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Vol. 32 No. 12 (2020): Vol 32 Issue 12, 2020

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Study of Sintering Temperature on Dielectric Properties of CaCu3Ti4O12 Materials Prepared by Sol-Gel Method

https://doi.org/10.14233/ajchem.2020.22926
W. Sue-Aok
Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
J. Khemprasit
Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand

Corresponding Author(s) : W. Sue-Aok

wirinratch.su@bru.ac.th

Asian Journal of Chemistry, Vol. 32 No. 12 (2020): Vol 32 Issue 12, 2020

Abstract

CaCu3Ti4O12 (CCTO) powder was prepared by sol-gel process using acetic acid as a solvent and also as cross-linking agent by varying the sintering temperature (1000-1150 ºC) for 3 h. The dried gels were characterized by TG-DTA and FT-IR techniques. The sintered samples were characterized by XRD, SEM techniques and impedance analyzer for dielectric properties measurement. The sample showed the perovskite structure with small amounts of TiO2 and CuO phases. The best dielectric properties (εr = 1.38 × 104 and tan δ = 0.13 at 10 kHz and room temperature) were observed in the CCTO pellets calcined at 800 ºC for 3 h and sintered at 1100 ºC for 3 h.

Keywords

CaCu3Ti4O12 Perovskite material Dielectric constant Sol-gel process Capacitor
Sue-Aok, W., & Khemprasit, J. (2020). Study of Sintering Temperature on Dielectric Properties of CaCu3Ti4O12 Materials Prepared by Sol-Gel Method. Asian Journal of Chemistry, 32(12), 3109–3112. https://doi.org/10.14233/ajchem.2020.22926
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