Fabrication of translucent AlN ceramics with MgF 2 additive by spark plasma sintering

Hyoung Won Son, Byung Nam Kim, Tohru Suzuki, Yoshikazu Suzuki

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Translucent AlN ceramics with 0-2 wt.% MgF 2 additive were prepared by spark plasma sintering. AlN powder was heated temporarily up to 2000°C, before holding at 1850°C for 20 minutes in N 2 gas. The sintered ceramics consisted of a single phase of hexagonal AlN, and showed a transgranular fracture mode. The total transmittance was improved remarkably by the additive, to reach 74% at a wavelength of 800 nm for 1 wt.% MgF 2 . For 2 wt.% MgF 2 , the transmittance was slightly lower than that for 1 wt.% MgF 2 , and an absorption band was observed apparently at around 400 nm. The addition of MgF 2 along with the temporary heating at higher temperatures than the sintering temperature contributed to improve the transmittance remarkably.

Original languageEnglish
Pages (from-to)4430-4433
Number of pages4
JournalJournal of the American Ceramic Society
Volume101
Issue number10
DOIs
Publication statusPublished - 2018 Oct 1
Externally publishedYes

Keywords

  • aluminum nitride
  • spark plasma sintering
  • transparent ceramics

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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