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Fabrication of Aluminum Oxynitride (γ‐ AlON ) Transparent Ceramics with Modified Gelcasting
Author(s) -
Wang Jun,
Zhang Fang,
Chen Feng,
Zhang Hailong,
Tian Run,
Dong Manjiang,
Liu Juan,
Zhang Zhao,
Zhang Jian,
Wang Shiwei
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12853
Subject(s) - materials science , ceramic , slurry , transmittance , calcination , aqueous solution , fabrication , hydrolysis , composite material , chemical engineering , sol gel , nanotechnology , chemistry , organic chemistry , medicine , alternative medicine , optoelectronics , pathology , engineering , catalysis
Transparent aluminum oxynitride ( AlON ) ceramics have been prepared through aqueous gelcasting forming technique starting from the raw materials of single phase AlON powders. The powder was specially treated for anti‐hydrolysis in ethanol before the shaping technique. The surface‐treated AlON powders could then be dispersed in an aqueous‐organic solution to prepare stable slurries containing 35 vol% solids loading. The obtained stable slurries were subsequently casted, calcined, and pressureless sintered at 1950°C for 8 h in nitrogen atmosphere. High transparent AlON ceramics with an average grain size of 112 μm and the in‐line transmittance of 81% at wavelength 1100 nm have been obtained.