Abstract
Oxide doping and B-site oxide mixing route are superior in synthesizing complex perovskite structure ferroelectric ceramics, in which the oxide-doped Pb(Fe1/4Sc1/4Nb1/2)O3 (PFSN) ceramics exhibit phase-pure rhombohedral perovskite structure, high relative density and excellent dielectric properties. The MnO2- and Li2CO3-doped PFSN ceramics exhibit large pyroelectric coefficient, being 518.9 and 578.8μC/Km2 at room temperature, respectively. The calculated pyroelectric figures of merit Fd and Fv exhibit excellent frequency stability and maintain almost stable within 100–2000Hz. The pyroelectric coefficient and the calculated pyroelectric figures of merit increase greatly with the increase of temperature, which deserves further research to improve their temperature stability. Such investigations reveal that high-performance pyroelectric materials can be prepared by oxide doping via the B-site oxide mixing route in the synthesis of PFSN-based ceramics.
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