WPAT, P.C.
Microwave dielectric ceramics and method for manufacturing the same
A method for manufacturing microwave dielectric ceramics has the steps of: mixing multiple A-metal compounds and sintering multiple A-metal compounds between 1350˜1450° C. for 2˜4 hr to make a first component Ba5+y(Nb1−kMnk)4O15; mixing and sintering multiple B-metal compounds to make a second component Ba1+zNb2O6; and mixing the first component Ba5+y(Nb1−kMnk)4O15, the second component Ba1+zNb2O6 and at least one sintering aid to make a third component (1−x)Ba5+y(Nb1−kMnk)4O5-xBa1+zNb2O6; wherein x, y, z and k are molar fractions and 0≦x<1, 0<y≦0.3, 0≦z≦0.3, 0≦k≦0.1; and the at least one sintering aid is 0.3˜3 wt %. The microwave dielectric ceramics of (1−x)Ba5+y(Nb1−kMnk)4O15-xBa1+zNb2O6 have superior microwave properties, low sintering temperature, simple chemical composition and manufacturing requirements applicable to low temperature co-sintered ceramic systems so no re-tooling is required.
Walsin Technology Corporation
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Hong Chung-Kai Huey-Ru Xi Huanfu Ruey-Tzeng
Wang Wen Chen Yao Zhou Chang