Development of an induction melting process for materials with low electrical conductivity or high melting point

Journal Article · Thu Apr 01 00:00:00 EST 1993 · Metallurgical Transactions, B (Process Metallurgy); (United States)

DOI:https://doi.org/10.1007/BF02659127· OSTI ID:6522526

Iwai, Kazuhiko; Sassa, Kensuke; Asai, Shigeo ^[1]; Tamaoki, Ryouji ^[2]

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1. Nagoya Univ. (Japan)
2. Terminal Print Group, Nagano (Japan)

A hybrid process combining a cold crucible and a nontransferred plasma has been proposed. By using this process, not only metals with a high melting point but also dielectric materials can be melted without contamination. Also, good homogeneity of alloying elements can be expected by using this process because of the induction mixing taking place in the molten charge. By using the hybrid process, silicon was melted and held with almost no contact with the crucible. A heat-transfer analysis taking account of the dependence of electrical conductivity on temperature was performed on a silicon charge as a semiconductor. The effects of operating parameters, such as magnetic flux density, radius of the charge, and frequency of the coil current, were studied on the equilibrium temperature at which the heat generation rate in a charge balances with the heat removal rate. The critical temperature over which induction heating is possible was theoretically derived and was compared with the value obtained in an experiment.

• OSTI ID: 6522526
• Journal Information: Metallurgical Transactions, B (Process Metallurgy); (United States), Vol. 24B:2; ISSN 0360-2141
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SEMICONDUCTOR MATERIALS
MELTING
SILICON
CONTAMINATION
ELECTRIC CONDUCTIVITY
HEAT TRANSFER
HYBRID SYSTEMS
PARAMETRIC ANALYSIS
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY TRANSFER
MATERIALS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SEMIMETALS
360101* - Metals & Alloys- Preparation & Fabrication
360601 - Other Materials- Preparation & Manufacture