Fabrication of electronic conductive silicon nitride ceramics by convenient powder metallurgical process

Yoon Ho Kim, Tohru Sekino, Hirokazu Kawaoka, Rak Joo Sung, Takafumi Kusunose, Tadachika Nakayama, Koichi Niihara

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Si3N4 ceramics with V2O5 based glasses as sintering additives were successfully fabricated by a powder mixing process and rapid sintering by the PECS method. The fabricated materials by Pulsed Electric Current Sintering (PECS) exhibited very fine microstructure with a and β grains. Electric conductivity for the Si3N 4/(V2O5-B2O3) and the Si3N4/(V2O5-B2O 3-Al2O3) at room temperature were four and six orders of magnitude higher at room temperature, and two and three orders of magnitude higher at 1000°C than the conventional Si3N4 respectively.

Original languageEnglish
Pages (from-to)645-648
Number of pages4
JournalKey Engineering Materials
Volume317-318
Publication statusPublished - 2006 Jan 1

Keywords

  • Electrical conductivity
  • Glassy grain boundary phase
  • Powder metallurgical process
  • Silicon nitride
  • VO-based glass

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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