Ferrimagnetic paper obtained by in situ synthesis of substituted ferrites

Author

Carrazana-Garcia, Jorge A. ; Lopez-Quintela, M.A. ; Rey, Jose Rivas

Author_Institution

Dept. of Phys. Chem., Santiago de Compostela Univ., Spain

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

3126

Lastpage

3130

Abstract

A procedure for producing magnetic paper by in situ synthesis of substituted (Co, Ni) ferrites is described. Ferrites are formed in the presence of cellulose fibers and then forced to enter into the fiber lumen where they stay protected from mechanical influences. The remaining particles are washed out of the fibers leaving its external surface clean, so that its papermaking properties are not affected. Multilayer papers were prepared in which the colored magnetic layer is hidden behind white printable surfaces. Finally, the magnetic properties of the different kinds of obtained papers are compared with typical commercial standards, like subway tickets and airport boarding passes

Keywords

cobalt compounds; coercive force; ferrites; fibre reinforced composites; magnetisation; materials preparation; nickel compounds; paper; remanence; thermal analysis; CoFe₂O₄; NiFe₂O₄; TGA; airport boarding passes; cellulose fibers; coercive field; colored magnetic layer; ferrimagnetic paper; fiber lumen; in situ synthesis; magnetic properties; multilayer papers; papermaking properties; remanent magnetization; saturation magnetization; substituted ferrites; subway tickets; white printable surfaces; Airports; Chemicals; Ferrimagnetic materials; Ferrites; Magnetic properties; Paper pulp; Powders; Saturation magnetization; Sugar industry; Surface cleaning;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.490303

Filename

490303