Title: Fabrication of translucent silicon nitride ceramics with various sintering aids

Authors: W.W. Yang; M. Inada; Y. Tanaka; N. Enomoto; J. Hojo

Addresses: Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Motooka Nishi-ku Fukuoka 819-0395, Japan. ' Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Motooka Nishi-ku Fukuoka 819-0395, Japan. ' Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Motooka Nishi-ku Fukuoka 819-0395, Japan. ' Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Motooka Nishi-ku Fukuoka 819-0395, Japan. ' Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Motooka Nishi-ku Fukuoka 819-0395, Japan

Abstract: Polycrystalline translucent Si3N4 sintered ceramics are receiving attention owing to their high mechanical strength and chemical stability. Regardless of a long history to sinter Si3N4, there have been few reports on the fabrication of translucent Si3N4 ceramics. In this study, the authors used three systems including AlN-MgO, AlN-Y2O3 and Al2O3-Y2O3 as sintering aids of Si3N4, and the phase composition and transmittance of sintered samples were compared. The translucent α-sialon formed at a large amount of sintering aids and the translucent β-Si3N4 formed at a small amount of sintering aids.

Keywords: silicon nitride; sintered ceramics; translucency; spark plasma sintering; translucent ceramics; sintering aids; nanotechnology.

DOI: 10.1504/IJNT.2013.050888

International Journal of Nanotechnology, 2013 Vol.10 No.1/2, pp.119 - 125

Published online: 07 Dec 2012 *

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