Abstract

Ba_0.85Ca_0.15Zr_0.1Ti_0.9O₃ (BCZT) powders were prepared by sol-gel process followed by calcining at different temperatures varying from 600°C to 950°C, and the BCZT ceramics were then prepared using the as-synthesized powders. The effect of calcining temperature on structure, dielectric properties and ferroelectric properties of BCZT ceramics were studied. Impurity was observed in powders calcined at 600°C, and single-phase perovskite structure was obtained when calcining temperature increased to 650°C, which was significantly lower than that of the solid-state reaction. The high-density ceramics with homogenous microstructure were obtained by sintering at 1300°C for 2 h. The dielectric constants as a function of measuring temperature exhibited a diffuse phase transition peak. With the increase of calcining temperature, the slimmer P–E loops were obtained, and the BCZT ceramic calcined at 950°C exhibits a relatively high dielectric constant (ε_r = 2013) and low dielectric loss (tan δ = 0.020) at 1 kHz and room temperature.

中文翻译：

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煅烧温度对溶胶-凝胶法合成Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 O 3陶瓷的结构及介电和铁电性能的影响

抽象的

Ba _0.85 Ca _0.15 Zr _0.1 Ti _0.9 O ₃（BCZT）粉末通过溶胶-凝胶工艺制备，然后在600°C至950°C的不同温度下煅烧，然后使用合成后的粉末制备BCZT陶瓷。研究了煅烧温度对BCZT陶瓷结构，介电性能和铁电性能的影响。在600℃下煅烧的粉末中观察到杂质，并且当煅烧温度升高到650℃时获得单相钙钛矿结构，这显着低于固态反应的钙钛矿结构。通过在1300℃下烧结2小时获得具有均匀微观结构的高密度陶瓷。作为测量温度的函数的介电常数表现出扩散的相变峰。随着煅烧温度的升高，获得了更细的PE环，ε _{- [R}  = 2013），并在1kHz和室温低的介电损耗（tanδδ= 0.020）。