Electrostrictive effects in potassium tantalate niobate

Electrostrictive effects in the potassium tantalate niobate solid solution (K(Ta 0.55 Nb 0.45 )O 3 ) have been investigated. The electrostrictive coefficients were determined by a strain gauge technique and by the measurement of hydrostatic pressure dependence of dielectric constant near the Curie temperature. The Q values obtained are Q 11 =9.5x10 −2 , Q 12 =-3.6x10 −2 and Q h =2.3x10 −2 m 4 C −2 , which are almost the same as those of end-members, KTaO 3 and KNbO 3 . The "constant QC rule" is maintained in this solid solution.