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Role of mixing mediums in the synthesis of single phase CaCu3Ti4O12 (CCTO)
Rosyaini Afindi Zaman,Wan Fahmin Faiz Wan Ali,Mohamad Johari Abu,Julie Juliewatty Mohamed,Mohd. Fadzil Ain,Zainal Arifin Ahmad 한양대학교 세라믹연구소 2016 Journal of Ceramic Processing Research Vol.17 No.6
The role of mixing mediums on synthesizing high purity CCTO as a function of calcination temperature was systematicallyinvestigated via solid state reaction (SSR) route. The efficacy of the mediums (ethanol, deionised water, distilled water, and drymix) was primarily determined by X-ray diffraction (XRD) technique and FESEM, respectively. It is found that, a single phaseCCTO was successfully synthesized in all mediums, with the deionised water showed the lowest reaction temperature (950 oC)to fully crystallize the powder mixtures compared to other mediums. No significant changes were seen in the grain shape sinceonly a bimodal structure with grain size ranging from 0.5 μm to 2.57 μm was observed. The effect of media was also seen intheir dielectric properties of the calcined powders. Dry mixing (DM) had the highest dielectric permittivity (εr = 118) whereasothers are only between 59-99. Therefore, this observation proved that mixing medium could influence the formationtemperature and dielectric properties of CCTO.