한국분말야금학회:학술대회논문집 (Proceedings of the Korean Powder Metallurgy Institute Conference)
- 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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- Pages.433-434
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- 2006
Preparation and Characterization of Monosized Germanium Particles by Pulsated Orifice Ejection Method
- Masuda, Satoshi (Department of material processing, Graduate school of Tohoku University) ;
- Takagi, Kenta (Department of material processing, Graduate school of Tohoku University) ;
- Dong, Wei (Micropowder Research Institute Inc.) ;
- Kawasaki, Akira (Department of material processing, Graduate school of Tohoku University)
- 발행 : 2006.09.24
초록
Monosized germanium micro particles are prepared by a newly developed Pulsated Orifice Ejection Method. The obtained particles are categorized into two kinds of the microstructures as refined and coarse ones. The morphological difference is estimated to be determined by the undercooling level during nucleation. Actually, the increase in the temperature of the melt was effective in coarsening the microstructure, because the temperature of the melt intensely relates to the undercooling level. The transition temperature of coarse and refined microstructures is found to be 1300-1350K. Furthermore, a triggered nucleation could improve the crystallinity of the particles in the short separation.