Li、Ce掺杂对NBTa-CBN高温压电陶瓷性质的影响研究
Effect of Li、Ce Doping on NBTa-CBN High-Temperature Piezoelectric Ceramic Properties
徐鸿飞 1史伟 1官尚义 1吴禹桐 1陈强1
作者信息
- 1. 四川大学 材料科学与工程学院,四川 成都 610064
- 折叠
摘要
采用传统固相反应法制备了 Ca0.5(Na0.5 Bi0.5)0.5-3x(Li0.5 Ce0.5)3xBi2 TaNb0.99 Mn0.01 O9(CNBTNM-LC100x)高居里温度(TC)压电陶瓷.研究了 Li、Ce复合离子掺杂对陶瓷结构和电学性质的影响.结果表明,随着Li、Ce掺杂量的增加,CNBTNM-LC100x 陶瓷的晶体结构趋于由正交相向四方相转变,压电常数d33 逐渐增大,当x＞0.04(x 为摩尔分数)时,d33 趋于降低.x=0.04 时,具有最优的综合电学性能,d33 约为 15.9 pC/N,600℃下直流电阻率ρ约为 5.9×105 Ω·cm,介电损耗 tan δ(1 MHz)约为 7%,TC 约为 887℃.
Abstract
A Ca0.5(Na0.5 Bi0.5)0.5-3x(Li0.5 Ce0.5)3xBi2 TaNb0.99 Mn0.01 O9(CNBTNM-LC100x)solid-solution piezo-electric ceramic with high Curie temperature(TC)was prepared using the traditional solid-state reaction method.The effect of Li,Ce composite iondoping on the ceramic structure and electrical properties was studied.The results show that,with increasing Li,Ce doping concentration,the crystal structure of CNBTNM-LC100x ceramics tends to transition from orthogonal to tetragonal,and the piezoelectric constant d33 gradually increases.When the molar fraction x＞0.04,d33 tends to decrease.When x=0.04,the ceramic sample exhibits the best comprehensive per-formance,with d33 ≈15.9 pC/N,and the DC resistivity ρ≈5.9×105 Ω·cmat 600℃.Further,the dielectric loss tan δ(1 MHz)≈7%,and TC ≈887℃.
关键词
压电陶瓷/铋层状铁电体/高居里温度/Na0.5Bi2.5Ta2O9/CaBi2Nb2O9Key words
piezoelectric ceramics/bismuth layer-structured ferroelectrics/high Curie temperature/Na0.5Bi2.5-Ta2O9/CaBi2Nb2O9引用本文复制引用
出版年
2024
NETL
NSTL
万方数据