ABSTRACT A series of materials of the composition Ba0.7Sr0.3ZrxTi(1 − x)O3 (BSZT), where x = 0.00, 0.01, 0.02 and 0.03, were synthesised through the sol–gel method whereupon the manifestations of partial substitution of Ti4+ by Zr4+ on the structural and dielectric behaviour of Ba0.7Sr0.3TiO3 (BST) were studied. X-ray diffraction patterns of all samples showed the development of a single-phase crystalline perovskite structure. The dielectric behaviour of the ceramic samples has been studied in detail in the frequency range 10 Hz to 1 MHz at room temperature, and as a function of increase in temperature. The sample with 2% Zr recorded the highest dielectric constant. The dielectric loss values for all the BSZT compositions are remarkably low, tan δ = 0.021∼0.026 at 1 MHz, in contrast to the literature reports. It is observed that small amount of Zr doping on BST, where 0 < x ≤ 0.03 results in the enhancement of dielectric constant while decreasing the bulk density and dielectric loss.

中文翻译：

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低损耗掺锆钛酸锶钡材料的合成、表征及介电性能

摘要 通过溶胶-凝胶法合成了一系列组成为 Ba0.7Sr0.3ZrxTi(1 − x)O3 (BSZT) 的材料，其中 x = 0.00、0.01、0.02 和 0.03，由此表现出 Ti4+ 的部分取代。通过Zr4+对Ba0.7Sr0.3TiO3(BST)的结构和介电行为进行了研究。所有样品的 X 射线衍射图都显示出单相晶体钙钛矿结构的发展。陶瓷样品的介电行为在室温下 10 Hz 至 1 MHz 的频率范围内进行了详细研究，并作为温度升高的函数。含有 2% Zr 的样品记录了最高的介电常数。与文献报道相反，所有 BSZT 组合物的介电损耗值都非常低，在 1 MHz 时 tan δ = 0.021∼0.026。