Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Microwave Synthesis of Alpha Alumina Platelets Using Flux Method

Flux법에 의한 알파 알루미나 판상체의 마이크로파 합성

  • Park, Seong-Soo (Division of Chemical Engineering, Pukyung National University) ;
  • Kim, Jun-Ho (Division of Chemical Engineering, Pukyung National University) ;
  • Kim, Sung-Wan (Department of Inorganic Materials Engineering, Pusan National University) ;
  • Lee, Sung-Hwan (Department of Inorganic Materials Engineering, Pusan National University) ;
  • Park, Jae-Hyun (Department of Inorganic Materials Engineering, Pusan National University) ;
  • Park, Hee-Chan (Department of Inorganic Materials Engineering, Pusan National University)
  • 박성수 (부경대학교 화학공학부) ;
  • 김준호 (부경대학교 화학공학부) ;
  • 김성완 (부산대학교 무기재료공학과) ;
  • 이성환 (부산대학교 무기재료공학과) ;
  • 박재현 (부산대학교 무기재료공학과) ;
  • 박희찬 (부산대학교 무기재료공학과)
  • Published : 2002.01.01
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Abstract

${\alpha}-Al_2O_3$ platelets were synthesized by microwave heating the two different powder mixtures of $Al_2(SO_4)_3+2Na_2SO_4$ and ${\gamma}-Al_2O_3+2Na_2SO_4$ using flux method. DTA-TG, XRD and SEM were used to investigate the effect of microwave on the formation of ${\alpha}-Al_2O_3$ platelets. In the case of the mixture of $Al_2(SO_4)_3+2Na_2SO_4$, the microwave heated sample was ${\alpha}-Al_2O_3$ platelets composed of aggregates with smaller particle size compared to the conventionally heated sample. In the case of the mixture of ${\gamma}-Al_2O_3+2Na_2SO_4$, the temperature to form ${\alpha}-Al_2O_3$ platelets by the microwave heating was lower than that by the conventional heating and the morphology of the microwave heated sample was similar to that of the conventionally heated sample except that the microwave heated sample had smaller particle size compared to the conventionally heated sample.

Flux법과 마이크로파 가열법으로 $Al_2(SO_4)_3+2Na_2SO_4$ 및 ${\gamma}-Al_2O_3+2Na_2SO_4$ 분말혼합물로부터 ${\alpha}-Al_2O_3$ 판상체(platelets)를 합성하였다. ${\alpha}-Al_2O_3$ 판상체 형성에 미치는 마이크로파의 영향을 조사하기 위하여 DTA-TG, XRD 및 SEM을 이용하였다. $Al_2(SO_4)_3+2Na_2SO_4$ 혼합물의 경우, 마이크로파로 가열된 시료는 재래식으로 가열된 시료에 비하여 입자의 크기가 작고 응집체로 구성된 ${\alpha}-Al_2O_3$ 판상체로 나타났다. ${\gamma}-Al_2O_3+2Na_2SO_4$ 혼합물의 경우, 마이크로파 가열에 의한 ${\alpha}-Al_2O_3$ 판상체 형성온도는 재래식 가열에 의한 형성온도 보다 낮았다. 또한 마이크로파로 가열된 시료의 형상은 재래식으로 가열된 시료의 형상과 유사하였다. 그러나 마이크로파로 가열된 시료는 재래식으로 가열된 시료에 비하여 입자의 크기가 작았다.

Keywords

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