Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
Regular Issue: Full papers
Fabrication of dense Si3N4 ceramics via coating amorphous Si3N4 nano-powders by sodium reduction in liquid ammonia
Qi WANGMei YANGJiusan XIAOHongmin ZHU
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2017 Volume 125 Issue 6 Pages 509-512

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Abstract

Commercial Si3N4 powders coated with 0–30% amorphous Si3N4 nano-powders were fabricated successfully. Amorphous Si3N4 nano-powders coating were prepared through the reduction of silicon tetrachloride (SiCl4) by sodium in liquid ammonia at −45°C. Dense Si3N4 ceramics with 97.2% relative density of theoretic value were obtained from Si3N4 micro-powders coated with 30% nano-powders sintered by spark plasma sintering at 1500°C without sintering additives.

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© 2017 The Ceramic Society of Japan
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