Abstract
This work investigated the microwave dielectric properties of A-site substitution by rare earth La3+ in (Pb0.5Ca0.5) (Fe0.5Ta0.5)O3 (PCFT) system. A single perovskite phase was obtained only when the doping content was 2%. Suitable La3+ doping improved microwave dielectric performances. Excessive La3+ doping caused the formation of secondary phase, which resulted in the decreasing of permittivity ɛ r and quality factor Q f values. Especially, when the doping content is 2%-5%, permittivity ɛ r was above 75 and Q f values were 6 902–7 416 GHz.
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