对钨青铜结构型的压电陶瓷［Pbx（Ba．Sr）1-x］4（Na0．88Li0．12）2Nb10O30，x＝0．64（PBNN）的逆压电效应的应变（S）随电场（E）变化特性进行了研究，研究表明该材料的S-E线性好，滞后小．是一种制备随动型压电微位移器的优良材料．从X射线结构分析和S-E变化关系精细测量分析表明，该材料不存在钙钛矿结构型PZT系压电陶瓷（属赝立方铁电相）中由于c←→a，c←→b三晶轴在外电场下互换形成的畴的90°转向，仅有畴的180°转向．这是它S-E特性优良的原因．测量表明，其S-E关系在～350V／mm较高场强处斜率呈现～5％的微小突增，认为这是由于它属假正交晶系，在较强外场下轴长几乎相等的a、b轴间互换对应变的贡献所致．
The characterizations of strain S with electric E in converse piezoelectric effect for [Pbx(Ba, Sr)1-x]4(Na0.88Li0.12)2Nb10O30 x=0.64
(PBNN) piezoelectric ceramic with tungsten bronze (T.B.) structure were studied. The excellent micro-displacement properties, such as high
linearity, low hysteresis and high coercive field, were exhibited for PBNN ceramic, which were suitable to prepare servo piezoelectric
actuators. According to X-ray diffraction structure analysis and measurement results of the relation of S with E, it was shown that
in the PBNN piezoelectric ceramic with T.B. structure only the 180° switch of the domain exists without 90° switch of the domain, which inherently exists in PZT based piezoelectric
ceramics with peroveskite (P.S.) structure. For PBNN ceramic the excellent characterization of S with E was due to their no 90°
switch of the domain. It is found that by more carefully measuring and analyzing the curve of S with E a slight increase of slope (about 5%)
occurs at a higher electric field ～350V/mm, which had been explained from pseudo-orthorhombic crystal structure of PBNN ceramic.
参考文献
| [1] | Takahashi S. Ferroelectric, 1989, 91: 293--302 2 Uchino K. Materials letters, 1995, 22: 1--4 3 陈大任. 电子元件与材料， 1994， 13(1): 2--7 4 Noblanc O, Gaucher P. Ferroelectrics, 1994, 160: 145--155 5 Zhang Q M, Pan W Y, Jang S T, et al. J. Appl. Phys., 1988, 64 (11): 6445--6451 6 陈大任，李国荣，殷庆瑞(Chen Da-Ren, et al). 无机材料学报(Journal of Inorganic Materials)， 1997， 12 (6): 861--866 7 Chen D R, Zhu M G , Zhang W Z, et al. Preceedings of International Symposium on Electorates (ISE9’1996). 1061--1067 8 陈大任，李国荣，朱梅根等, 功能材料与器件学报, 1997， 3 (4): ??36--242 9 郭常霖，陆昌伟. 硅酸盐学报， 1983， 11(2): 231--234 10 郭常霖，陆昌伟. 物理学报， 1980, 29(2): 247--256 11 钟维烈，铁电物理学，北京: 科学出版社，1996. 12 Nevrgaonkar R R, Oliver J R, Cory W K, et al. Ferroelectrics, 1994, 160: 265--276 |
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