Indium Tin Oxide
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United States of America Patent
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Issued Date -
Oct 23, 2008
app pub date -
May 24, 2005
filing date -
May 28, 2004
priority date (Note) -
Abandoned
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Abstract
A method of preparing indium tin oxide (ITO) and such an oxide per se are described. The method utilises a cryogenic process wherein an aqueous formulation of indium sulphate, ammonium sulphate and a tin compound, optionally in the presence of an organic polymer, are frozen to produce a solid; the solid is conditioned by heating it to cause crystallisation of water in the solid; the water is removed for example by freeze drying; and the solid is then calcined. The ITO produced may have a surface tin concentration of less than 2 and other desirable properties.
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