Y^(3+)取代对La_(2)Ti_(2)O_(7)压电陶瓷性能的影响  

Effects of Y3+Substitution on Properties of La2Ti2O7 Piezoelectri Ceramics

作　　者：贺立龙 吴垠昊 郝刚 魏晓勇[2] HE Lilong;WU Yinhao;HAO Gang;WEI Xiaoyong(Xi’an Chuanglian Electronic Component(Group)Co.Ltd.,Xi’an 710065,China;Electronic Materials Research Laboratory,Key Laboratory of the Ministry of Education,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安创联电气科技(集团)有限责任公司,陕西西安710065 [2]西安交通大学电子陶瓷与器件教育部重点实验室,陕西西安710049

出　　处：《压电与声光》2021年第2期240-243,共4页Piezoelectrics & Acoustooptics

摘　　要：采用传统固相法合成了不同取代量的类钙钛矿结构Y_(x)La_(2-x)Ti_(2)O_(7)陶瓷,研究了Y^(3+)取代对La_(2)Ti_(2)O_(7)压电陶瓷相结构及电性能的影响。结果表明,Y^(3+)的最大固溶量是x=0.20,在固溶极限以下所合成的陶瓷为单一的四层类钙钛矿纯相;A位Y^(3+)的取代使得La_(2)Ti_(2)O_(7)陶瓷的介电常数增加,介电损耗减小,且取代后陶瓷介电常数随频率变化的稳定性更好;Y^(3+)的加入提升了陶瓷的微波性能,使陶瓷的谐振频率变大,品质因数升高,介电损耗下降,其中Y_(0.10)La_(1.90)Ti_(2)O_(7)陶瓷的微波性能最好。The perovskite-like Y_(x)La_(2-x)Ti_(2)O_(7)ceramics with different substitution amounts were prepared by the traditional solid-state reaction method.The effects of A-site Y^(3+)substitution on the phase structure and properties of La_(2)Ti_(2)O_(7)piezoeledctric ceramics were investigated.The results showed that the maximum amount of Y^(3+)in the solid solution was x=0.20 and the prepared ceramics under the solid solution limit were single four-layer perovskite-like pure phase.The substitution of Y^(3+)at the A-site increased the dielectric constant and reduced the dielectric loss,and the frequency stability of the dielectric constant with frequency changes was better after substitution.The addition of Y^(3+)makes the resonant frequency and qulity factor increase and the dielectric loss reduce.In other words,the microwave performance of the ceramics was improved,and among the prepared ceramics,the microwave properties of Y_(0.10)La_(1.90)Ti_(2)O_(7)ceramic was the best.

关 键 词：压电陶瓷 类钙钛矿结构 A位Y^(3+)取代 微波性能 

分 类 号：TN384[电子电信—物理电子学] TM282[一般工业技术—材料科学与工程]