| 摘要 |
PURPOSE: Provided is a method for preparing ceramic powder(Y2O3, Al2O3, TiO2, AlN, etc.) for plasma spraying by using non-aqueous solvent without addition of binder and dispersant. CONSTITUTION: The ceramic powder for plasma spraying is prepared by the following steps of: preparing a ceramic slurry containing 40-60wt.% of ceramic powder based on Y2O3, Al2O3, TiO2 or AlN, and 0.1-3.0wt.% of non-aqueous solvent such as ammonium salt or alcohol(ethanol and/or isopropyl alcohol), wherein the ceramic powder is dispersed by non-aqueous solvent, NH4OH, forming an electric double layer due to pH control without addition of binder or dispersant; spray-drying the slurry to get powder; thermal treating spray-dried powder(10-100micrometer) at 800-1600deg.C for 1-10hrs, wherein the thermal treating is performed in N2 or Ar atmosphere in case that the ceramic powder is aluminum nitride or nitride.
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