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Thermal Properties of Materials Characterized by Scanning Electron-Acoustic Microscopy |
| GAO Chun-Ming;ZHANG Shu-Yi;ZHANG Zhong-Ning;SHUI Xiu-Ji;JIANG Tao |
| Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093 |
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GAO Chun-Ming, ZHANG Shu-Yi, ZHANG Zhong-Ning et al 2005 Chin. Phys. Lett. 22 2309-2312 |
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Abstract 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 electron-acoustic 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.
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| Keywords:
44.10.+i
66.10.Cb
66.70.+f
78.20.Hp
78.20.Nv
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Published: 01 September 2005
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