ABSTRACT Strontium bismuth niobate (SrBi2Nb2O9 (SBN), K0.025Sr0.95Gd0.025Bi2Nb2O9 (KSGBN1), K0.05Sr0.9Gd0.05Bi2Nb2O9 (KSGBN2) and K0.1Sr0.8Gd0.1Bi2Nb2O9 (KSGBN3)) ceramics were prepared by two stage solid state reaction method. Calcination was done at 850oC for 4 h. Structural property of calcined samples was studied by powder X-ray diffraction (XRD) technique at room temperature. XRD patterns of the samples so obtained matched well with the reported data (ICSD #82280). Lattice parameters of the samples were calculated using POWD software. Pellets of 10 mm diameter and ∼1 mm thickness were prepared using uniaxial hydraulic press at 10 MPa pressure. These pellets were finally sintered at 950oC for 4 h. The surface morphology of the samples was studied with scanning electron microscope (SEM). The density of the sintered ceramics was measured by Archimedes principle. Impedance variation with temperature was studied for SBN, KSGBN1, KSGBN2 and KSGBN3 in the frequency range of 100 Hz to 1 MHz. The temperature dependence of dielectric properties of SBN, KSGBN1, KSGBN2 and KSGBN3 were obtained at some set frequencies in the range of 100 Hz to 2 MHz using HP 4192A impedance analyzer. The data obtained was analyzed based on change in tolerance factor, anisotropy and strain due to the presence of doped impurities. Interesting conclusions arrived at have been presented. GRAPHICAL ABSTRACT

中文翻译：

---

双掺杂铌酸锶铋铁电陶瓷的合成、阻抗和介电研究

摘要 铌酸锶铋（SrBi2Nb2O9（SBN）、K0.025Sr0.95Gd0.025Bi2Nb2O9（KGBN1）、K0.05Sr0.9Gd0.05Bi2Nb2O9（KGBN2）和K0102Nb2O9（KGBN2）和K0102G02G02K02G02K02G02K02G02K02G02K02G02K02G01K02G02K02G0102G02K02G01K02G0102G02G01.02G01.02G01.02G01.02G01.02G02G01.02G02G01.02G02G02Nb2O9（KGBN2）陶瓷分别制备了两级。状态反应法。在 850oC 下煅烧 4 小时。通过粉末X射线衍射（XRD）技术在室温下研究了煅烧样品的结构特性。如此获得的样品的 XRD 图案与报告的数据 (ICSD #82280) 很好地匹配。使用POWD软件计算样品的晶格参数。使用单轴液压机在 10 MPa 压力下制备直径为 10 mm 和约 1 mm 厚的颗粒。这些颗粒最终在 950oC 下烧结 4 小时。用扫描电子显微镜（SEM）研究样品的表面形貌。通过阿基米德原理测量烧结陶瓷的密度。在 100 Hz 至 1 MHz 的频率范围内研究了 SBN、KSGBN1、KSGBN2 和 KSGBN3 的阻抗随温度的变化。使用 HP 4192A 阻抗分析仪在 100 Hz 至 2 MHz 范围内的某些设定频率下获得 SBN、KSGBN1、KSGBN2 和 KSGBN3 介电特性的温度依赖性。由于掺杂杂质的存在，基于容差因子、各向异性和应变的变化对获得的数据进行了分析。得出了有趣的结论。图形概要 KSGBN2 和 KSGBN3 是使用 HP 4192A 阻抗分析仪在 100 Hz 至 2 MHz 范围内的某些设定频率下获得的。由于掺杂杂质的存在，基于容差因子、各向异性和应变的变化对获得的数据进行了分析。得出了有趣的结论。图形概要 KSGBN2 和 KSGBN3 是使用 HP 4192A 阻抗分析仪在 100 Hz 至 2 MHz 范围内的某些设定频率下获得的。由于掺杂杂质的存在，基于容差因子、各向异性和应变的变化对获得的数据进行了分析。得出了有趣的结论。图形概要