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Fabrication of translucent silicon nitride ceramics with various sintering aids
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–Si3N4formed at a small amount of sintering aids.
Keywords: silicon nitride, sintered ceramics, translucency, spark plasma sintering, translucent ceramics, sintering aids, nanotechnology
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