Effect of CuO addition on sintering temperature and piezoelectric properties of 0.05Pb(Al_(0.5_Nb_(0.5))O_3-0.95Pb(Zr_(0.52)Ti_(0.48))O_3+0.7 wt.% Nb_2O_5 + 0.5 wt.% MNO_2 ceramics

摘要

Effect of CuO addition on piezoelectric properties of 0.05Pb(Al_(0.5)Nb_(0.5))O_3-0.95Pb(Zr_(0.52)Ti_(0.48))O_3+0.7 wt.% Nb_2O_5 + 0.5 wt.% MNO_2 (PAN-PZT) ceramics was studied to decrease the sintering temperature below 900℃ for LTCC. The PAN-PZT ceramics sintered at 1200℃ had piezoelectric properties of d_(33) = 340 pC/N, k_p = 61.6%, Q_m = 1,725, and density of 7.5 g/cm~3. The addition of CuO significantly decreased the sintering temperature due to the formation of liquid phase containing a binary combination of PbO and CuO in grain boundary. Piezoelectric properties of d_(33) = 361 pC/N, k_p = 57%, Q_m = 145, and density of 7.8 g/cm~3 were achieved at sintering temperature of 900℃. The CuO doped PAN-PZT ceramics show high density and d_(33) at low sintering temperature though its electromechanical quality factor abruptly decreases due to the CuO additive effect.