화학공학소재연구정보센터
Korean Journal of Materials Research, Vol.9, No.8, 810-816, August, 1999
유성밀 분쇄에 의한 사문석과 활석의 물리적 특성변화
Physical Properties Change of Serpentine and Talc by Planetary Ball Mill
초록
유성밀로써 사문석과 활석을 분쇄시 X-ray 회절분석, FT-IR, DSC-TG, 입도분석 그리고 SEM관찰 등을 이용하여 결정조직과 물리적 특성변화를 조사하였다. 분쇄기간이 증가함에 따라 사문석과 활석 원시료의 결정피크가 점처 감소하여 120분 이상 분쇄시 비정질상으로 변하였으며 이와 같은 변화는 마그네슘 결정 조직의 무질서에 기인한다. 분쇄된 시료에서 나타나는 흡열반응의 피크는 원시료보다 낮은 온도에서 관찰되었다. 또한 불규칙한 모양의 원시료는 분쇄처리를 실시함에 따라 구형의 응집체로 변하였다.
The variations of crystalline structures and physical proerties of serpentine and talc mineral which was treated in a planetary ball mill, wre investigated by means of X-ray diffraction, FT-IR, DSC-TG, particle size analysis and SEM observation. The crystalline peaks of serpentine and talc in the XRD patterns were gradually reduced with the increase of grinding time and after 120 minutes turned into the amorphous phase, which is attributed to the disordering of the local structure around magnesium. The endothermic peaks for the ground serpentine and talc sample are observed at a considerably lower temperatures than that for the starting sample. A morphological change from the originally flat and irregular shape to spherically agglomerated particles was clearly observed.
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