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균일용액침전법에 의한 산화아연 제조공정에서 침전조건이 입자형상 및 입도분포에 미치는 영향
The Effect of Precipitation Conditions on the Shapes and Size Distributions of Zinc Oxide Particles Prepared by Homogeneous Precipitation
HWAHAK KONGHAK, October 1997, 35(5), 655-660(6), NONE
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Abstract
균일용액침전법으로 구형의 단분산 미세 산화아연 입자를 얻는 효과적인 공정을 개발하기 위한 실험적 조사를 행하였다. 생성되는 산화아연 입자는 R(HMTA의 농도/아연 농도)값이 작을수록, 침전액의 초기 pH가 낮을수록, 그리고 침전반응시간이 짧을수록 단분산에 가까운 구형의 미세입자가 얻어졌다. 짧은 침전반응 시간으로 인한 낮은 수율 문제를 해결하기 위한 방안으로 침전계에 적당량의 ethanol을 첨가하면 생성되는 산화아연 입자의 형태나 입도분포를 크게 변화시키지 않으면서 수율을 상당히 증대시킬 수가 있다는 것이 밝혀졌다.
Experimental research was performed to develop an effective process for manufacturing monodispersed spherical zinc oxide fine particles by homogeneous precipitation. As the R value(molar ratio of HMTA to zinc nitrate), initial pH of the precipitating solutions and precipitation time decrease, the zinc oxide particles produced have a narrower particle size distribution. Short precipitation times lead to low yields of zinc oxide, however, yields could be increased significantly, without serious change in particle shape or size distribution, by introducing ethanol into the precipitation solutions.
Keywords
References
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