Transparent ZnAl2O4ceramics fabricated by spark plasma sintering

Byung Nam Kim*, Keijiro Hiraga, Ahrong Jeong, Chungfeng Hu, Tohru S. Suzuki, Jon Do Yun, Yoshio Sakka

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


Highly transparent zinc aluminate ceramics were fabricated by the solid-state reaction using a spark plasma sintering machine. The sintered body exhibited a microstructure consisting of submicron-sized grains and extremely low porosities. Annealing of the sintered body in air improved the transmission close to the theoretical limit in a wavelength range of 1-5μm. The band gap energy estimated from the absorption coefficient was 4.3 eV. The Young's modulus and the bulk modulus measured for the fully dense zinc aluminates were 282 and 211 GPa, respectively.

Original languageEnglish
Pages (from-to)784-787
Number of pages4
JournalJournal of the Ceramic Society of Japan
Issue number1429
Publication statusPublished - 2014 Sept 1
Externally publishedYes


  • Annealing
  • Band gap energy
  • Elastic property
  • Spark plasma sintering
  • Transmission
  • Zinc aluminate

ASJC Scopus subject areas

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


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