the electron-acoustic signal on modulation frequency of the electron beam, the thermal diffusivity of materials is characterized based on a simplified thermoelastic theory. The thermal diffusivities of several metals characterized by the modified scanning electron-acoustic microscopy are in good agreement with the referential values of the corresponding materials, which proves that the scanning electronacoustic microscopy can be used to characterize the thermal diffusivity of materials effectively. In addition, for micro-inhomogeneous materials, such as biological tissues, the macro-effective (average) thermal diffusivities are characterized by the technique.

关 键 词:热材料  电子显微镜  电子扫描  扩散能力  调制频率
收稿时间:2005-04-04
修稿时间:2005-04-04

Thermal Properties of Materials Characterized by Scanning Electron-Acoustic Microscopy
Gao ChunMing;Zhang ShuYi;Zhang ZhongNing;Shui XiuJi;Jiang Tao.Thermal Properties of Materials Characterized by Scanning Electron-Acoustic Microscopy[J].Chinese Physics Letters,2005,22(9):2309-2312.
Authors:Gao ChunMing;Zhang ShuYi;Zhang ZhongNing;Shui XiuJi;Jiang Tao
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