Using Bi2O3 and MoO3 as raw materials, by adjusting the molybdenum-bismuth ratio and slurry pH, Bi2MoO6, Bi2Mo2O9 and Bi2Mo3O12 coexisted in pairs. Two materials with opposite signs of τf were selected to adjust the τf of the composite, and a near-zero τf value was developed. Microwave dielectric material.
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