Effect of Zr^(4+)on piezoelectric,dielectric and ferroelectric properties of barium calcium titanate lead-free ceramics

作     者：Prasanta Kumar Panda Benudhar Sahoo V.Sureshkumar Ekaterina Dmitrievna Politova 

作者机构：Materials Science DivisionCSIR-National Aerospace Laboratories KodihalliBengaluru 560017India Semenov Federal Research Centre for Chemical PhysicsRussian Academy of Sciences Kosygin 4Moscow 119991Russia 

出 版 物：《Journal of Advanced Dielectrics》 (先进电介质学报（英文）)

年 卷 期：2021年第11卷第6期

页      面：23-31页

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

主　　题：ZrO_(2)-doped BCT lead-free piezoelectrics high piezoelectric charge constant Curie temperature 

摘      要：Ba_(0.85)Ca_(0.15)(Ti1−xZrx)O_(3)(BCTZ)ceramics with x=0.05,0.10,_(0.15),0.20,0.25,0.30 were prepared by the solid-state reaction *** of the powders was carried out at 1100°C for 4 h and the green pellets were sintered at 1400°C for 2 h.X-ray diffraction patterns of the sintered pellets showed tetragonal splitting up to x=0.10 while the mixture of the rhombohedral/cubic phase appeared at higher ZrO_(2)*** piezoelectric charge constant d33=510 pC/N and strain(S=0.103%)were measured for BCT doped by 0.10 mol ZrO_(2).Dielectric constant,remnant polarization and saturation polarization also found maxima for this *** Curie temperature(TC)of the compositions decreased with increase in ZrO_(2)concentration and reached 98°C,87°C and 36°C at x=0.05,0.10,_(0.15)mol,*** remaining compositions have TC below the room temperature;therefore,they can be used for subzero/cryogenic *** scanning electron microscopy study revealed an increase in grain size with increase in ZrO_(2)concentration and confirmed the complete solubility of ZrO_(2)in the crystal ***,low ZrO_(2)-doped BCT compositions with high d33 could be suitable for low temperature(80°C)applications.