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Received April 18, 2010
Accepted May 4, 2010
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금속 불화물 첨가제가 α-알루미나 입자생성에 미치는 영향
Effect of Metal Fluoride on the Formation of α-Alumina Particles
Geum-Suk Seo
Sang-Geun Lee
Byung-Hyun Ahn1
Chang-Sik Ju2
Seong-Soo Hong2
Seong-Soo Park3
Gun Dae Lee3†
(주)제이피에스 마이크로텍, 608-739 부산시 남구 용당동 산100 1부경대학교 신소재공학부, 608-739 부산시 남구 용당동 산100 2부경대학교 화학공학과, 608-739 부산시 남구 용당동 산100 3부경대학교 공업화학과, 608-739 부산시 남구 용당동 산100
JPS Micrortech, San 100, Yongdang-dong, Nam-gu, Busan 608-739, Korea 1Division of Material, Pukyong National University, San 100, Yongdang-dong, Nam-gu, Busan 608-739, Korea 2department of Chemical Engineering, Pukyong National University, San 100, Yongdang-dong, Nam-gu, Busan 608-739, Korea 3Department of Industrial Chemistry, Pukyong National University, San 100, Yongdang-dong, Nam-gu, Busan 608-739, Korea
gdlee@pknu.ac.kr
Korean Chemical Engineering Research, October 2010, 48(5), 627-631(5), NONE Epub 17 November 2010
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Abstract
질산 알루미늄과 암모니아 용액을 출발물질로 하고 또한 금속 불화물을 첨가제로 사용하여 α-알루미나 입자를 침전법으로 제조하였다. 이 때 제조과정에서 사용된 용매의 영향과 AlF3, CaF2, MnF2 등의 3 가지 금속 불화물 첨가제가 α-알루미나로의 상전이 온도, 입자 크기 및 형태 등에 미치는 영향에 대해 조사하였다. α-알루미나 제조시 사용된 용매는 상전이 온도에는 큰 영향을 미치지 않는 반면 입자 크기에 영향을 미쳤다. 첨가제 조성에 따라 α-알루미나 상전이 온도가 차이가 났으나(AlF3(800 ℃) < MnF2(900 ℃) < CaF2(950 ℃)), 첨가제를 사용하지 않은 경우(1,100 ℃)보다는 모두 상전이 온도가 낮음을 알 수 있었다. 3 가지 첨가제를 사용한 경우 모두 판상의 α-알루미나 입자들이 얻어졌으나, 그 중 MnF2를 첨가한 경우에 가장 작은 크기의 α-알루미나 입자들이 생성되었다.
α-Alumna particles were prepared by a precipitation method with metal fluoride additive. Aluminum nitrate and ammonia solution were used as starting materials. AlF3, CaF2, and MnF2 were utilized as additives. The effects of precipitation solvent and metal fluoride on the phase transformation temperature, size and morphology of α-alumna particles were investigated. The solvent for precipitation did not affect the phase transformation temperature, while it influenced the size of α-alumna particles. The phase transformation temperature to α-alumna was reduced by_x000D_
addition of metal fluoride and was different with metal cation in metal fluoride (AlF3(800 ℃) < MnF2(900 ℃) < CaF2(950 ℃)). The addition of each of three metal fluorides led to the formation of platelike particles and, among the three additives, MnF2 additive resulted in the formation of relatively small particle.
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References
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