Nanoparticles of the giant dielectric material, calcium copper titanate from a sol-gel technique

被引：53

作者：

Jesurani, S. ^{[1
,2
]}

Kanagesan, S. ^{[1
]}

Velmurugan, R. ^{[1
]}

Thirupathi, C. ^{[1
]}

Sivakumar, M. ^{[1
]}

Kalaivani, T. ^{[1
]}

机构：

[1] SRM Univ, Ctr Mat Sci & Nano Devices, Dept Phys, Kattankulathur 603203, Tamil Nadu, India

[2] Jeyaraj Annapackium Coll Women, Dept Phys, Periyakulam 625601, Tamil Nadu, India

来源：

MATERIALS LETTERS | 2011年 / 65卷 / 21-22期

关键词：

Nanoparticles; Sol-gel preparation; XRD; AFM; Ceramics; Giant dielectric constant; CACU3TI4O12; CERAMICS; STOICHIOMETRY; CONSTANT;

D O I：

10.1016/j.matlet.2011.06.107

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The precursor of CaCu3Ti4O12 (CCTO) nano particles have been successfully synthesized by sol-gel method at 90 degrees C. The dried precursor powder was milled and then calcined at 450 degrees C, 550 degrees C, 650 degrees C, 800 degrees C, 850 degrees C and 950 degrees C for 3 h. The phase formation of CCTO was analyzed by step by step using FTIR and XRD. Particle size and shape were evaluated by AFM. The XRD results of the powder calcined at 800 degrees C indicated the formation of CCTO phase. AFM studies showed that average particle size of the CCTO powder range 90-120 nm. The absorption bands corresponding to vibrations of Ca-O, Cu-O and Ti-O-Ti were observed at 606, 525 and 463 cm(-1) using FTIR. The samples sintered at 1040 degrees C showed the densities as high as 96% of theoretical density. The grain sizes of sintered pellets were determined by FE-SEM. The dielectric properties of prepared samples were studied by LCR meter. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：3305 / 3308

页数：4

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