Method for making ultra-fine ceramic particles
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMasahiro Ogawa, Susumu Abe
Life of this patent
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Abstract
A method for making ultra-fine ceramic particles, in which metal powder constituting a portion of the ultra-fine ceramic particles intended for production is injected at a rate of not less than 70 grams per minute into a plasma jet so that the metal powder is vaporized. The vaporized metal powder is then mixed with a reactive gas, which includes an element consituting the other portion of the ultra-fine ceramic particles, filled in the surrounding area of the plasma jet, and thereby the vaporized metal powder and the reactive gas produce a synthetic reaction. The ultra-fine ceramic particles are produced continuously because of the reaction flame.
Claims10
A method for producing ultra-fine ceramic particles which comprises the steps of:
- forming a plasma jet in a reaction gas atmosphere containing an element constituting a portion of the intended ultra-fine ceramic particles,
- injecting a metal powder constituting a remaining portion of said intended ultra-fine ceramic particles into said plasma jet at a rate of not less than 70 grams per minute to vaporize said metal powder by the heat of said plasma jet and to react the resulting vaporized metal with said element contained in said reaction gas atmosphere for synthesizing said intended ultra-fine ceramic particles, and
- gathering the resulting ultra-fine ceramic particles.
Dependencies are inferred from the claim text.