Abstract Yttrium (Y3+) doped barium zirconate titanate, (Ba1-xY2x/3)(Zr0.20Ti0.80)O3; BYZT ceramics with varying x (0 = x ≤ 0.10) were prepared by the solid-state reaction method. These samples were analyzed by X-ray diffraction (XRD) and the XRD patterns were fitted using the Rietveld refinement. The local structural changes of the BYZT ceramics were investigated by synchrotron X-ray absorption spectroscopy. The results showed that an increase in the x content in the BYZT lattice structure significantly affected the phase transition behavior and the local structure around the Ti absorbing atoms, which corresponds with the phase transition from a tetragonal to a cubic structure. SEM images showed a uniform and highly dense microstructure with increasing x values. The optical band gap (Egap) values measured from the UV–visual diffuse reflectance spectra, showed a decrease from ~3.55 eV to ~2.90 eV with increasing values of x. The modified Curie-Weiss law showed that a normal ferroelectric phase transition is observed in the unmodified BZT ceramic and as the concentration of x increased, it induces diffuseness in the phase transition behavior. The largest dielectric constant (er = 13,200), the highest recoverable energy-storage density (Wrec = 1.76 J/cm3) with an excellent energy storage efficiency (η = 91%) under a lower electric field of 50 kV/cm and lowest dielectric loss (tanδ = 0.01) were found in the composition of Ba0.98Y0.01337Zr0.2Ti0.8O3 (x = 0.02 mol.%).

中文翻译：

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(Ba1-Y2/3)(Zr0.20Ti0.80)O3陶瓷微晶结构的结构、光学和电学性能

摘要 钇(Y3+)掺杂锆钛酸钡，(Ba1-xY2x/3)(Zr0.20Ti0.80)O3；通过固相反应法制备了具有不同 x (0 = x ≤ 0.10) 的 BYZT 陶瓷。通过 X 射线衍射 (XRD) 分析这些样品，并使用 Rietveld 精修拟合 XRD 图案。通过同步辐射X射线吸收光谱研究了BYZT陶瓷的局部结构变化。结果表明，BYZT 晶格结构中 x 含量的增加显着影响了相变行为和 Ti 吸收原子周围的局部结构，这与从四方结构到立方结构的相变相对应。随着 x 值的增加，SEM 图像显示出均匀且高度致密的微观结构。从紫外可见漫反射光谱测量的光学带隙 (Egap) 值随着 x 值的增加从~3.55 eV 减少到~2.90 eV。修正的居里-魏斯定律表明，在未改性的 BZT 陶瓷中观察到正常的铁电相变，随着 x 浓度的增加，它会引起相变行为的扩散。最大的介电常数 (er = 13,200)，最高的可恢复储能密度 (Wrec = 1.76 J/cm3)，在 50 kV/cm 的较低电场和最低的介电常数下具有出色的储能效率 (η = 91%)在 Ba0.98Y0.01337Zr0.2Ti0.8O3 (x = 0.02 mol.%) 的组成中发现损失 (tanδ = 0.01)。修正的居里-魏斯定律表明，在未改性的 BZT 陶瓷中观察到正常的铁电相变，随着 x 浓度的增加，它会引起相变行为的扩散。最大的介电常数 (er = 13,200)，最高的可恢复储能密度 (Wrec = 1.76 J/cm3)，在 50 kV/cm 的较低电场和最低的介电常数下具有出色的储能效率 (η = 91%)在 Ba0.98Y0.01337Zr0.2Ti0.8O3 (x = 0.02 mol.%) 的组成中发现损失 (tanδ = 0.01)。修正的居里-魏斯定律表明，在未改性的 BZT 陶瓷中观察到正常的铁电相变，随着 x 浓度的增加，它会引起相变行为的扩散。最大的介电常数 (er = 13,200)，最高的可恢复储能密度 (Wrec = 1.76 J/cm3)，在 50 kV/cm 的较低电场和最低的介电常数下具有出色的储能效率 (η = 91%)在 Ba0.98Y0.01337Zr0.2Ti0.8O3 (x = 0.02 mol.%) 的组成中发现损失 (tanδ = 0.01)。