Open AccessTransparent ZnAl<sub>2</sub>O<sub>4</sub> ceramics fabricated by spark plasma sintering
Author(s) -
Byung-Nam Kim,
Keijiro Hiraga,
Ahrong Jeong,
Chungfeng Hu,
Tohru Suzuki,
Jondo Yun,
Yoshio Sakka
Publication year - 2014
Publication title -
journal of the ceramic society of japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.353
H-Index - 56
eISSN - 1882-0743
pISSN - 1348-6535
DOI - 10.2109/jcersj2.122.784
Subject(s) - materials science , spark plasma sintering , ceramic , sintering , microstructure , annealing (glass) , aluminate , plasma , metallurgy , composite material , analytical chemistry (journal) , chemistry , physics , chromatography , quantum mechanics , cement
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 1–5 µm. 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