Indium tin oxide powder, production method therefor, transparent conductive composition, and indium tin hydroxide
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United States of America Patent
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Jan 6, 2015
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app pub date -
Oct 25, 2010
filing date -
Oct 16, 2009
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Abstract
One aspect of an indium tin oxide powder has a specific surface area of 55 m2/g or more, wherein a color tone is from bright yellow to a color of persimmons or a half-width in the peak of (222) plane is 0.6° or less on an X-ray diffraction chart. Another aspect of the indium tin oxide powder has a modified surface, wherein a specific surface area is 40 m2/g or more, a half-width in the peak of (222) plane is 0.6° or less on an X-ray diffraction chart, and a color tone is navy blue (L is 30 or less in a Lab colorimetric system). A method for producing the indium tin oxide powder includes: coprecipitating an indium tin hydroxide by using a tin (Sn2+) compound under conditions in which pH is 4.0 to 9.3, and a temperature of a liquid is 5° C. or higher; and drying and calcining the indium tin hydroxide.
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