Preparation of ultrafine powder of stabilized zirconia

Abstract

Abstract PURPOSE:To prepare ultrafine powder of stabilized zirconia, by jetting a mixture of an aqueous solution of a water-soluble Zr salt and at least one of water-soluble salts of Mg, Ca, and Y to plasma flame, heating and melting it. CONSTITUTION:The torch 1 for generating plasma equipped with the high-frequency coil 3 for producing plasma flame is set at the upper part of the container 6. While an auxiliary gas such as air, oxygen, nitrogen, argon, etc. is jetted to the interior of the tubular gas passage ring 2 in the torch 1, high-frequency voltage is applied to the high-frequency coil 3 to produce the high-temperature plasma flame 4. Simultaneously, an aqueous solution of a mixture of a water- soluble Zr salt such as Zr nitrate, sulfate, chloride, etc. and at least one stabilizer of water-soluble salts of Mg, Ca, and Y is jetted from the raw material feed pipe 5 in such a way that it is sprayed upon the plasma flame 4. The melted ZrO2 is quenched, atomized, ultrafine powder of stabilized ZrO2 is prepared and collected in the water tank 7.

Inventors

• 👤 Michio Uemura
• 👤 道夫 植村
• 👤 Masanao Tsukada
• 👤 塚田　正直
• 👤 Masaru Sato
• 👤 優 佐藤

Bibliographic Details