Abstract (1– x )Ba(Zr 0.2 Ti 0.8 )O 3 - x Ba 0.7 Ca 0.3 FeTaO 5 (abbreviated as BXT– x , where x = 0.4, 0.5, 0.8 and 1) ceramics were successfully prepared through a conventional solid-state reaction method. The evolutions of structure and surface morphology with change of the component and the competitive growth of perovskite structure and tungsten bronze structure were investigated. BXT–1 ceramic is composed of rod-like grains with high aspect ratio (20–40) of tungsten bronze structure. Dielectric anomaly accompanied by frequency dispersion was observed in all BXT– x ceramics. We concluded that the dielectric relaxation in the ceramics is derived from electron hopping in the dipole composed of Fe 2+ and Fe 3+ and XPS data confirmed the coexistence of Fe 2+ and Fe 3+ in the ceramics. Moreover, the sintering atmosphere plays an important role in the competitive growth of perovskite structure and tungsten bronze structure.

中文翻译：

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(1– x )Ba(Zr 0.2 Ti 0.8 )O 3 - x Ba 0.7 Ca 0.3 FeTaO 5 陶瓷中具有高纵横比的棒状晶粒和钙钛矿和钨青铜结构的竞争性生长调节

摘要 (1– x )Ba(Zr 0.2 Ti 0.8 )O 3 - x Ba 0.7 Ca 0.3 FeTaO 5 (缩写为BXT– x , 其中x = 0.4, 0.5, 0.8 and 1)状态反应法。研究了结构和表面形貌随成分变化的演变以及钙钛矿结构和钨青铜结构的竞争生长。BXT-1陶瓷由具有高纵横比（20-40）的钨青铜结构的棒状晶粒组成。在所有 BXT-x 陶瓷中都观察到了伴随频率色散的介电异常。我们得出结论，陶瓷中的介电弛豫源于由 Fe 2+ 和 Fe 3+ 组成的偶极子中的电子跳跃，XPS 数据证实了陶瓷中 Fe 2+ 和 Fe 3+ 的共存。而且，