Effects of Negative Ions in Aqueous Ti Solution on Formation of Ultrafine TiO_2 PoWder by Low Temperature Homogeneous Precipitation : Semiconductors
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概要
- 論文の詳細を見る
Ultrafine crystalline TiO_2 powder was prepared by homogeneous precipitation by heating aqueous TiOCl_2 solution below 70℃. The TiO_2 powder was formed even at room temperature. By spontaneous hydrolysis of the aqueous TiOCl_2 solution, all the precipitates were completely crystalized in the rutile phase. These, however, were transformed into the anatase phase by adding more TiOSO_4 solution to the aqueous TiOCl_2 solution. The formed secondary particles consisted of needle-shaped, spherical and mixed primary particles corresponding to the rutile, anatase and mixed phases, respectively. It seems that the formation and phase determination of crystalline TiO_2 powder during the precipitation may be affected by capillary pressure. This pressure probably depends on the shape of the primary particles.
- 社団法人応用物理学会の論文
- 2001-12-15
著者
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Kim Sun-jae
Department Of Advanced Materials Engineering Sejong University
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Park Sung
Department Of Anesthesia And Pain Medicine School Of Medicine Pusan National University
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Park Sung
Department Of Inorganic Materials Engineering Myongji University
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