Formation of LaFeO3 and thermal decomposition reactions in lanthanum(III) oxalate–iron(II) oxalate crystalline mixture

Autor:	A. O. Al-Youbi, Shaeel A. Al-Thabaiti, Suliman N. Basahel, S. S. Ata-Allah, M. A. Gabal
Rok vydání:	2006
Předmět:	Materials science Mechanical Engineering Thermal decomposition Inorganic chemistry Iron oxide Iron(II) oxalate Oxalate law.invention Thermogravimetry chemistry.chemical_compound chemistry Mechanics of Materials Iron oxalate law Differential thermal analysis General Materials Science Calcination
Zdroj:	Journal of Materials Science. 41:7597-7603
ISSN:	1573-4803 0022-2461
Popis:	Thermal processes involved during the decomposition course of La2(C2O4)3·10H2O–FeC2O4·2H2O (1:2 mole ratio) mixture up to 750 °C, in an atmosphere of air, were monitored by thermogravimetry and differential thermal analysis. X-ray diffraction and Mossbauer spectroscopy were used to characterize the intermediates and the final product. The results showed that a microcrystalline or possibly amorphous iron(III) oxide with a paramagnetic nature was appeared in the early stages of decomposition at 250 °C. By increasing the temperature, a well crystalline hematite with ferromagnetic properties was obtained. XRD pattern of the mixture calcined at 1100 °C shows the formation of LaFeO3 single phase in consistent with the hyperfine magnetic splitting (one sextet of lines) characteristic of LaFeO3 obtained in the Mossbauer spectra of the mixture calcined at the same temperature.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f4a5fd53f272433f5ab54d697d561a22 https://doi.org/10.1007/s10853-006-0848-3 Zobrazit plný text záznamu