| 摘要 |
PURPOSE:To improve uniform dispersibility and thermal stability of a colorant without impairing purity and particle size being the feature of a fine ceramic raw material by utilizing the integral admixture of base material and the colorant as the colored ceramic raw material. CONSTITUTION:Base material (e.g., Y2O3, partially stabilized ZrO2) and a colorant (e.g., NiO) and if necessary, a dispersion auxiliary are sufficiently mixed and this mixture is dried and thereafter calcined. The calcined material is pulverized and regulated to particle diameter close to submicron. This particle diameter is almost equal to the particle diameter of the base material. Then this powder is dried and thereafter disintegrated to obtain an intermediate raw material. In this case, dispersibility may be enhanced by repeatedly performing the stages from calcination to drying. The above intermediate raw material is formed as an integral material wherein the colorant is incorporated in the particles of the base material. Then this intermediate raw material is mixed with the base material and thereafter this mixture is calcined, pulverized, dried and disintegrated in the same stages as the above-mentioned stages to obtain the colored ceramic raw material. |
