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《Journal of Sichuan University of Science & Engineering(Natural Science Edition)》 2014-01
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Improvement of Stability and Measurement of Volume Fraction of Ionic Ferrofluids

BAI Lang;Department of Material Engineering,Panzhihua University;  
The preparing process of ionic ferrofluids is researched,and the stability of ferrofluids is improved by sedimentation and centrifugation.It can be concluded from TEM photograph and size analysis that the aggregation and big particles can be removed by centrifugation,and the polydispersity of particles size distribution can be improved,therefore the ionic ferrofluids can exist stably for long time.The density of ferrofuids is measured and analyzed,the results show that after Fe(NO_3)_3 treated,CoFe_2O_4 has been coated with a very thin antiacid layer,the shape and diameter distribution of particles are not change obviously.The volume fraction of ionic fermofluids based on water can be determined accurately by evaporation.
【CateGory Index】: O482.54
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