What is the piezoelectric voltage constant for Lithium Tantalate, LiTaO3?

Question

Does anyone know what is the piezoelectric voltage constant for Lithium Tantalate, LiTaO3? Can help me? Thank you

Answer 1

A question with multiple answers, since response along different axes varies. Ref. 1 provides 2 values while ref. 2 provides a 3x6 coupling matrix. (Note ref. 1 gives units and scale in the "UNITS" column and value in the "FIGURE" column.) From the "Strain-Charge" format link in ref. 2, "Piezoelectricity is described mathematically within a material's constitutive equation, which defines how the piezoelectric material's stress (T), strain (S), charge-density displacement (D), and electric field (E) interact." This link explains the