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Progress in Plasma Processing of Materials, 1997

ISBN:
1-56700-093-2 (Print)

Electrical and Thermal Conductivities and Enthalpy of Air Plasma Contaminated with Fe, Ca, Mg or H20 Vapour

Y. Tanaka
Department of Electrical Engineering, Nagoya University, JAPAN

Y. Yokomizu
Department of Electrical Engineering, Nagoya University, JAPAN

M. Kato
Department of Electrical Engineering, Nagoya University, JAPAN

T. Matsumura
Department of Electrical Engineering, Nagoya University, JAPAN

K. Shimizu
Matsushita Electric Works, Ltd, JAPAN

S. Takayama
Matsushita Electric Works, Ltd, JAPAN

T. Okada
Matsushita Electric Works, Ltd, JAPAN

Abstract

Theoretical calculation was carried out to derive electrical and thermal conductivities and enthalpy of air plasma contaminated with either Fe, Ca, Mg or H20 vapour at a pressure of 100 kPa in temperature range from 2500 to 25000 K. At temperatures below 10000 K, the presence of Fe, Ca or Mg vapours enhances the electrical conductivity σ of air plasma drastically, whilst that of H20 vapour decreases σ On the other hand, the thermal conductivity κ and the enthalpy h of air plasma decrease with an increase in contamination of Fe, Ca or Mg vapours, while κ and h rise with a rise of contamination of H20 vapour.