电子元件与材料2009，Vol.28Issue(11)：1-4,4.DOI:10.3969/j.issn.1001-2028.2009.11.001
Bi改性铌酸钾钠基无铅压电陶瓷的温度稳定性
Temperature stability of Bi-modified potassium-sodium niobate based lead-free piezoelectric ceramics
摘要
Abstract
Potassium-sodium niobate based piezoelectric ceramics, (Na_(0.53)K_(0.41)Li_(0.06))Nb_(0.955)Sb_(0.045)O_3 (NKLNS), show excellent piezoelectric properties as their orthorhombic-tetragonal polymorphic phase transition temperature is colse to room temperature. However, the piezoelectric properties are unstable with the change of temperature. With the doping of Bi_2O_3, the orthorhombic-tetragonal phase transition temperature t_(O-T) of the ceramics can be decreased from 15 ℃ to - 9 ℃, while the higher Curie temperature t_C (368 ℃) can be maintained. Therefore the temperature stability of the piezoelectric properties of the ceramics is effectively improved. The Bi-modified ceramics exhibit excellent electrical properties with d_(33) = 213pC/N, k_p = 0.441,ε_(33)~T=1 319 and tanδ = 0.016, owing to the donor doping effect of Bi~(3+) and strong electronegativity of Sb~(5+).关键词
铌酸钾钠/多型相变/温度稳定性/无铅压电陶瓷Key words
potassium-sodium niobate/ polymorphic phase transition/ temperature stability/ lead-free piezoelectric ceramic分类
信息技术与安全科学引用本文复制引用
吴清早,王矜奉,郑立梅,臧国忠,赵明磊..Bi改性铌酸钾钠基无铅压电陶瓷的温度稳定性[J].电子元件与材料,2009,28(11):1-4,4.基金项目
国家自然科学基金资助项目(No. 50802038) （No. 50802038）
教育部博士点基金资助项目(No. 20070422059) （No. 20070422059）
