Dielectric and Electrical Transport Properties of the Fe~（3＋）-doped CaCu_3Ti_4O

材料科学技术（英）, 2012, 28(12): 1145-1150.

Dielectric and Electrical Transport Properties of the Fe~（3＋）-doped CaCu_3Ti_4O_（12）

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1.Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China

2.Institution of Sensors and Intelligent System and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China

3.Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China

4.Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China

5.Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China Key Laboratory for the Green Preparation and Application of Functional Materials of Ministry of Education, Hubei University, Wuhan 430062, China

6.Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China International Center for Materials Physics, Shenyang 110016, China

基金项目: the Huazhong University of Science and Technology, China(01-18-185011) support from the National Natural Science Foundation of China(.51172166 and 51202078)

关键词：电输运特性 , Fe , 介电性能 , 陶瓷表面 , 介电常数 , 介电损耗 , 接触电极 , 电气性能

Dielectric and Electrical Transport Properties of the Fe~(3+)-doped CaCu_3Ti_4O_(12)

Keywords： Ceramics dc electric current Dielectric properties Doping ,

CaCu(3-x)FexTi4O(12)(x=0, 0.015, 0.03, 0.045, 0.06) ceramics were synthesized by sol-gel method. The electrical conduction and dielectric measurements show that the doping of a very small amount of Fe(3+) ions greatly reduces the low-frequency dielectric constants and leakage, and enhances grain resistivity. For the doped samples, the appearance of the strong low-frequency peaks in the spectra of dielectric loss confirms that the doping of Fe(3+) ions induces the contact-electrode effect on ceramic surface. These great changes of electrical properties may originate from the reduced amount of oxygen vacancies by doping Fe(3+)

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Dielectric and Electrical Transport Properties of the Fe~（3＋）-doped CaCu_3Ti_4O_（12）

Dielectric and Electrical Transport Properties of the Fe~(3+)-doped CaCu_3Ti_4O_(12)

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