Preparation and characterization of CaCu3Ti4O12 powders by non-hydrolytic sol-gel method

被引：12

作者：

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

Zhang, Bo ^{[1
]}

Zhou, Fu ^{[1
]}

机构：

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

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

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2014年 / 70卷 / 01期

关键词：

CaCu3Ti4O12; Non-hydrolytic sol-gel; Dielectric properties; GIANT DIELECTRIC-CONSTANT; CERAMICS; NANOPARTICLES; ROUTES;

D O I：

10.1007/s10971-014-3274-z

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：

CaCu3Ti4O12 (CCTO) powders were prepared via a non-hydrolytic sol-gel (NHSG) method by using acetylacetone as chelating agent and ethylene glycol as solvent. The samples were characterized by TG-DSC, Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscope. The dielectric properties of ceramics were also measured. The pure perovskite-like CCTO powders were obtained by heat treatment at 800 A degrees C for 2 h. The average particle sizes of CCTO powders calcined at 800 A degrees C were approximately 350-450 nm. The samples sintered at 1,000 A degrees C showed the mean grain size of 2.5-4 mu m. Specially, the ceramics exhibited high dielectric constant (1.19 x 10(5)-1.40 x 10(5)) and low dielectric loss (0.051-0.1) in the temperature range of 30-110 A degrees C. Moreover, with the NHSG method the period of synthesis process was greatly shortened.

引用

页码：62 / 66

页数：5

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