Patent ID: 7157396

Claim:
A method of production of a dielectric ceramic composition having: a main component including a dielectric oxide expressed by a composition formula {(Ca 1-x Me x )O} m .(Zr 1-y Ti y )O 2 , wherein a symbol Me showing the name of the element in the composition is at least one of Sr, Mg, and Ba, the symbols m, x, and y showing the molar ratio of the composition in the composition formula are 0.8≦m≦1.3, 0≦x≦1.00, 0≦y≦1.00, a first subcomponent including a V oxide, a second subcomponent including an Al oxide, a third subcomponent including an Mn oxide, and a fourth subcomponent having SiO 2 as a main component and including an oxide including at least one type selected from Mo (where M is at least one type of element selected from Ba, Ca, Sr, and Mg), Li 2 O, and B 2 O 3 , a ratio of the subcomponents with respect to 100 moles of the main component being: first subcomponent: 0 mole<first subcomponent<7 moles (however, value converting V oxide to V 2 O 5 ), second subcomponent: 0 mole<second subcomponent<15 moles (however, value converting Al oxide to Al 2 O 3 ), third subcomponent: 0 mole<third subcomponent<5 moles (however, value converting Mn oxide to Mn element), fourth subcomponent: 0 mole<fourth subcomponent<20 moles (however, value converted to oxide), the method of production of a dielectric ceramic composition having: a step of mixing at least part of other materials of subcomponents excluding at least one or both of the material of the third subcomponent and the material of the fourth subcomponent with starting materials prepared for obtaining the material of the main component so as to prepare a pre-reaction material, a step of causing the prepared pre-reaction material to react so as to obtain a reacted material, and a step of mixing with the obtained reacted material the materials of the subcomponents excluded when preparing the pre-reaction material to obtain a dielectric ceramic composition.