Effect of Calcination Temperature on the Breakdown Strength and Energy Density of CaCu3Ti4O12 Ceramic

Mohd Fariz Ab Rahman; Mohamad Johari bin Abu; Rosyaini Afindi Zaman; Julie Juliewatty Mohamed; Mohd Fadzil Ain; Mohamad Kamarol Mohd Jamil; Zainal Arifin Ahmad

doi:10.4028/www.scientific.net/MSF.888.23

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HomeMaterials Science ForumMaterials Science Forum Vol. 888Effect of Calcination Temperature on the Breakdown...

Effect of Calcination Temperature on the Breakdown Strength and Energy Density of CaCu₃Ti₄O₁₂ Ceramic

Abstract:

The effect of calcination temperature on the breakdown strength and energy density of CaCu₃Ti₄O₁₂ (CCTO) ceramics was studied. CCTO ceramics were prepared via solid state reaction method. The raw materials of CCTO were wet mixed for 24 hours and then dried overnight in oven. CCTO mixtures were calcined at three different temperature which is at 900°C, 930°C and 950°C for 12 hours. The calcined powders were compacted at 250 MPa and then were sintered at 1040°C for 10 hours. X-Ray Diffractometer (XRD) analysis showed the formation of CCTO phase and secondary phases of CuO and CaTiO₃ for C900 calcined powders but single phase of CCTO was obtained by C930 and C950 calcined powders. Single phase of CCTO also were seen for all sintered samples. Observation on Scanning Electron Microscopy (SEM) micrographs showed large grain size was seen in C900 sintered sample and finer grain size was observed for C930 and C950 sintered samples. C900 sintered sample obtained highest dielectric constant (8617), highest breakdown strength (7.92 kV/cm), highest energy density (2.392 J/cm³).

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Materials Science Forum (Volume 888)

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23-27

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.888.23

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March 2017

Authors:

Mohd Fariz Ab Rahman, Mohamad Johari bin Abu, Rosyaini Afindi Zaman, Julie Juliewatty Mohamed, Mohd Fadzil Ain, Mohamad Kamarol Mohd Jamil, Zainal Arifin Ahmad*

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CaCu₃Ti₄O₁₂, Calcination Temperature, Dielectric Properties

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