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Single-phase multiferroic BiFeO3 nanoparticles were synthesized by the sol–gel method. Their dielectric properties are investigated in the temperature range of 373–773K at frequencies 12.4–18GHz. Multiferroic BiFeO3 shows high dielectric loss and a strong positive temperature dependence of dielectric properties. The average real and imaginary permittivities of BFO increase from 15.5 and 5.5 to 21...
Dense SiO 2 ceramics with cristobalite phase were prepared by the solid state sintering route, and the microwave dielectric properties were evaluated. The dielectric constant (ɛ r ) and temperature coefficient of resonant frequency (τ f ) of the pure cristobalite ceramics showed little dependence on the sintering temperature. While, the Qf value increased significantly with...
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