Patent ID: 6916754

Claim:
A method, for producing the low-temperature sintered dielectric ceramic material having a composition of ABO 3 dielectric ceramic material where a 0.9 molar ratio or more lead is included in site A assuming the proportion of site B is 1, and at least one of tungsten and molybdenum is included, wherein the density of the dielectric ceramic material, after sintering, is 7.5 g/cm 3 or larger, and the combined content of tungsten and molybdenum is less than 0.098 mole to 1 mole of lead, which method comprises (1) preparing an auxiliary oxide that is made by adding the oxide of at least one of tungsten and molybdenum to lead oxide in proportion of: PbO x +(WO 3 y+MoO 3z) where x+y+z=1, 0.005<y+z<0.4 and y, z≧0; (2) adding 0.05 mol % to 6 mol % of said auxiliary oxide prepared in step (1) to a mixture of a stock material of low-temperature sintered dielectric ceramic material or calcination thereof that has a composition of ABO 3 dielectric ceramic material where 0.9 molar ratio or more lead is included in site A assuming the proportion of site B is 1; (3) mixing the material, followed by (4) forming and further sintering.