摘要
以压电体(K0.45Na0.55)0.98Li0.02Nb0.77Ta0.18Sb0.05O3和压磁体Co0.85Cu0.15Fe2O4为原料,通过传统的固相反应法制备了(1-x)[(K0.45Na0.55)0.98Li0.02Nb0.77Ta0.18Sb0.05O3]-xCo0.85Cu0.15Fe2O4多铁性复合陶瓷,并使用X射线衍射仪、扫描电子显微镜、压电测试仪、铁电测试仪和磁电耦合测试仪对物相、显微结构、压电、铁电、磁电耦合性能进行了分析。结果表明,复合陶瓷的相结构保持为(K0.45Na0.55)0.98Li0.02Nb0.77Ta0.18Sb0.05O3和Co0.85Cu0.15Fe2O4两种物相,但两者之间发生了轻微的化学反应。随着Co0.85Cu0.15Fe2O4压磁相含量的增加,复合陶瓷的压电系数从56pC/N减小到21pC/N,剩余极化强度略有降低。在压磁相含量为0.2时可获得4.3mV·cm-1·Oe-1的最佳磁电耦合系数。
The （ 1-x） [ （K0.45 Na0.55）0.98 Li0.02 Nb0.77 Ta0.18 Sb0.05 O3]xCo0.85 Cu0.15Fe2O4 composite ceramics were prepared using piezoelectric （K0.45 Na0.55）0.98 Li0.02 Nb0.77 Ta0.18 Sb0.05 O3 and piezomagnetic Co0.85 Cu0.15 Fe2O4 as starting materials by conventional solid-state reaction method. The phases, microstructures, piezoelectric, ferroelectric and magnetoelectric properties of composite ceramics were characterized by X-ray diffractometer, scanning electron micro- scope, piezoelectric, ferroelectric and magnetoelectric coupling tester. The composite ceramics showed mixed phase of （K0.45 Na0.55）0.98 Li0.02 Nb0.77 Ta0.18 Sb0.05 O3 and Co0.85 Cu0.15 Fe2O4, and had a weak chemical reaction between two phases. With the increase of Co0.85 Cu0.15 Fe2O4 content, the piezoelectric coefficient of composite ceramics decreased from 56 pC/N to 21 pC/N, and the remnant polarization slightly decreased. An optimal magnetoelectric coupling coefficient of 4. 3 mV·cm^-1·Oe^-1 was obtained at a piezomagnetie phase content of 0.2.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2016年第2期9-12,共4页
Materials Reports
基金
广西信息材料重点实验室项目(1210908-204-Z
131024-Z)
