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Fabrication, Microstructure and Properties of Hot-Pressed Nd:YAG Ceramics

S.M. Naga, M. Awaad, H.F. El-Maghraby, W.H.Eisa, M. Abou el Ezz, F. Sommer, R. Gadow

Journal of Ceramic Science and Technology, Vol. 3, No. 1 (2012), pp. 35-40

DOI: 10.4416/JCST2012-00043

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Abstract

Neodymium-doped yttrium-aluminum garnet (Nd:YAG) ceramics that contained 0.025, 0.05 and 0.10 at% Nd2O3 additives and exhibited nearly the same optical properties as those of a single crystal were fabricated by means of the sol-gel technique and hot press sintering method. Transparent YAG and Nd:YAG ceramics are fabricated either by high-temperature vacuum sintering or post-hot isostatic pressing but not hot pressing. 0.5 mass% TEOS was used as a sintering aid. A nearly pore-free microstructure with an average grain size of 5 – 10 μm was obtained by sintering at 1700 °C. The optical transmittance of the samples was 98 % in the 532 nm wavelength.

Keywords

Keywords: YAG ceramics, Nd2O3 addition, optical properties, microstructure

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