2009 Volume 50 Issue 6 Pages 1346-1350
Transfer thermal plasma of Ar was deposited on the surface of Na2O-SiO2 molten slag at about 1200 to 1350°C using a hybrid plasma furnace composed of transfer- and non-transfer plasma. The dependence of the transferred-type thermal plasma current on oxygen potential of the glass has been studied using an oxygen sensor made of solid electrolyte. During application of the transfer plasma with current less than 0.4 A, the oxygen partial pressure at the slag surface increased to 1×10−3 from 1×10−16 atm and that in the out gas of Ar was decreased from 1×10−4 to 1×10−12 or 1×10−14 atm. This paper describes a physical model aimed at studying the most dominant parameter for sheath forming from the above mentioned.
