Dielectric and piezoelectric properties of CuO added $(K_{0.5}Na_{0.5})_{0.97}(Nb_{0.96}Sb_{0.04})O_3$ ceramics

CuO첨가에 따른 $(K_{0.5}Na_{0.5})_{0.97}(Nb_{0.96}Sb_{0.04})O_3$세라믹스의 유전 및 압전 특성

In this study, in order to develop the lead free piezoelectric ceramics with excellent piezoelectric properties, (Na,K)$NbO_3$ ceramics according to the amount CuO addition were fabricated using a conventional mixed oxide process and their piezoelectric and dielectric characteristics were investigated. At the 0.8mol% CuO added composition, density, electromechanical coupling factor(kp), echanical quality factor(Qm), dielectric constant$(\varepsilon_r$) and piezoelectric constant($d_{33}$) showed the optimum value of $4.459g/cm^3$, 0.469, 540, 410, 69.57pC/N, respectively.