| 摘要 |
PURPOSE:To obtain a porcelain composition exhibiting stable characteristics having small temperature-dependency by adding calcium titanate to a composition composed of magnesium lead tungstate, lead titanate and nickel lead niobate. CONSTITUTION:PbO, MgO, WO3, TiO2, NiO and NbO5 each having a purity of >=99.9wt.% are mixed with each other at prescribed ratios and the mixture is calcined, crushed and dried to obtain a threecomponent composition (A) of formula (x+y+z=1). The composition A is incorporated with (B) <=30wt.% of CaTiO3 to obtain the objective porcelain composition. |
