고활성 ITO (Indium-Tin Oxide) 나노 분말을 침전법으로 합성시의 공정 변수 및 존재하는 이온의 영향
Effect of Process Variables and exisisting Ions on Highly Active Nano-sized ITO Powders Prepared by Precipitation Method
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The objectives of this study were the development of a synthesis technique for highly active nano-sized ITO powder and the understanding of the reaction mechanisms of the ITO precursors. The precipitation and agglomeration phenomena in ITO and In₂O₃ precursors are very sensitive to reaction temperature, pH, and coexisting ion species. Excessive Cl- ion and Sn+⁴ ions had a negative effect an synthesizing highly active powders. However, with a relevant stabilizing treatment the shape and size of ITO and In₂O₃precursors could be controlled and high density sintered products of ITO were obtained. By applying the reprecipitation process (or stabilization technique), highly active ITO and In₂O₃ powders were synthesized. Sintering these powders at 1500℃ for 5 hours produced 97% dense ITO bodies.
Abstract
The objectives of this study were the development of a synthesis technique for highly active nano-sized ITO powder and the understanding of the reaction mechanisms of the ITO precursors. The precipitation and agglomeration phenomena in ITO and In₂O₃ precursors are very sensitive to reaction temperature, pH, and coexisting ion species. Excessive Cl- ion and Sn+⁴ ions had a negative effect an synthesizing highly active powders. However, with a relevant stabilizing treatment the shape and size of ITO and In₂O₃precursors could be controlled and high density sintered products of ITO were obtained. By applying the reprecipitation process (or stabilization technique), highly active ITO and In₂O₃ powders were synthesized. Sintering these powders at 1500℃ for 5 hours produced 97% dense ITO bodies.
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