研究了热压法制备0.3PZN-0.7PZT系压电陶瓷过程中，铅含量以及热压和退火工艺对材料性能的影响.实验结果表明，适当降低铅含量、提高退火温度和退火时间可得到性能优良的压电陶瓷.制得的压电陶瓷密度接近理论密度，电性能指标为：d33=715pC/N，Kp=0.65，tgδ=2.9%，εr=3457，Qm=50.1
The factors that have influence on structure and electrical properties of hot pressed 0.3PZN-0.7PZT piezoelectric ceramics，such as Pb content，pressure，annealing temperature and time，were investigated. The results show that the factors of Pb content, annealing temperature and annealing time have big influence on the properties of hot-pressed 0.3PZN-0.7PZT piezoelectric ceramics. With Pb content of 98.5%, annealing temperature of 1250C and annealing time of 7 hours, the piezoelectric properties, d33=715pC/N，Kp=0.65，tg2.9%，r=3457，Qm=50.1. High-density ceramics (99.8% of theoretical value) can be obtained with the hot pressing and annealing method.
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