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Synthesis of nickel–chromium–zinc ferrite powders from stainless steel pickling liquors

Published online by Cambridge University Press:  31 January 2011

Aurora López-Delgado ,
Felix A. López ,
José L. Martín de Vidales  and
Eladio Vila
Aurora López-Delgado
Affiliation:
Departmento de Reciclado de Materiales Centro Nacional de Investigaciones Metalúrgicas (CSIC), Avda. Gregorio del Amo 8, E-28040 Madrid, Spain
Felix A. López*
Affiliation:
Departmento de Reciclado de Materiales Centro Nacional de Investigaciones Metalúrgicas (CSIC), Avda. Gregorio del Amo 8, E-28040 Madrid, Spain
José L. Martín de Vidales
Affiliation:
Facultad de Ciencias (C-VI), UAM, Cantoblanco, E-28049 Madrid, Spain
Eladio Vila
Affiliation:
Instituto de Ciencia de Materiales de Madrid (CSIC), Cantoblanco, E-28049 Madrid, Spain
*
a) Address all correspondence to this author. flopez@fresno.csic.es
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Abstract

A low-temperature method was used to synthesize a nickel–chromium–zinc ferrite from stainless steel pickling liquor, a waste product of the steel industry, which is listed in most industrialized countries as a toxic and hazardous waste. This article reports the recovery (as a valuable ferric product) of the total metal content of this waste (namely, iron, chromium, nickel, and minor manganese), by coprecipitation of the multi-ionic solution and Zn2+ (provided by ZnO) with 1 M n-butylamine at room temperature. The spinel-type ferrite produced was characterized by x-ray diffraction, thermogravimetric analysis and differential scanning calorimetry, and scanning electron microscopy. Its recorded magnetization of 2600 emu cm−3 allows its use in different magnetic applications. Furthermore, the synthesis method is a low-cost technology that yields a more environmentally friendly final effluent.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 8 , August 1999 , pp. 3427 - 3432
Copyright
Copyright © Materials Research Society 1999

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References

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