| 摘要 |
In a sealed enclosure 2, previously purged and kept at a slight overpressure, a reactive gas is passed through an annular plasma produced by a microwave torch 1; then, by means of gas jets 39, the reaction products are cooled on leaving this plasma so as to obtain a fine powder collected by a filter 3. Application to the production of powders of refractory materials, metallic oxides or metals. <IMAGE>
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