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Fabrication of Low‐Porosity Indium Tin Oxide Ceramics in Air from Hydrothermally Prepared Powder
Author(s) -
Udawatte Chandana P.,
Yanagisawa Kazumichi
Publication year - 2001
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/j.1151-2916.2001.tb00645.x
Subject(s) - materials science , sintering , calcination , porosity , indium , ceramic , tin , oxide , indium tin oxide , chemical engineering , microcrystalline , metallurgy , fabrication , tin oxide , mineralogy , composite material , layer (electronics) , chemistry , crystallography , medicine , biochemistry , alternative medicine , pathology , engineering , catalysis
Compositionally homogeneous indium tin oxide (ITO) ceramics with low porosity were obtained successfully by sintering hydrothermally prepared powders. The fabrication technique began with the preparation of microcrystalline, homogeneously tin‐doped (5 wt%) indium oxyhydroxide powder, under hydrothermal conditions. Low‐temperature (∼500°C) calcination of the hydrothermally derived powder led to the formation of a substitutional‐vacancy‐type solid solution of In 2 Sn 1− x O 5− y , and further heating of this phase at temperatures of >1000°C resulted in the formation of the tin‐doped indium oxide phase, which had the C ‐type rare‐earth‐oxide structure. The sintering of uniformly packed, calcined powder compacts at 1450°C for 3 h in air resulted in low‐porosity (∼0.7%) ITO ceramics.