Abstract Ferroelectric ceramic compositions SrBi2–xYxNb2O9 (x = 0.0, 0.2, 0.4, 0.6 and 0.8) were prepared via conventional solid-state route with high density (92-99%) establishing the sintering conditions. X-ray diffraction studies confirmed the orthorhombic structure. The micrographs obtained from scanning electron microscopy showed the presence of well packed and randomly oriented needle-shaped grains with an average grain size of 1.624 μm. FTIR and Raman studies on these samples indicated the growth of single phase perovskite material. From the dielectric studies, the phase transition temperature (T c) of strontium bismuth niobate (SBN) was found to be 430oC, whereas the Tc of yttrium substituted SBN (SBYN) was found to decrease from 400° to 370°C. The transition was diffuse and frequency dependent which is a characteristic behavior of relaxor material. The diffuseness parameter (γ) was computed for all the compositions. P-E loop measurements showed a decrease in the parameters P s, P r and E c in yttrium substituted SBN compared to SBN. Piezoelectric studies in SBN and SBYN estimated k p, d 33, g 33 and Qm values. Cole-Cole plots were obtained from studies on SBN and SBYN at different temperatures in the frequency range 50 Hz to 1 MHz. The activation energy values were computed. GRAPHICAL ABSTRACT

中文翻译：

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钇取代 SrBi2Nb2O9 无铅弛豫陶瓷的结构、铁电、介电和压电研究

摘要 铁电陶瓷组合物 SrBi2–xYxNb2O9 (x = 0.0, 0.2, 0.4, 0.6 和 0.8) 是通过常规的固态途径制备的，具有高密度 (92-99%)，建立了烧结条件。X 射线衍射研究证实了正交结构。从扫描电子显微镜获得的显微照片显示存在排列良好且随机取向的针状晶粒，平均晶粒尺寸为 1.624 μm。对这些样品的 FTIR 和拉曼研究表明单相钙钛矿材料的生长。从介电研究中，发现铌酸锶铋 (SBN) 的相变温度 (Tc) 为 430oC，而钇取代的 SBN (SBYN) 的 Tc 从 400°C 降低到 370°C。跃迁是扩散和频率相关的，这是弛豫材料的特征行为。计算所有组合物的扩散参数 (γ)。PE 回路测量表明，与 SBN 相比，钇取代的 SBN 中的参数 P s、P r 和 E c 降低。SBN 和 SBYN 中的压电研究估计了 kp、d 33、g 33 和 Qm 值。Cole-Cole 图是从 50 Hz 到 1 MHz 频率范围内不同温度下对 SBN 和 SBYN 的研究中获得的。计算活化能值。图形概要 Cole-Cole 图是从 50 Hz 到 1 MHz 频率范围内不同温度下对 SBN 和 SBYN 的研究中获得的。计算活化能值。图形概要 Cole-Cole 图是从 50 Hz 到 1 MHz 频率范围内不同温度下对 SBN 和 SBYN 的研究中获得的。计算活化能值。图形概要