分别采用氟化物和硼硅玻璃为助烧剂制备了低温烧结PZN基复相陶瓷，并借助介电温度特性研究了复相陶瓷中的两相共存与助烧剂的关系．结果表明，添加剂引入的晶格缺陷对复相陶瓷中的两相共存有显著影响,LiF助烧剂因引起晶格氧空位促进两相固溶化，而MgF2和硼硅玻璃助烧的PZN复相陶瓷可保持两相共存．以硼硅玻璃为助烧剂获得了低温烧结、具有X7R温度稳定特性的PZN基复相陶瓷．
PZN-based composite ceramics were prepared at lower sintering temperature by using fluorides and borosilicate glass as sintering aids. The correlation between the coexistence of two phases in
composite ceramics and sintering aids was studied. The results revealed that the crystal lattice defects caused by additives have detrimental effect on the coexistence of two phases in composites.
Incorporation of LiF into PZN crystal lattice promotes the reaction between two phases due to oxygen vacancies, while PZN-based composite ceramics with MgF2 and borosilicate glass aids maintain
diphasic microstructure. PZN-based diphasic ceramics with X7R character were obtained at lowe sintering temperature by using borosilicate glass as sintering aids.
参考文献
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