In_2O_3-Sn系白色導電粉の調製 [in Japanese] Preparation of Electro-conductive White Fine Powders Coated with In_2O_3-Sn Film [in Japanese]
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A novel method was developed for the preparation of white fine powders coated with ITO. Fine powders, such as TiO<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub>, previously coated with hydorlyzed Sn(OH)<sub>4</sub> film were homogeneously coated with a mixed hydroxide film of ITO composition by simultaneously adding a acidified metal chloride solution and ammonia water to maintain a suspension pH of around 7 at a temperature near 343K. After filtration and water rinsing, the powders were annealed at 773K for 1 hour to form a uniform ITO film. The range of the electro-conductivity of the prepared powders extended from several to tens Ω·cm. Well-coated ITO film exhibits sufficient resistivity to AGA grinding. Coupling agents, such as silane-type agents, remarkable effectiveness against aging deterioration the electro-conductivity of the powders.
- Jitsumu Hyomen Gijutsu
Jitsumu Hyomen Gijutsu 47(4), 338-344, 1996-04
The Surface Finishing Society of Japan