STRUCTURAL AND MICROSTRUCTURAL INVESTIGATION OF NANO-SIZED CALCIUM-COPPER-TITANATE DIELECTRIC PREPARED BY MECHANOCHEMICAL ROUTE

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AHMADI H.; ALIZADEH M.; AMINI R.; GHAZANFARI M.R.; GHAFFARI M.

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Journal: JOURNAL OF NEW MATERIALS Year:2011 | Volume:1 | Issue:4 Page(s): 53-61

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Title

STRUCTURAL AND MICROSTRUCTURAL INVESTIGATION OF NANO-SIZED CALCIUM-COPPER-TITANATE DIELECTRIC PREPARED BY MECHANOCHEMICAL ROUTE

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Keywords

NANOPARTICLEQ2

CRYSTALLITE SIZEQ3

AMORPHOUSQ3

DIELECTRICQ3

MECHANOCHEMICALQ3

Abstract

In this study, the formation of calcium-cupper-titanate (CCTO) perovskite powder by mechanical alloying of the constituent oxides under air atmosphere at ambient temperature was investigated. By applying a relatively low-energy ball milling, the reaction sequence was identified. The chemical composition of the as-milled powders was evaluated by X-ray florescence analysis. The qualitative and quantitative structural analysis was performed by X-ray method using the Rietveld refinement. Moreover, the particle size evolution was studied by transmission electron microscopy. The mechano-synthesis of CaO, CuO, and TiO2 led to the formation of perovskite CCTO, where negligible contamination due to milling was detected. In the early stages of milling, the particle size reduction, the nanostructure formation, and a high degree of amorphization were observed. It was also found that the rate of amorphization is different in the constituent oxides. In the middle stage of milling a fully AMORPHOUS structure was formed and since the AMORPHOUS composition reached the CCTO composition, the CCTO phase was nucleated from the AMORPHOUS phase in the final stage of milling. The TEM micrograph shows the CCTO particle size is in range of 10-35nm.

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APA: Copy

AHMADI, H., ALIZADEH, M., AMINI, R., GHAZANFARI, M.R., & GHAFFARI, M.. (2011). STRUCTURAL AND MICROSTRUCTURAL INVESTIGATION OF NANO-SIZED CALCIUM-COPPER-TITANATE DIELECTRIC PREPARED BY MECHANOCHEMICAL ROUTE. JOURNAL OF NEW MATERIALS, 1(4), 53-61. SID. https://sid.ir/paper/169951/en

Vancouver: Copy

AHMADI H., ALIZADEH M., AMINI R., GHAZANFARI M.R., GHAFFARI M.. STRUCTURAL AND MICROSTRUCTURAL INVESTIGATION OF NANO-SIZED CALCIUM-COPPER-TITANATE DIELECTRIC PREPARED BY MECHANOCHEMICAL ROUTE. JOURNAL OF NEW MATERIALS[Internet]. 2011;1(4):53-61. Available from: https://sid.ir/paper/169951/en

IEEE: Copy

H. AHMADI, M. ALIZADEH, R. AMINI, M.R. GHAZANFARI, and M. GHAFFARI, “STRUCTURAL AND MICROSTRUCTURAL INVESTIGATION OF NANO-SIZED CALCIUM-COPPER-TITANATE DIELECTRIC PREPARED BY MECHANOCHEMICAL ROUTE,” JOURNAL OF NEW MATERIALS, vol. 1, no. 4, pp. 53–61, 2011, [Online]. Available: https://sid.ir/paper/169951/en

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