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High-quality-factor and low temperature coefficient of the resonant frequency Ca0.7Ti0.7La0.3Al0.3O3 ceramics had been prepared by the conventional solid-state reaction method,and their microwave dielectric properties had been investigated.Al2O3 、CaCO3、MnCO3、BaO and rare-earth oxide were selected as additive to adjust the microstructure and dielectric of Ca0.7Ti0.7La0.3Al0.3O3 ceramics.