摘要
采用固相方法制备组分为xBZT-(1-x)YIG(其中x=1,0.95,0.85,0.65)的铁电铁磁复合材料,研究铁磁材料Y3Fe5O12(YIG)的加入对铁电材料Ba(ZrTi)O3(BZT)的物相结构和介电性能的影响。研究表明,YIG加入BZT后,复合材料由BZT和YIG两相组成,且两相能独立存在,没有发生相互反应。复合材料的介电损耗峰随频率的增加向温度高的方向移动。复合材料的介电常数随着频率的增大而减小,随着铁磁相YIG量的增多而逐步减小;且居里峰随着铁磁相YIG量的增多而逐步地压低并宽化,与BZT相比,复合材料BZT/YIG的介电常数受温度的影响要小得多,即介电常数随温度的变化较平缓,有望成为高介热稳定电容器陶瓷材料。
Ferroelectric and ferromagnetic composites xBZT＋（1-x）YIG （x=1,0.95,0.85,0.65） were prepared by solid reaction method. The influence of ferromagnetic Y3Fe3O12 （YIG） dopants on phase and dielectric properties of ferroelectric Ba（ZrTi）O3 （BZT） was studied. It was shown that the BZT phase and the YIG phase coexisted in the sintered compositions, and no chemical interaction occurred between BZT phase and YIG phase during co-firing. The dielectric loss peak of the composites shifted to higher temperature with increases of frequency. The permittivities of the composites decreased with increase of frequency or ferromagnetic YIG content. The Curie peak decreased and broadened with increasing of amounts of YIG. Compared with that of the pure BZT ceramics, the permittivity for the BZT/YIG composites was much less influenced by temperature, i.e temperature dependence of dielectric spectroscopy was approximately flat. As a result, BZT/YIG composites have potential application in manufacturing of capacitors with high-permittivity and thermal-stability.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2008年第3期48-51,共4页
Ordnance Material Science and Engineering
关键词
介电常数
介电损耗
铁电铁磁复合材料
介电性能
permittivity
dielectric loss
ferroelectric and ferromagnetic composites
dielectric properties
