本项目拟研究组分连续变化的PbZrO3-xPbTiO3-(0.1-x)Pb(Zn1/3Nb2/3)O3三元系陶瓷的制备及其扩散行为。在掌握其微结构、热释电性能和组分分布随初始组分、配比、前期热处理条件、烧结参数和后续热处理条件的变化规律的基础上，利用严格控制前期热处理条件下的放电等离子烧结结合后续热处理的方法制备组分连续变化的PZ-PT-PZN热释电陶瓷，实现其宽温范围内的线性热释电响应，拓展其使用范围。通过对其不同制备阶段的组分分布的系统研究，弄清其扩散行为，丰富功能陶瓷的烧结理论研究。本项目提出的放电等离子烧结结合后续热处理的方法在制备其它组分连续变化的功能陶瓷材料中也有着广泛的应用前景，相关工作的展开具有重要的理论和实际意义。

Preparation and diffusion behavior of PbZrO3-xPbTiO3-(0.1-x)Pb(Zn1/3Nb2/3)O3 ternary ceramics with continuous compositional distribution will be studied in present work. On the basis of knowing the dependence of the microstructure, the pyroelectric properties and the compositional distribution on the initial composition, the pre-heat-treatment conditions, the sintering parameters and the post-heat-treatment conditions, the PZ-PT-PZN pyroelectric ceramics with continuous compositional distribution will be prepared by spark plasma sintering combined with strict pre- and post-heat-treatment, which will realize a linear pyroelectric response during a wide temperature range and broaden the sphere of application of this ternary ceramic. Through the systematic studying on the compositional distribution of different preparation stages, the diffusion behavior will be clarified. The obtained results will promote the theoretical study of sintering and the proposed method will provide a new approach to prepare other functional ceramics with continuous compositional distribution.