ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Synthesis of nanostructured perovskite powders via simple carbonate co-precipitation

Cinzia Cristiani, Giovanni Dotelli, Mario Mariani, Renato Pelosato, and Luca Zampori

Dipartimento di Chimica Materiali e Ingegneria Chimica “G. Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milano, Italy

E-mail: cinzia.cristiani@polimi.it

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. La_0.70Sr_0.30MnO_3−δ (LSM) and La_0.75Sr_0.25Cr_0.5Mn_0.5O_3−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.

Keywords: perovskite – nanostructure – co-precipitation – synthesis

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-013-0306-z

Chemical Papers 67 (5) 526–531 (2013)