Synthesize CCTO Using Different Mixing Media

Abstract:

In recent years, there has been an increasing interest on high dielectric constant that have significant applications in electronic devices. Dielectric materials have many technological applications such as capacitors, resonators and filters. High dielectric ceramic capacitors based perovskite oxides are necessary for modern electronic devices and are found to be suitable for a wide range of applications. Subramanian et al. discovered the high dielectric constant of CaCu₃Ti₄O₁₂ (CCTO) ~ 10,000 at room temperature. CCTO has the cubic perovskite crystal structure and high dielectric constant of ~ 10⁴ up to 10⁵ at radio frequency and good temperature stability over a wide temperature range [1,2]. These properties were desired for various microelectronic applications. With the high dielectric constant, the material can store more charge and the values make CCTO an attractive material for ultra-high energy density capacitors. However, this properties can be accomplished if single phase of CCTO is formed. Many research have been done recently on the synthesis of the cubic perovskite CCTO and many techniques are working such as sol-gel route [3], combustion techniques [4], molten salt process [5] and etc., but this technique is difficult and complex process during sample preparation.

• Periodical: Materials Science Forum (Volume 840)
• Pages: 87-90
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.840.87
• Online since: January 2016
• Authors: Rosyaini Afindi Zaman, Mohamad Johari bin Abu, Saniah Abdul Karim, Julie Juliewatty Mohamed, Mohd Fadzil Ain, Zainal Arifin Ahmad
• Keywords: CaCu₃Ti₄O₁₂, Calcination, Mixing Medium, XRD

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