The dielectric constants, ferroelectric hysteresis loops and piezoelectric charge coefficients of the BCZTCceramic samples were also investigated.Optimum values for the relative dielectric constant (ε), tan ıand piezoelectric charge coefficient (d33) of the samples were 3830, 0.03 and 306 pC/N, respectively, inthe Cu mole fraction samples with x = 0.002.