Synthesis and Mössbauer characterization of Cu and Cr doped magnetites

ABSTRACT: A detailed Móssbauer investigation of magnetites prepared under different hydrothermal conditions and doped with Cu and Cr is presented. The samples were characterized by means of room temperature Móssbauer spectrometry, infrared spectroscopy, and X-ray diffraction. Móssbauer results show that the hydrothermal method produces highy stoichiometric and relativelly well-crystallized magnetites. The results suggest that the best samples are obtained when the alkaline solution is added quickly to the ferrous solution. It was also found that mixing the solutions under constant ultrasonic stirring produce magnetites with slightly better crystallinity and stoichiometry than the samples produced under magnetic or nitrogen bubbling stirring. The effect of the Cu and Cr on the hyperfine parameters is also presented and discussed.

• Autores: Barrero Meneses, Cesar Augusto; Morales Aramburo, Alvaro Luis; Mazo Zuluaga, Johan; Jaramillo Isaza, Franklyn; Pérez, Gabriel; Escobar Sierra, Diana Marcela; Arroyave Posada, Carlos Enrique; Tobón Gómez, Jorge Enrique; Montoya Izquierdo, Paula Marcela; Osorio Orozco, Luis Felipe; Vandenberghe, R E; Greneche, J M
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2003
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/27076
• Acceso en línea: http://hdl.handle.net/10495/27076
• Palabra clave: Cobre; Copper; Cromo; Chromium; Espectroscopía de Mossbauer; Mossbauer spectroscopy; Espectroscopia de infrarrojos; Infrared spectroscopy; Síntesis química; Chemical synthesis; Magnetita dopada; Productos de corrosión
• Rights: openAccess
• License: http://creativecommons.org/licenses/by/2.5/co/