關鍵字查詢 | 類別:期刊論文 | | 關鍵字:Novel reaction mechanism for the synthesis of Ba2Ti9O20 materials prepared from nano-sized oxides

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1 94/1 物理系 林諭男 教授 期刊論文 發佈 Novel reaction mechanism for the synthesis of Ba2Ti9O20 materials prepared from nano-sized oxides , [94-1] :Novel reaction mechanism for the synthesis of Ba2Ti9O20 materials prepared from nano-sized oxides期刊論文Novel reaction mechanism for the synthesis of Ba2Ti9O20 materials prepared from nano-sized oxides林諭男; Lin, I-nan; 朱立文; Chu, Li-wen; Hsiue, Ging-ho; Lin, I-nan; Chen, Yi-chun淡江大學物理學系Institute of Physics (IOP)Nanotechnology 17(1), pp.185-191In this work, the phase evolution during calcinations of a BaTiO3 and TiO2 mixture was investigated. Based on the observations, a model for the reaction sequence of the phases was proposed and a modified process was suggested, namely to synthesize Ba2Ti9O20 materials utilizing a BaTi4O9 and BaTi5O11 mixture, instead of a BaTiO3 and TiO2 mixture, as starting materials. The phase transformation kinetics is thus greatly enhanced by this process. While the reaction of the 2BaTiO3+7TiO2 mixture requires 1100 °C/4 h to transform completely into the Ba2Ti9O20 Hollandite-like phase, it needs only 1000 °C/4 h to fulfil the phase transformation process in the Ba
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