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송기창(Ki Chang Song),김종휘(Jong Huy Kim),성재석(Jae Suk Sung) 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.3
SnO₂ powder was prepared by calcination of the stannic acid precipitated from SnCl₄· 5H₂O aqueous solution by the precipitation method. The effects of calcination temperature and precipitation pH were investigated on the properties of SnO₂ powder. The stannic acid showed the decrease of specific surface area due to the release of absorbed water and structural water with the increase of calcination temperature and was crystallized to SnO₂ powders at 600 ℃, which were composed of very fine particles with 0.04-0.05 ㎛ in diameter. On the other hand, the variation of precipitation pH in 4-12 pH range did not show a big difference in the specific surface area and particle size of SnO₂ powders.
미립자공학,유동층,고분자,재료(무기, 유기) : Sol-Gel법에 의한 Perovskite-Type Oxide(La(1-x)SrxCo(1-y)FeyO(3-δ)) 코팅용액의 제조
박자룡 ( Ja Ryong Park ),이동일 ( Dong Il Lee ),정상혁 ( Sang Hyeok Jung ),김태환 ( Tae Hwan Kim ),성재석 ( Jae Suk Sung ),송기창 ( Ki Chang Song ) 한국화학공학회 2005 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.43 No.6