Fabrication and electrical properties of textured Ba(Zr0.2Ti0.8)O3–(Ba0.7Ca0.3)TiO3 ceramics using plate-like BaTiO3 particles as templates
Fabrication and electrical properties of textured Ba(Zr0.2Ti0.8)O3–(Ba0.7Ca0.3)TiO3 ceramics using plate-like BaTiO3 particles as templates
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DOI：
10.1007/s10854-014-1804-7
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发表时间：
2014-02
期刊：
影响因子：
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通讯作者：
Guoxin Hu;Bei Xu;Xiaobing Yan;Jinjin Li;F. Gao;Zheng-tang Liu;Yong Zhang;Huajun Sun
中科院分区：
文献类型：
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作者：
Guoxin Hu;Bei Xu;Xiaobing Yan;Jinjin Li;F. Gao;Zheng-tang Liu;Yong Zhang;Huajun Sun
以片状BaTiO_3(BT)颗粒为模板，制备了具有晶粒取向的BaTiO_3-(Ba0.7Ca0.3)_2O_3(BZT-BCT)陶瓷。研究了烧结温度和保温时间对织构BZT-BCT陶瓷微观结构和电性能的影响。结果表明，获得了取向因子优于0.5的织构陶瓷。织构的BZT-BCT陶瓷具有三方和四方结构。晶粒呈阶梯状生长，其生长机制为多核多层生长。随着保温时间的延长，BZT-BCT陶瓷的T_r-T和T_c向高温方向移动。织构结构改善了介电、压电性能，削弱了介电弛豫特性。当BZT-BCT陶瓷在1500℃下烧结20h时，其最大压电系数可达350pC/N。
Plate-like BaTiO3(BT) particles were used as templates to fabricate grain-oriented Ba(Zr0.2Ti0.8)O3–(Ba0.7Ca0.3)TiO3(BZT–BCT) ceramics. The effects of the sintering temperature and the soaking time on the microstructure and electrical properties of the textured BZT–BCT ceramics were investigated. The results show that textured ceramics were obtained with orientation factor better than 0.5. The textured BZT–BCT ceramics have rhombohedral and tetragonal structures. Terrace morphology can be observed in the grains and the mechanism of grain growth is multi-nucleation multilayer growth. The TR–Tand TCof BZT–BCT ceramics shift to higher temperature as the soaking time increases. Textured structures improve the dielectric, piezoelectric properties, and weaken the dielectric relaxor characteristics. When BZT–BCT ceramics sintered at 1,500 °C for 20 h, the maximum piezoelectric coefficient of 350 pC/N can be obtained.