摘要
The hydrostatic piezoelectricity of Pb(Mg_(1/3)Nb_(2/3))-αPbTiO_(3)(PMN-εPT)ceramics and PMN-0.32PT and Pb(Mg_(1/3)Nb_(2/3))-Pb(In_(1/2)Nb_(1/2))=PbTiO_(3)(PMN-PIN-PT)crystals wereinvestigated through a quasi-static method.The results showed that pressure-induced depolar-ization occurred in PMN-εPT ceramics when pressure was above about 50 MPa,while there wasno obvious pressure-induced depolarization for PMN-0.32PT and PMN-PIN-PT crystals inthe whole pressure range(0~530 MPa).The hydrostatic piezoelectric coeficient dh of PMN-0.32PT and PMN-PIN-PT crystals was nearly independent of pressure.The d_(h)of mono-domain orthorhombic and tetragonal phase crystals is slightly larger,on the order of 100 pC/N.In addition,the relationship between the hydrostatic piezoelectric coeficient d_(h)and the longit udinal and transverse piezoelectric coefficients d_(33)and d_(31)for different crystal systems was summarized.
基金
the National Natural Science Foundation of China-NSAFGrant No.10976022 and Grant No.51102193
the National Basic Research Program of China(973Program)(Grant No.2009CB623306)
Inter-national Science and Technology Cooperation Pro-gram of China(Grant No.2010DFR50480).
