研究了锰掺杂对0.2PZN-0.8PZT(PZNT)陶瓷微观结构及压电性能的影响,结果表明:随锰离子的添加,陶瓷晶粒长大,烧结致密;晶格发生畸变,体系的相结构由四方相向三方相过渡,居里点降低。此外,锰掺杂使材料体系“变硬”,ε33T/ε0和tanδ变小,Qm值增加,同时瓷体较高的致密度又保证了Kp不致降低。
The effects of manganese addition on the microstructure and piezoelectric properties of 0.2PZN-0.8PZT(PZNT) ceramics were investigated. The results reveal that the lattice
structures of the piezoelectric materials are transformed from the tetragonal phase to the rhombohedral, the grain sizes are enhanced and their Curie temperatures
are lowered with the increasing of manganese. On the other hand, the piezoelectric materials become more hard, ε33T/ε0 and tanδ
decreasing but Qm improving with the additions of manganese. Moreover, the high densification assures Kp out of decreasing.
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