Abstract
Abstract A 30 kW inductively coupled argon–hydrogen plasma was investigated to assess the feasibility of plasma flash evaporation of zirconia. The evaporation time of zirconia was estimated to be 130 and 560 μs for spherical particles with radii of 6 and 12.5 μm, respectively. The plasma temperature in excess of 7000 K as inferred from spectroscopic measurements allows for the existence of zirconia vapour. Mie scattering of laser light yielded evidence that zirconia particles with a maximum diameter of 12 μm could be completely vaporised at a rate of 200 mg min −1 , if the hydrogen content of the argon–hydrogen plasma was sufficiently high.
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