Dielectric relaxation and phase transition behavior of (1–x)Pb(Zn1/3Nb2/3)O3-xBaTiO3 binary solid solutions | Научно-инновационный портал СФУ

Dielectric relaxation and phase transition behavior of (1–x)Pb(Zn1/3Nb2/3)O3-xBaTiO3 binary solid solutions

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1016/j.ceramint.2018.07.069

Ключевые слова: Dielectric relaxation, Phase transition, Polarization mismatch, “U”-shaped variation

Аннотация: Dielectric relaxation and phase transition behaviors in (1–x)Pb(Zn1/3Nb2/3)O3-xBaTiO3 (PZN-BT) binary solid solutions have been systematically studied in this paper. All the compositions display a pure pseudo-cubic perovskite structure. As the BT contents increase from 10 mol% to 70 mol%, the phase transition peak becomes broader and broader, accompanying with decreases of ɛm (the maximum dielectric permittivity) and Tm (the temperature corresponds to the ɛm). Nevertheless, an abnormal increase of ɛm and Tm occurs when the BT contents exceeds 70 mol%, forming a “U” shaped curve of the compositional dependence of ɛm and Tm. Moreover, it is indicated from the new glass model fitting results that the characteristic parameter p, which represents the degree of relaxation, also shows a similar “U” shaped variation curve. Similarly, as shown in polarization-electric field loops, both remnant polarizations (Pr) and coercive fields (Ec) display the “U” shaped curve as the BT content changes from 10 mol% to 80 mol%. Finally, according to the similar variation of these key parameters mentioned above, a polarization mismatched model, which describes the destruction and reestablishment of the long range order arrangement in solid solutions composed of two kinds of ferroelectrics, is proposed to illustrate the underlying mechanism. In this PZN-BT system or other similar ABO3-type perovskite relaxors, the competition between the A-O and B-O coupling plays an important role to form the “U” shaped evolution of these key parameters. © 2018

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Издание

Журнал: Ceramics International

ISSN журнала: 02728842

Издатель: Elsevier Ltd

Авторы

  • Gao Qiang (Xi An Jiao Tong Univ, Elect Mat Res Lab, Key Lab, Minist Educ,Sch Elect & Format Engn, Xian 710049, Shaanxi, Peoples R China; Xi An Jiao Tong Univ, Sch Elect & Format Engn, Int Ctr Dielect Res, Xian 710049, Shaanxi, Peoples R China)
  • Hu Qingyuan (Xi An Jiao Tong Univ, Elect Mat Res Lab, Key Lab, Minist Educ,Sch Elect & Format Engn, Xian 710049, Shaanxi, Peoples R China; Xi An Jiao Tong Univ, Sch Elect & Format Engn, Int Ctr Dielect Res, Xian 710049, Shaanxi, Peoples R China)
  • Jin Li (Xi An Jiao Tong Univ, Elect Mat Res Lab, Key Lab, Minist Educ,Sch Elect & Format Engn, Xian 710049, Shaanxi, Peoples R China; Xi An Jiao Tong Univ, Sch Elect & Format Engn, Int Ctr Dielect Res, Xian 710049, Shaanxi, Peoples R China)
  • Gorev M.V. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia)
  • Chezganov D.S. (Ural Fed Univ, Sch Nat Sci & Math, Ekaterinburg 620000, Russia)
  • Vlasov E.O. (Ural Fed Univ, Sch Nat Sci & Math, Ekaterinburg 620000, Russia)
  • Zeng Huarong (Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China)
  • Zhao Luyang (Xi An Jiao Tong Univ, Elect Mat Res Lab, Key Lab, Minist Educ,Sch Elect & Format Engn, Xian 710049, Shaanxi, Peoples R China; Xi An Jiao Tong Univ, Sch Elect & Format Engn, Int Ctr Dielect Res, Xian 710049, Shaanxi, Peoples R China)
  • Cui Yu (Xi An Jiao Tong Univ, Elect Mat Res Lab, Key Lab, Minist Educ,Sch Elect & Format Engn, Xian 710049, Shaanxi, Peoples R China; Xi An Jiao Tong Univ, Sch Elect & Format Engn, Int Ctr Dielect Res, Xian 710049, Shaanxi, Peoples R China)
  • Xu Zhuo (Xi An Jiao Tong Univ, Elect Mat Res Lab, Key Lab, Minist Educ,Sch Elect & Format Engn, Xian 710049, Shaanxi, Peoples R China; Xi An Jiao Tong Univ, Sch Elect & Format Engn, Int Ctr Dielect Res, Xian 710049, Shaanxi, Peoples R China)
  • Wei Xiaoyong (Xi An Jiao Tong Univ, Elect Mat Res Lab, Key Lab, Minist Educ,Sch Elect & Format Engn, Xian 710049, Shaanxi, Peoples R China; Xi An Jiao Tong Univ, Sch Elect & Format Engn, Int Ctr Dielect Res, Xian 710049, Shaanxi, Peoples R China)

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