La-Doped CaCu₃Ti₄O₁₂ Ceramics Sintered in Argon Environment

Abstract:

The properties of undoped and La-doped CaCu3Ti4O12 ceramics synthesized via solid state reaction under argon environment had been studied. It was found that La-doped CCTOs gave higher dielectric constant and lower dielectric loss than undoped CCTO. X-ray diffraction (XRD) analysis indicated that all of the sintered samples have single-phase cubic structure (space group ). A minor shifted was observed in the peak positions for La-doped samples, which are attributed to the lattice expansion. The lattice parameter obtained from XRD analysis is 7.348 Å for undoped CCTO and increases to 7.348 – 7.377 Å for La-doped CCTOs. The results proven that La ions have effectively substituted into the Ca site of CCTO.

• Periodical: Advanced Materials Research (Volume 173)
• Pages: 167-172
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.173.167
• Online since: December 2010
• Authors: N. Shafiza Afzan Sharif, Sabar Derita Hutagalung, Zainal A. Ahmad
• Keywords: Argon Environment, CaCu₃Ti₄O₁₂ (CCTO), Dielectric Property, Grain Growth, La Doped

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