Fabrication of translucent AlN ceramics with MgF2 additive by spark plasma sintering

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

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Translucent AlN ceramics with 0-2 wt.% MgF2 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 N2 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.% MgF2. For 2 wt.% MgF2, the transmittance was slightly lower than that for 1 wt.% MgF2, and an absorption band was observed apparently at around 400 nm. The addition of MgF2 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
Externally publishedYes

Keywords

  • aluminum nitride
  • spark plasma sintering
  • transparent ceramics

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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