Synthesis of nanostructured perovskite powders via simple carbonate co-precipitation |
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Authors: | Cinzia Cristiani Giovanni Dotelli Mario Mariani Renato Pelosato Luca Zampori |
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Affiliation: | 1. Dipartimento di Chimica Materiali e Ingegneria Chimica “G. Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milano, Italy 2. Dipartimento di Energia, Politecnico di Milano, Via Lambruschini 4, 20156, Milano, Italy
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Abstract: | A very simple, cost-effective, chloride- and alkali-free, carbonate co-precipitation synthesis in aqueous medium was applied in the preparation of perovskite-type lanthanum manganese oxide-based powders, i.e. La0.70Sr0.30MnO3?δ (LSM) and La0.75Sr0.25Cr0.5Mn0.5O3?δ (LSCrM). The precursors so obtained yielded nano-structured perovskite oxides when treated at 900°C and 800°C, respectively. The measured BET surface areas were in the low-end range for high temperature oxides (4 m2 g?1 and 10 m2 g?1) but the X-ray crystallite size was as low as 50 nm for LSCrM and 90 nm for LSM. |
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