摘要
采用传统陶瓷的制备方法制备了CeO2(0～1.0wt%)和Sb2O3(0～0.6wt%)掺杂的(Na0.88K0.12)0.5Bi0.5TiO3无铅压电陶瓷。运用XRD技术研究了样品的晶体结构,测试并分析了样品的介电、压电性能以及谐振频率温度系数。结果表明:所有组成均呈三方结构的钙钛矿型固溶体特征。在适当掺杂剂用量范围内,压电陶瓷的压电常数、介电常数和介电损耗升高,而平面机电耦合系数降低。CeO2和Sb2O3掺杂均改善了(Na0.88K0.12)0.5Bi0.5TiO3压电陶瓷频率温度稳定性。
（Na0.83K0.12）0.5Bi0.5TiO3 lead-free piezoelectric ceramics doped with CeO2（0-1.0wt%） and Sb203 （0-0.6wt%） were prepared by conventional ceramics preparation technique. The crystal structures of the samples were studied by XRD. The dielectric, piezoelectric properties and the resonance frequency temperature coefficient were measured and analyzed. The results indicate that all compositions show the characteristics of rhombohedral perovskite structure solid states. The piezoelectric constant, dielectric constant and dielectric loss of the piezoelectric ceramics increase with an appropriate amount of dopant, however, the planar electromechanical coupling factor decreases. The frequency temperature stability of the piezoelectric ceramics is improved with the present of CeO2 and Sb2O3.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2005年第6期15-19,共5页
China Ceramics
基金
国家自然科学基金(编号:50272044)
日本NSG基金资助。
关键词
钛酸铋钠
陶瓷
稳定性
Sodium-bismuth titanate, CeO2-doped, Sb2Q-doped, Lead-free piezoelectric ceramic, Frequency temperature stability
