La_3Al_(0.5)Ga_5Ta_(0.5)O_(14)单晶电弹常数的测量  

Determination of the Electro-elastic Constants of La_3Al_(0.5)Ga_5Ta_(0.5)O_(14) Single Crystal

作　　者：尹鑫[1] 张怀金[1] 王继扬[1] 孔海宽[1] 

机构地区：[1]山东大学晶体材料研究所晶体材料国家重点实验室,山东济南250100

出　　处：《压电与声光》2006年第2期215-217,共3页Piezoelectrics & Acoustooptics

基　　金：教育部博士点基金资助项目(200204007)

摘　　要：用LCR电桥、干涉法和谐振法分别测量了La3Al0.5Ga0.5Ta0.5O14(简称LAGT)单晶的相对介电常数,压电应变常数和弹性柔顺常数,并和La3Ga5.5Ta0.5O14(LGT)作了比较。LAGT的介电常数1ε1=22.8,3ε3=72.4;压电应变常数d11=7.6 pC/N,d14=-4.37 pC/N;弹性柔顺常数s1E1=9.45 pm2/N,s3E3=5.59 pm2/N,s1E2=-2.95 pm2/N,s1E3=-2.20 pm2/N,s1E4=-2.58 pm2/N,s4E4=21.43 pm2/N,s6E6=24.80 pm2/N。In this paper, the relative dielectric constants, ance constants of La3Al0.5Ga5Ta0.5O14 single crystal have the piezoelectric strain constants and the elastic complibeen determined by the LCR bridge, interferometric method and resonant method respectively, and compare these parameters with that of La3Al0.5Ga5Ta0.5O14 crystal. The resultants obtained are： the relative dielectric constants ε11 = 22.8, ε33 = 72.4; the piezoelectric strain constants d11 =7.6 pC/N,d14 =-4.37 pC/N;the elastic compliance constant s11^E=9.45 pm^2/N, s33^E=5. 59 pm^2/N,s12^E = -2.95 pm^2/N,s13^E =-2.20 pm^2/N,s14^E =-2.58 pm^2/N,s44^E =21.43 pm^2/N,s66^E =24.80 pm^2/N.

关 键 词：La3Al0.5Ga5Ta0.5O14单晶 介电常数 压电应变常数 弹性柔顺常数 

分 类 号：O48[理学—固体物理]