Tin-doped oxide indium powder and its manufacture

スズドープ酸化インジウム粉とその製造方法

Abstract

PROBLEM TO BE SOLVED: To provide transparent conductive powder exhibiting higher conductivity in a high transparency region, and to provide a manufacturing method thereof not needing firing in a strong reducing atmosphere as in the past. SOLUTION: This tin-doped oxide indium powder comprises powder having an Sn content of 0.1 to 30 wt.% in terms of SnO2, a specific surface area of 15 m2/g or more, and grain sizes ranging from 10 to 30 nm, and exhibits specified color tone, crystallinity, volume solid resistivity, and zeta-potential. In this method, a bivalent soluble tin compound, in particular, is used for a starting tin material for doping, an ammonium carbonate is added to, and mixed with a mixed acidic liquid of the tin compound and an indium compound, thereby obtaining a coprecipitation hydroxide, which is fired in a nitrogen atmosphere while humidity is adjusted, and the fired material is pulverized to obtain powder. COPYRIGHT: (C)2000,JPO
(57)【要約】 【課題】 高い透明域において、より高い導電性を示す 透明導電性粉末を提供する。また、従来における強い還 元性雰囲気での焼成処理を不要とする好適な製造方法を 提供する。 【解決手段】 Sn含有量がSnO 2 換算で0.1〜3 0重量%で、15m 2 /g以上の比表面積を有し且つ1 0〜30nmの粒径範囲内の粉体からなり、特定された 色調、結晶性、体積固有抵抗率およびゼータ電位を示す スズドープ酸化インジウム粉体とする。また、ドープ用 出発スズ原料として特に2価の可溶性スズ化合物を用 い、これとインジウム化合物との混合酸性液にアンモニ ウム炭酸塩を添加・混合し、共沈水酸化物を得、窒素雰 囲気にて湿度調整しながら焼成処理を行い、焼成物を粉 砕することにより粉体を得る方法とする。

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