Spherical iron oxide particles synthesized by an aerosol technique
- PDF / 1,884,698 Bytes
- 9 Pages / 576 x 792 pts Page_size
- 122 Downloads / 203 Views
particles synthesized by an aerosol technique M.V. Cabañas, M. ValletRegí, M. Labeau and J.M. GonzálezCalbet Journal of Materials Research / Volume 8 / Issue 10 / 1993, pp 2694 2701 DOI: 10.1557/JMR.1993.2694
Link to this article: http://journals.cambridge.org/abstract_S0884291400071867 How to cite this article: M.V. Cabañas, M. ValletRegí, M. Labeau and J.M. GonzálezCalbet (1993). Spherical iron oxide particles synthesized by an aerosol technique. Journal of Materials Research,8, pp 26942701 doi:10.1557/JMR.1993.2694 Request Permissions : Click here
Downloaded from http://journals.cambridge.org/JMR, IP address: 128.119.168.112 on 08 Sep 2012
Spherical iron oxide particles synthesized by an aerosol technique M. V. Cabanas Departamento de Quimica Inorgdnica y Bioinorgdnica, Facultad de Farmacia, Universidad Complutense, 28040-Madrid, Spain
M. Vallet-Regf) Departamento de Quimica Inorgdnica y Bioinorgdnica, Facultad de Farmacia, Universidad Complutense, 28040-Madrid, and Instituto de Magnetismo Aplicado, Las Rozas, 28230-Madrid, Spain
M. Labeau Laboratoire des Materiaux et du Genie Physique, URA 1109, INPG, 38402-St. Martin d'Heres, France
J. M. Gonzalez-Calbet Instituto de Magnetismo Aplicado, Las Rozas, 28230-Madrid, and Departamento de Quimica Inorgdnica, Facultad de Qulmicas, Universidad Complutense, 28040-Madrid, Spain (Received 25 February 1993; accepted 19 May 1993)
Spherical particles of several iron oxides have been obtained by pyrolysis of an aerosol generated by ultrahigh frequency spraying of a solution. Two different precursor solutions were used to produce the aerosol: Fe(NO 3 ) 3 • 9H 2 O and FeC 6 H 5 O 7 • 4H 2 O. The iron nitrate decomposition leads to the formation of a— Fe 2 O 3 , while the organic precursor pyrolysis leads to magnetic particles of either y—Fe2O3 or Fe3O4. Structural phase, particle size, texture, and homogeneity of the products so obtained can be controlled as a function of some synthesis conditions such as precursor solution, temperature, solution concentration, and surrounding atmosphere.
I. INTRODUCTION A considerable amount of work has been developed in the last decade on the properties of small magnetic particles. Since such properties depend on the texture, synthetic methods are of great importance, especially those leading to the preparation of small particles. Recently, the aerosol synthesis technique has been used to produce small magnetic particles of both iron oxide1 and barium ferrite.2-3 Its main advantage is that this technique has the potential to prepare particles of unique composition and magnetic behavior for which the starting materials are mixed in a solution at the atomic level. We describe in this paper the preparation of iron oxide particles by using an aerosol technique similar to that used for the thin film production4'5 in which we have modified the pyrolysis zone. II. EXPERIMENTAL Iron oxide powders have been prepared by an aerosol technique similar to that described for the synthesis of BaFei2Oi9 (Ref. 3) and SnO 2 . 6 A schematic repre
Data Loading...
