Microstructure and dielectric properties of Nd doped CaCu3Ti4O12 synthesized by sol-gel method

被引：6

作者：

Wang, Mao-Hua ^{[1
,2
]}

Zhang, Bo ^{[1
,2
]}

Zhou, Fu ^{[1
,2
]}

Yao, Chao ^{[1
,2
]}

机构：

[1] Changzhou Univ, Jiangsu Prov Key Lab Fine Petrochem Ind, Changzhou 213164, Jiangsu, Peoples R China

[2] Changzhou Univ, Sch Chem & Chem Engn, Changzhou 213164, Jiangsu, Peoples R China

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2014年 / 69卷 / 02期

关键词：

CaCu3Ti4O12; Doping; Nd; Dielectric properties; CONSTANT; CERAMICS; BEHAVIOR;

D O I：

10.1007/s10971-013-3213-4

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ca(1-3x/2)Nd (x) Cu3Ti4O12 (x = 0, 0.1, 0.2 and 0.3) powders and ceramics were prepared by sol-gel method. Effect of Nd on microstructure and dielectric properties were investigated. XRD patterns suggest that pure perovskite-like CCTO phase were obtained after calcining at 800 A degrees C for 2 h. SEM pictures reveal that particle size monotonously decreases from 250 to 120 nm with increase of Nd concentration. The lattice parameters show an increasing trend with the enhancing amount of Nd3+ substitution. The average grain size of CCTO ceramics decrease from 2.0 to 0.8 mu m with increase in Nd doping, which indicates that high concentration of Nd inhibits grain growth of CaCu3Ti4O12. Both of the dielectric constant and dielectric loss decrease with increase in Nd concentrations. Ca(1-3x/2)Nd (x) Cu3Ti4O12 ceramics with x = 0.3 shows the lowest dielectric constant of 1.12 x 10(4) as well as the lowest dielectric loss value of 0.12 at 20 A degrees C(10 kHz).

引用

页码：281 / 287

页数：7

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