研究了PMN-PT陶瓷在准同型相界(MPB)区域、不同烧结温度下,化学组成、相组成对陶瓷压电性能的影响.发现对于同一化学组成的陶瓷,随着烧结温度的上升,发生了菱方相→四方相的相转变,同时随着菱方相、四方相相比例的接近,陶瓷的压电性能有显著的提高.而在不同烧结温度下,最佳压电性能所对应的化学组成有微小的变化.据此认为,陶瓷的压电性能不仅与化学组成有关,而且与相组成也密切相关,随着烧结温度的变化,发生了准同型相界的微小移动
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