Co^(2+)替代Bi^(3+)对Bi_2(Zn_(1/3)Nb_(2/3))_2O_7陶瓷介电性能的影响

On the Influence of Ceramic Dielectric Properties of Bi_2(Zn_(1/3)Nb_(2/3))_2O_7 with Bi!(3+) Substituted by Co^(2+)

研究了Co2+替代Bi3+对Bi2O3-Zn O-Nb2O5系介质材料结构和性能的影响,并借助X射线、LCR4284测试仪对其相结构和介电性能进行分析。研究结果表明,Co掺杂的样品能够显著地降低烧结温度至880℃,随着Co2+替代量的增加,Bi2O3-Zn O-Nb2O5系介质材料介电常数、介电损耗逐渐增大,样品的温度系数随掺杂量的增加而增大。

The structure and dielectric properties of substituting Co2+ for Bi3+ about Bi2(Zn1/3Nb2/3)2O7 based ceramics were investigated. X-ray diffraction, Agilent 4284 resistance analytical equipment were used to characterize the substitution. The effects of cationic substitution of Co2+ for in the A site on Bi2-xCox(Zn1/3Nb2/3)2O7 ceramics phase structure and dielectric properties were investigated. The results revealed that Bi2-xCox(Zn1/3Nb2/3)2O7 ceramics can decrease the sintering temperature remarkably(from 960 ℃ to 880 ℃); The dielectric constant and dielectric loss are gradually increased with the change of Co2+ additives. The temperature coefficient of the dielectric constant increased gradually with substitution of Co2+.