Enhanced dielectric properties of Zn and Mn co-doped CaCu₃Ti₄O₁₂ ceramics

详细信息    查看全文

• 作者：Zunping Xu ; Hua Qiang
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：28
• 期：1
• 页码：376-380
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1573-482X
• 卷排序：28

文摘

Zn-doped and (Zn+Mn) co-doped CaCu₃Ti₄O₁₂ ceramics were prepared by the citrate–nitrate combustion derived powders in order to investigate the effect of dopants on the microstructure and electrical properties. The results showed that giant dielectric response was enhanced by co-doping of Zn and Mn. Compared with other samples, (Zn+Mn) co-doped ceramics exhibit a fine-grained microstructure. Much stronger nonohmic properties were realized in these ceramics. It is significant that the (Zn+Mn) co-doping effectively reduced the dielectric loss in the medium frequency region and at room temperature. At x = 0.05 and y = 0.03, low dielectric loss ~0.026 and moderate dielectric constant ~6620 were observed at room temperature and 10 kHz. The present results indicate that (Zn+Mn) co-doping may improve the dielectric properties and increase the grain boundary resistance of CaCu₃Ti₄O₁₂.