To develop the anisotropic ceramic substrate with low sintering temperature for surface acoustic wave (SAW) applications, the low cost and feasible material systems with moderate piezoelectric properties, good dielectric properties, higher curie temperature and higher effective energy transformation ratio for devices would be explored. The piezoelectric ceramics with compositions of PbCa0.01[(Mn1/3Nb2/3)0.06-(Zr0.52Ti0.48)0.94]O3 (PMN-PZT)+x wt.％ ZnO+0.1 wt.％ CuO (0.5≦x≦2) (abbreviated PMNZT-CZ10x) had been prepared by the conventional mixed-oxide meyhod. The ZnO and CuO dopants were used as the sintering aids to improve the bulk density and lower the sintering temperature. The phase structures, microstructures, dielectric and piezoelectric properties, and ferroelectric properties versus ZnO and CuO additives were systematically investigated. Experimental results showed that the sintering temperature could be lowered down to 980℃ and still keep reasonably good characteristics. We found that addition of co-doping of ZnO and CuO could enhance the relative dielectric constant, conpling factors, and remanent polarization compared to those of pure PMN-PZT.
關聯:
2008 International Symposium on Nano Science and Technology International Symposium on Nano Science and Technology
