| Materials Development in α-Sialon Ceramics |
| Mitomo Mamoru , Xie Rong-Jun , Hirosaki Naoto |
| National Institute for Materials Science, Namiki |
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| ABSTRACT |
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The solid solutions of ${alpha}-Si_3N_4$, i.e. ${alpha}$-sialons, are represented by a general formula of $M_x(Si,Al)_{12}(O,N)_{16}$, in which metal ions (M) dissolve into interstitial sites to stabilize the structure. Processing methods for the fabrication of ${alpha}/{beta}$-sialon composites, ${alpha}-sialon/{beta}Si_3N_4$ composites, refractory or tough ${alpha}$-sialon ceramics have been developed to tailor the mechanical properties. Translucent and photoluminescent properties have been investigated recently. A number of applications of ${alpha}$-sialon ceramics as engineering and optical ceramics are also presented. |
| Key words:
${\alpha}$-sialon, Microstructure, Engineering ceramics, Photoluminescence, White LED |
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