Micro-wave dielectric composite composition

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Various high quality microwave dielectric composite compositions are prepared by replacing a part of Ba, La or Ti with another element in a dielectric material represented by BanLa4Ti3+nO12+3n. A first embodiment thereof comprises a ceramic composition represented by (Ba1-xAx)nLa4Ti3+nO12+3n, wherein A is an alkaline earth metal element except Ba, and 0.5