| 摘要 |
PURPOSE:To obtain the ceramic powder having a prescribed structure by calcining a mixture of a coprecipitated body produced from a mixed soln. contg. water soluble Zr and Ti salts, a mixture of Ti oxide with Mg oxide, etc., and a mixture of Ti oxide with Pb monoxide, etc. CONSTITUTION:A mixed soln. contg. Z mol. water soluble Zr salt and (a) mol. water soluble Ti salt (a=0.01Z-0.6Z) is prepd. The mixed soln. is mixed with a precipitate forming soln. and a produced coprecipitated body is calcined at 700-1,300 deg.C. A mixture of (b) mol. Pb monoxide with (b-X) mol. Ti oxide, X/e mol. Mg oxide and X/3 mol. Nb oxide (b=X-Y-a) is calcined. Powders of the resulting two kinds of calcined bodies are mixed with [(X+Y)-(a+b)] mol. Ti oxide and (1-b) mol. Pb monoxide, etc., and the mixture is calcined to obtain perovskite ceramic powder represented by the formula (where X=0.875-0.01, Y=0.813-0, Z=0.95-0, X+Y+Z=1, W=0-0.2 and M is Ca, Sr or Ba).
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