The microwave dielectric material

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PROBLEM TO BE SOLVED : To develop a microwave dielectric substance which is low in cost and high in performance, and can lower sintering temperature and bring a temperature coefficient close to zero. SOLUTION : The microwave dielectric substance is obtained by adding colemanite as a firing temperature lowering agent to a ceramic dielectric composition. Further, the microwave dielectric substance is obtained by adding BaLa2Ti3O10as a temperature coefficient improving agent to the ceramic dielectric composition. The sintering temperature can be lowered even by 100-150°C by selecting a homologous substance consisting essentially of AXR4Ti3+XO12+3X(A represents an alkaline earth metal element, R represents a rare earth element and composition ratio X is 0.5 COPYRIGHT : (C)2005, JPO&NCIPI