Korean Chemical Engineering Research

  • 제48권5호
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  • Pages.627-631
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  • 2010
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  • 0304-128X(pISSN)
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  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
권호 표지

금속 불화물 첨가제가 α-알루미나 입자생성에 미치는 영향

Effect of Metal Fluoride on the Formation of α-Alumina Particles

  • 서금석 ((주)제이피에스 마이크로텍) ;
  • 이상근 ((주)제이피에스 마이크로텍) ;
  • 안병현 (부경대학교 신소재공학부) ;
  • 주창식 (부경대학교 화학공학과) ;
  • 홍성수 (부경대학교 화학공학과) ;
  • 박성수 (부경대학교 공업화학과) ;
  • 이근대 (부경대학교 공업화학과)
  • 투고 : 2010.04.18
  • 심사 : 2010.05.04
  • 발행 : 2010.10.31
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초록

질산 알루미늄과 암모니아 용액을 출발물질로 하고 또한 금속 불화물을 첨가제로 사용하여 $\alpha$-알루미나 입자를 침전법으로 제조하였다. 이 때 제조과정에서 사용된 용매의 영향과 $AlF_3$, $CaF_2$, $MnF_2$ 등의 3 가지 금속 불화물 첨가제가 $\alpha$-알루미나로의 상전이 온도, 입자 크기 및 형태 등에 미치는 영향에 대해 조사하였다. $\alpha$-알루미나 제조시 사용된 용매는 상전이 온도에는 큰 영향을 미치지 않는 반면 입자 크기에 영향을 미쳤다. 첨가제 조성에 따라 $\alpha$-알루미나 상전이 온도가 차이가 났으나($AlF_3(800^{\circ}C)$ < $MnF_2(900^{\circ}C)$ < $CaF_2(950^{\circ}C)$), 첨가제를 사용하지 않은 경우($1,100^{\circ}C$)보다는 모두 상전이 온도가 낮음을 알 수 있었다. 3 가지 첨가제를 사용한 경우 모두 판상의 $\alpha$-알루미나 입자들이 얻어졌으나, 그 중 $MnF_2$를 첨가한 경우에 가장 작은 크기의 $\alpha$-알루미나 입자들이 생성되었다.

$\alpha$-Alumna particles were prepared by a precipitation method with metal fluoride additive. Aluminum nitrate and ammonia solution were used as starting materials. $AlF_3$, $CaF_2$, and $MnF_2$ were utilized as additives. The effects of precipitation solvent and metal fluoride on the phase transformation temperature, size and morphology of $\alpha$-alumna particles were investigated. The solvent for precipitation did not affect the phase transformation temperature, while it influenced the size of $\alpha$-alumna particles. The phase transformation temperature to $\alpha$-alumna was reduced by addition of metal fluoride and was different with metal cation in metal fluoride ($AlF_3(800^{\circ}C)$ < $MnF_2(900^{\circ}C)$ < $CaF_2(950^{\circ}C)$). The addition of each of three metal fluorides led to the formation of platelike particles and, among the three additives, $MnF_2$ additive resulted in the formation of relatively small particle.

키워드

참고문헌

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