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Chen, Caiyun; Liang, Ruihong; Liu, Zhen; Yan, Shiguang; Nie, Xin; Zhou, Zhiyong; Dong, Xianlin
Materials letters, 02/2017, Letnik: 189Journal Article
The electrocaloric effect has been investigated in Sr and Nb co-doped Pb(Zr,Ti)O3 (PSNZT) ceramics synthesized by conventional solid state reaction. The coexistence of negative and positive electrocaloric effect was revealed in PSNZT ceramics. The electrocaloric response values of −0.38K at 80°C and 0.65K at 180°C were observed under an electric field of 1.5kV/mm. The corresponding electrocaloric coefficient values were calculated to be −0.25KmmkV−1 and 0.43KmmkV−1 respectively. The mechanism of the coexistence of negative and positive electrocaloric effect was discussed. •Sr and Nb co-doped Pb(Zr,Ti)O3 ferroelectric ceramics were synthesized by a solid-state reaction method.•Rare phenomenon of coexistence of negative and positive electrocaloric effect was found in Sr and Nb co-doped Pb(Zr,Ti)O3 ferroelectric ceramics.•High electrocaloric coefficient of −0.25KmmkV−1 and 0.43KmmkV−1 were obtained.•Reason for the coexistence of negative and positive electrocaloric effect was discussed.
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