PbSrTiO ceramics noted PST with (x = 0, 10, 20, 30, 40, 50, 60, 70 and 100 %) were synthesized by hydrothermal method at 180 °C for 24 h. Pressure, temperature and pH of the environment are essential factors to obtain a pure phase. The effect of Pb substitution by Sr on the structural and dielectric properties was studied. Pure phases of perovskite structure without secondary phases were confirmed by X-ray diffraction analysis. Refinement of the spectra obtained using the Rietveld method revealed that the substitution leads to a transition from the quadratic phase (P4mm) to the pseudo-cubic phase (Pm m). The occurrence of functional bands was also verified by Raman spectroscopy at room temperature. Using a scanning electron microscope (SEM), the texture, morphology and microstructure of the PbSrTiO ceramics were observed. The study of dielectric properties was examined by impedance spectroscopy of dielectric measurements in the temperature range from 30 °C to 500 °C as a function of frequency, confirming the incorporation of Strontium and highlighting its influence on the Curie temperature (T), permittivity value (ε) and dielectric losses (tanδ).

中文翻译：

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低温水热合成 Sr 取代 Pb1-xSrxTiO3 陶瓷的结构、微观结构研究与介电性能之间的相关性

通过水热法在 180 °C 下合成 PbSrTiO 陶瓷（x = 0, 10, 20, 30, 40, 50, 60, 70 和 100 %）24 h。环境的压力、温度和pH值是获得纯相的重要因素。研究了Sr取代Pb对结构和介电性能的影响。通过X射线衍射分析证实了钙钛矿结构的纯相，没有第二相。使用 Rietveld 方法获得的光谱的细化表明，取代导致从二次相 (P4mm) 到伪立方相 (Pm m) 的转变。功能带的出现也通过室温拉曼光谱验证。利用扫描电子显微镜（SEM）观察了PbSrTiO陶瓷的织构、形貌和显微结构。通过在 30 °C 至 500 °C 温度范围内的介电测量阻抗谱作为频率函数对介电性能进行了研究，证实了锶的掺入并强调了其对居里温度 (T)、介电常数值的影响(ε) 和介电损耗 (tanδ)。