The manuscript presents a systematic study of ferroelectric, piezoelectric and conduction behaviour of Sm, Na substituted Strontium Bismuth Titanate ceramics, prepared by solid-state reaction method. The structural analysis of Bismuth layer structured ferroelectrics (BLSF) of Sr_1-2xSm_xNa_xBi₄Ti₄O₁₅ (SSNBTi) ceramics was done by X-ray Diffraction technique and it showed single-phase formation and peak shifting towards the higher angles. Scanning Electron Microscopy confirmed orthorhombic sheet-like grain structure with random orientation of grains. P-E study and Piezoelectric studies were done at room temperature (RT); improved remnant polarization (P_r = 1.95 μC/cm²), Piezoelectric charge coefficient (d₃₃ = 21.1 pC/N) and electromechanical coupling factor (k_p = 0.71) were achieved by substitution of Sm, Na (x = 0.4) in Sr of SBTi ceramics. The AC conductivity was studied from RT to 600 °C in the frequency range of 1 kHz–100 kHz. The trends shown by Activation energies obtained from Arrhenius plots suggests that the mechanism of conduction is through short-range oxygen vacancies hopping. The combination of improved ferroelectric properties and high piezoelectric constant (k_p = 0.71) make the SSNBTi ceramics suitable for a wide range of sensor, actuator, and transducer applications.

该手稿对通过固态反应方法制备的Sm，Na取代的锶铋钛酸盐陶瓷的铁电，压电和导电行为进行了系统的研究。用X射线衍射技术对Sr _1-2x Sm _x Na _x Bi ₄ Ti ₄ O ₁₅（SSNBTi）陶瓷的铋层结构铁电材料（BLSF）进行了结构分析，结果表明单相形成且峰向纳米方向偏移。更高的角度。扫描电子显微镜证实正交晶片状晶粒结构具有随机的晶粒取向。PE研究和压电研究在室温（RT）下进行；改善的剩余极化（P _r = 1.95μC/ cm ²）， 通过在SBTi陶瓷的Sr中替代Sm，Na（x = 0.4）获得压电电荷系数（d ₃₃  = 21.1 pC / N）和机电耦合系数（k _p = 0.71）。研究了从RT到600°C在1 kHz–100 kHz频率范围内的交流电导率。从Arrhenius图获得的活化能显示的趋势表明，传导机制是通过短程氧空位跳跃。改进的铁电性能和 高压电常数（k _p = 0.71）的结合使SSNBTi陶瓷适用于各种传感器，执行器和换能器应用。