电子元件与材料2025，Vol.44Issue(7)：803-810,8.DOI:10.14106/j.cnki.1001-2028.2025.0060
氧化钴掺杂铪钛酸钡钙陶瓷压电性能的微观机制研究
Study on the microscopic mechanism of piezoelectric performance of Co2O3-doped Ba0.85Ca0.15Ti0.9Hf0.1O3 ceramics
摘要
Abstract
Lead-free piezoelectric ceramics of the Ba0.85Ca0.15Ti0.9Hf0.1O3+x％Co2O3(x=0.0,0.2,0.4,0.6,0.8,1.0)series were prepared using the solid-state reaction method.The microstructure,surface morphology,and macroscopic ferroelectric,dielectric,and piezoelectric properties of the prepared ceramics were tested and analyzed.The results show that all samples are ferroelectric perovskite phases at room temperature.The addition of Co2O3 can restrain grain growth.At higher Co2O3 doping,the remanent polarization(Pr)of the ceramics decreases,the coercive field(Ec)increases,and the Curie temperature(Tc)decreases.The piezoelectric coefficient(d33)and electromechanical coupling coefficient(kp)of the ceramics vary with the density of the ceramic body.The piezoelectric coefficient can be affected by a combination of the ceramic body's density,phase structure,and average grain size.At x=0.2,the ceramics have a coexistence of R-O phases,the highest density,and larger grain size.At this time,the piezoelectric coefficient and electromechanical coupling coefficient are the largest,which have the values of 339 pC/N and 38％respectively at a density of 5.84 g/cm3.The coexistence of R-O phases and high density are the main reasons for the large piezoelectric coefficient.关键词
无铅压电陶瓷/铪钛酸钡钙/固相反应法/氧化钴掺杂/微观机制Key words
lead-free piezoelectric ceramics/barium calcium hafnium titanate/solid-state reaction method/Co2O3-doping/microscopic mechanism分类
信息技术与安全科学引用本文复制引用
田兴国,尹红梅,李雄伟,周恒为,张丽丽..氧化钴掺杂铪钛酸钡钙陶瓷压电性能的微观机制研究[J].电子元件与材料,2025,44(7):803-810,8.基金项目
新疆维吾尔自治区自然科学基金(2024D01C48) （2024D01C48）
新疆凝聚态相变与微结构实验室开放课题(XJDX0912Z2501) （XJDX0912Z2501）
