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Sintering Effects on Dielectric Properties of Zn-Doped CaCu3Ti4O12 Ceramic Synthesized by Modified Sol-Gel Route
- Authors
- SINGHLAXMAN; U. S. Rai; Alok Kumar Rai; K. D. Mandal; 이선영
- Issue Date
- Jan-2013
- Publisher
- 대한금속·재료학회
- Keywords
- sintering; grain size; dielectric properties; perovskites; capacitors
- Citation
- Electronic Materials Letters, v.9, no.1, pp.107 - 113
- Indexed
- SCIE
SCOPUS
KCI
OTHER
- Journal Title
- Electronic Materials Letters
- Volume
- 9
- Number
- 1
- Start Page
- 107
- End Page
- 113
- ISSN
- 1738-8090
- Abstract
- CaCu2.90Zn0.10Ti4O12 ceramic was synthesized by a novel semi-wet route and calcined at 800°C in air for 8 h. The obtained powder was divided into three parts and sintered in air at 950°C for 6 h, 8 h, and 12 h,separately. XRD results confirmed the single phase formation of all the sintered samples with similar cubic structure of CaCu3Ti4O12 (CCTO). Scanning electron micrographs of the CaCu2.9Zn0.1Ti4O12 ceramic sintered for 6 h shows bimodal grain size distribution. Increasing the sintering time significantly promotes the grain growth and microstructural densification. The sintering duration was found to have tremendous influence on microstructure and dielectric properties of CaCu2.90Zn0.10Ti4O12 ceramic. The CaCu2.9Zn0.1Ti4O12 ceramic sintered for 12 h exhibited high dielectric constant εr ~ 5971 at 1 kHz and room temperature. It is found that εr is independent at high frequency and weakly dependent on temperature.
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Related Researcher
- Lee, Sunyong Caroline
- ERICA 공학대학 (DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING)