Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Measurement of Coarse Particle Mass in Alumina Powders Using Wet Sieve Method

습식 체분리법을 이용한 알루미나분말 중의 조대입자 함량평가

  • 정상진 (요업기술원 세라믹${\cdot}$건재부) ;
  • 임형미 (요업기술원 신기능재료부) ;
  • 이승인 (요업기술원 세라믹${\cdot}$건재부) ;
  • 김영희 (요업기술원 세라믹${\cdot}$건재부) ;
  • 김수룡 (요업기술원 세라믹${\cdot}$건재부) ;
  • 조용익 (전남대학교 공업기술연구소)
  • Published : 2002.01.01
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Abstract

The effects of solid and dispersant concentration was investigated by wet-sieving method for knowing the amount of coarse particle in fine powders. In the work alumina powders, sodium hexametaphosphate and sodium polyacrylate were used for preparing slurry. It was confirmed that the coarse particle mass increased by increasing alumina concentration and decreasing dispersant concentration. With systematic measurements we know that the alumina powder and dispersant of one weight percent(1.0wt%) were proper quantity for coarse particle mass measuring, respectively. Sodium polyacrylate as dispersant showed higher coarse particle mass than sodium hexametaphosphate. The sieve mass was decreased according to increase of experiment number. Based on experiments it was considered that wet-sieving method is good tool for measuring a coarse particle mass in fine powders.

세라믹 분말을 이용하여 슬러리와 분산제의 농도에 따른 조대입자 함량평가에 대한 연구를 수행하였다. 시판용의 알루미나 분말을 조대입자 분리용 시료로 사용하였으며, 분산제로는 sodium hexametaphosphate와 sodium polyacrylate를 사용하였다. 알루미나 농도의 증가 및 분산제 농도의 감소에 따라 조대입자의 함량이 증가하였다. 슬러리 내의 시료농도가 1.0wt%이고, 시료에 대해 1.0wt%의 분산제를 첨가하였을 때 조대입자의 함량이 가장 작게 측정됨을 알 수 있었다. 고분자 분산제인 sodium polyacrylate를 사용하여 sodium hexametaphosphate보다 조대입자의 함량이 크게 측정되었다. 실험횟수가 증가함에 따라, 체의 질량이 일정한 비율로 감소하는 경향을 나타냈다. 조대입자의 함량을 알고 있는 임의의 슬러리를 제조하여 실험을 실시한 결과, 본 연구에서 사용한 습식 체분리 방법은 조대입자 함량평가에 적합한 것으로 사료된다.

Keywords

References

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