Effect of Microstructure on Transmission Properties of Polycrystalline Transparent Ceramics

Abstract:

The transmission properties of polycrystalline transparent ceramics are influenced by the chemical composition and the microstructure of the material. The fundamental optical mechanism of transparent ceramics and the influencing factors on transmission properties were discussed in this paper. The Mie theory for light scattering is applied to calculate scattering coefficients of residual pores and optical birefringence. The in-line transmission curves of the transparent alumina were calculated as a function of pore size, porosity and grain size. The results show that scattering by the residual pores is the dominant influencing factors on transmission properties. The scattering by the residual pores increases with an increase in porosity and the maximum of the scattering was observed when the pore size close to the optical wavelength. Optical birefringence in the transparent ceramics with non-cubic crystal structure has an important effect on the in-line transmission. The in-line transmission increases with a decrease in grain size. Keywords: transparent ceramics; microstructure; light scattering; birefringence

• Periodical: Materials Science Forum (Volumes 704-705)
• Pages: 842-846
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.704-705.842
• Online since: December 2011
• Authors: Qing Li, Guo Ping Zhang, Yang Liu, Hao Wang, Li Wen Lei
• Keywords: Birefringence, Light Scattering, Microstructure, Transparent Ceramics

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