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The effect of the sintering temperature was investigated in 0.75BiFeO3-0.25BaTiO3 lead-free piezoelectric ceramics. Undoped 0.75BiFeO3-0.25BaTiO3 ceramics were prepared by using a conventional ceramic process. When the sintering temperature was increased from 940 °C to 1,020 °C, the bulk density and the dielectric constant increased at first, reached their maximum values at 980 °C, and then decreased...
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