Abstract The paper reports highest obtained dielectric constant for Ni-doped Lead Zirconate Titanate [PZT, Pb(Zr0.52Ti0.48)O3] ceramics. The Ni-doped PZT ceramic pellets were prepared via conventional solid-state reaction method with Ni content chosen in the range 0–20 at%. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy were employed to investigate the crystal structure of the prepared ceramics. The X-ray diffraction analysis indicated that the ceramic pellets had crystallized into tetragonal perovskite structure. A minute displacement of XRD peaks was detected in the diffraction spectra of Ni-doped PZT ceramic samples which when examined by size-strain plot (SSP) method revealed presence of homogenous strain that decreased with increase in concentration of Ni. In FTIR the maximum absorption at 597 cm−1, 608 cm−1, 611 cm−1, 605 and 613 cm−1 for Ni = 0, 5, 10, 15 and 20 at%, respectively, confirmed the formation of perovskite structure in all the compositions and the slight shift suggests decrease in cell size on doping. The values of dielectric constant (e′) & tanδ as a function of frequency and temperature were measured for the prepared ceramics and it revealed highest ever reported dielectric constant for Ni - doped PZT with Ni = 5 at%. The dielectric variation with temperature exhibited a diffused type ferroelectric–paraelectric phase transition for the doped samples. Also, the maximum dielectric constant value (e′max) decreased while the phase transition temperature increased with increase in doping concentration of Ni. The estimated activation energy of different compositions was found to increase from 0.057 to 0.068 eV for x = 0.00 to x = 0.20 in ferroelectric phase. The piezoelectric, ferroelectric and magnetic properties were also investigated.

中文翻译：

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Ni 掺杂的锆钛酸铅、Pb[(Zr0.52Ti0.48)(1-x) Nix]O3、陶瓷的更高介电常数

摘要 本文报道了掺镍锆钛酸铅 [PZT, Pb(Zr0.52Ti0.48)O3] 陶瓷的最高介电常数。Ni 掺杂的 PZT 陶瓷颗粒是通过传统的固态反应方法制备的，Ni 含量选择在 0-20 at% 的范围内。采用 X 射线衍射 (XRD) 和傅里叶变换红外 (FTIR) 光谱研究制备的陶瓷的晶体结构。X 射线衍射分析表明陶瓷颗粒已结晶成四方钙钛矿结构。在 Ni 掺杂的 PZT 陶瓷样品的衍射光谱中检测到 XRD 峰的微小位移，当通过尺寸应变图 (SSP) 方法检查时，表明存在均匀应变，该应变随着 Ni 浓度的增加而降低。在 FTIR 中，最大吸收在 597 cm-1、608 cm-1、Ni = 0、5、10、15 和 20 at% 的 611 cm-1、605 和 613 cm-1 分别证实了所有组合物中钙钛矿结构的形成，轻微的变化表明掺杂时电池尺寸减小。对制备的陶瓷测量了作为频率和温度函数的介电常数 (e') 和 tanδ 值，结果表明 Ni 掺杂 PZT 的介电常数最高，Ni = 5 at%。掺杂样品随温度的介电变化表现出扩散型铁电-顺电相变。此外，随着Ni掺杂浓度的增加，最大介电常数值（e'max）降低，而相变温度升高。发现对于 x = 0.00 到 x = 0，不同组合物的估计活化能从 0.057 eV 增加到 0.068 eV。20 处于铁电相。还研究了压电、铁电和磁性能。