Electromechanical Properties of Ferroelectric Single Crystal PIN-PT with High Curie Temperature

Abstract

Abstract: Relaxor ferroelectric single crystal Pb(In_1/2Nb_1/2)O₃-PbTiO₃ (PIN-PT) has a higher Curie temperature than Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ (PMN-PT), which has a prospect in the application of sensors and transducers requiring high stability and high performance. In this work, the full matrix mechanical and electrical properties of [001]-poled 0.66PIN-0.34PT ferroelectric single crystal were studied by resonance method. The rhombohedral-tetragonal transformation temperature (T_RT) and Curie temperature (T_C) of 0.66PIN-0.34PT single crystal are 160 ℃ and 260 ℃, respectively. The room temperature piezoelectric coefficients d₃₃, d₃₁ and d₁₅ of 0.66PIN-0.34PT ferroelectric single crystal are 1 340 pC/N, -780 pC/N and 321 pC/N, respectively. The dielectric constants ε^T₃₃, ε^S₃₃, ε^T₁₁, ε^S₁₁ are 2 700, 905, 2 210, 1 927, respectively. The electromechanical coupling coefficients k₃₃, k₃₁, k₁₅, k_t are 87%, 58%, 38%, 61%, respectively. The value of piezoelectric constant (d₃₃) and electromechanical coupling coefficient (k₃₃) of 0.66PIN-0.34PT single crystal are smaller than those of PMN-PT single crystal, but the transverse piezoelectric properties (d₃₁) and shear piezoelectric properties (d₁₅) are slightly higher than those of PMN-PT single crystal. In addition, the trend of variation in electromechanical coupling performance was studied, and it is found that 0.66PIN-0.34PT single crystal has good temperature stability below 150 ℃.

Key words: PIN-PT, relaxor ferroelectric single crystal, full matrix parameter, piezoelectric property, electromechanical property, sensor

CLC Number:

LIU Manman, WANG Yuequn, XIONG Junjie, ZHANG Wenjie, KONG Shuyan, YANG Xiaoming, WANG Zujian, LONG Xifa, HE Chao. Electromechanical Properties of Ferroelectric Single Crystal PIN-PT with High Curie Temperature[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2022, 51(4): 579-586.

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