Ti^(4+)取代Zn^(2+)、Nb^(5+)对Bi_2O_3-ZnO-Nb_2O_5系介质材料结构和性能的影响

Effect of Ti^(4+) substation on the structure and dielectric properties of Bi_2O_3-ZnO-Nb_2O_5 based ceramics

研究了Ti4+ 取代Zn2 + 、Nb5+ 对Bi2 O3 ZnO Nb2 O5系介质材料结构和性能的影响。研究表明 ,少量替代对于材料的结构和性能没有太大的影响 ;随着替代量的增加 ,相结构中出现正交Bi4Ti3 O12 相 ;微观形貌中出现棒晶 ;介电常数逐渐增大 ,温度系数逐渐向负温度系数方向移动。适量Ti4+ 替代可以获得性能很好的NP0介质材料。

Effect of Ti 4+ substation on the structure and dielectric properties of Bi 2O 3 ZnO Nb 2O 5 based ceramics were investigated. The phase and microstructure varies slightly after a little substation. With the increasing of Ti 4+ substation, orthorhombic Bi 4Ti 3O 12 phase appears and some club shaped crystal come forth correspondingly. Further study shows that increasing the value of Ti 4+ substation increase dielectric constant and make temperature coefficient of dielectric constant decrease to negative. The result of dielectric behaviors indicates that proper Ti 4+ substation can be an effective way to get NP0 dielectric materials.