Abstract
Pb((Mg1/3Nb2/3)0.6(Fe1/2Nb1/2)0.4)O3 (PMFN) perovskite relaxor ferroelectric ceramics produced by reaction-sintering process were investigated. Without any calcination, the mixture of PbO, Mg(NO3)2, Fe(NO3)3 and Nb2O5 was pressed into pellets and sintered directly. PMFN ceramics of 100% perovskite phase were obtained. Density of 7.84 g/cm3 (95% of theoretical value) was obtained after sintered at 1250°C for 2 h. Grain sizes of 3–6 μm were formed after 2 h sintering at 1150–1250°C. Dielectric constant at room temperature under 10 kHz reaches 22400 after sintered at 1250°C for 2 h.
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