| 摘要 |
PURPOSE:To obtain the title composition for ceramic capacitors of high dielectric constant with its small change with temperature by sintering calcined powder prepared by adding, as subcomponent, ZnO at an amount within a specified range to a main component composition falling within a specified composition range in a specific three-component system. CONSTITUTION:A calcined powder is prepared by adding 0.01-10wt.% of ZnO as subcomponent to a main component composition falling within a composition range surrounded by the six points given by the table including straight lines connecting these respective points in the three-component composition diagram when a three-component composition made up of magnesium lead tangstenate, lead titanate and nickel lead niobate is expressed by the formula (x+y+z=1.00). This powder is then sintered at 1000-1150 deg.C to obtain the objective porcelain composition. This composition is suitable for producing ceramic capacitors (esp. laminated ones) having excellent electrical properties, i.e., high in dielectric constant with its small change with temperature. |
