Qiao Liao, Li Qian, Qiu Chaorui, Liu Yangbin, Liu Jinfeng, Xu Zhuo, Li Fei
IEEE Trans Ultrason Ferroelectr Freq Control. 2019 Nov;66(11):1786-1792. doi: 10.1109/TUFFC.2019.2928371. Epub 2019 Jul 12.
To date, the complete sets of electromechanical-related coefficients of Pb(InNb)O-Pb(MgNb)O-PbTiO (PIN-PMN-PT) single crystals have been reported only at room temperature (RT). To meet the demands of practical applications, the full sets of elastic, piezoelectric, and dielectric constants of [001]-poled rhombohedral PIN-PMN-PT single crystals were measured as a function of temperature ranging from -10 °C to 70 °C by the resonance method. Variation trends of the material constants with temperature are discussed, and the corresponding mechanisms are analyzed. With increasing temperature, absolute values of the elastic compliance constants, the piezoelectric coefficients d , and the dielectric permittivities ε increase, but the piezoelectric voltage coefficients g and the characteristic frequencies decrease. The electromechanical coupling factors k are not sensitive to temperature, of which k keeps 91% in the temperature range of -10 °C to 70 °C. Compared with other coefficients, the piezoelectric coefficients d , d , and d , and the dielectric permittivities ε , ε , ε , and ε , show the largest enhancements with increasing temperature. For example, the piezoelectric coefficients d and d , and the dielectric permittivities ε and ε change from -560 pC/N, 1130 pC/N, 1050, and 3300 at -10 °C to -890 pC/N, 1700 pC/N, 2030, and 6140 at 70 °C, increasing by more than 50% from -10 °C to 70 °C.
迄今为止，关于Pb(InNb)O-Pb(MgNb)O-PbTiO（PIN-PMN-PT）单晶的全套机电相关系数仅在室温（RT）下有报道。为满足实际应用的需求，采用共振法测量了[001]极化的菱面体PIN-PMN-PT单晶的全套弹性、压电和介电常数随温度从-10°C到70°C的变化。讨论了材料常数随温度的变化趋势，并分析了相应的机理。随着温度升高，弹性柔顺常数、压电系数d以及介电常数ε的绝对值增大，但压电电压系数g和特征频率降低。机电耦合因子k对温度不敏感，在-10°C至70°C的温度范围内k保持在91%。与其他系数相比，压电系数d、d和d以及介电常数ε、ε、ε和ε随温度升高的增幅最大。例如，压电系数d和d以及介电常数ε和ε在-10°C时分别为-560 pC/N、1130 pC/N、1050和3300，在70°C时变为-890 pC/N、1700 pC/N、2030和6140，从-10°C到70°C增加了50%以上。
