Fabrication of dense Si3N4 ceramics via coating amorphous Si3N4 nano-powders by sodium reduction in liquid ammonia

Qi Wang, Mei Yang, Jiusan Xiao, Hongmin Zhu

Research output: Contribution to journalArticlepeer-review

Abstract

Commercial Si3N4 powders coated with 030% 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 45C. 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 1500C without sintering additives.

Original languageEnglish
Pages (from-to)509-512
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume125
Issue number6
DOIs
Publication statusPublished - 2017 Jun

Keywords

  • Liquid ammonia
  • Nano-powders
  • SiN
  • Spark plasma sintering

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Fabrication of dense Si3N4 ceramics via coating amorphous Si<sub>3</sub>N<sub>4</sub> nano-powders by sodium reduction in liquid ammonia'. Together they form a unique fingerprint.

Cite this