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Measurements of particle size distribution parameters in ferrofluids
Abstract
A method is presented by means of which (for a ferrofluid with a lognormal distribution of particle size) it is possible to determine the standard deviation (σ) and median particle diameter (Dv) from the room temperature magnetisation curve. The method has been applied to several commercial ferrofluids, containing ferrite particles, and to fluids consisting of cobalt particles in toluene prepared by the method of Hess and Parker. The particle size distributions have also been measured by using an electron microscope. It has been found that the magnetic data gives estimates of the 'magnetic size distribution' parameters Dvmand σm, which differed from the 'physical size distribution' parameters Dvpand σpobtained from electron microscope data. It is found that Dvp> Dvm, and\sigma_{p} < \sigma_{m}. These observations are consistent with the results of Kaiser and Miskolczy and Granqvist and Buhrman.
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Kratz, H., Taupitz, M., Ariza de Schellenberger, A., Kosch, O., Eberbeck, D., Wagner, S., Trahms, L., Hamm, B., & Schnorr, J. (2018) · PLoS ONE · doi:10.1371/journal.pone.0190214 · Cited by 92
Metadata
- Authors
- Chantrell, R., Popplewell, J., & Charles, S.
- Venue
- IEEE Transactions on Magnetics
- Published
- 1978-09
- Volume
- 14
- Issue
- 5
- Pages
- 975-977
- ISSN
- 0018-9464 (ISSN-L)
- OpenAlex
- W2069499937
- Cited by
- 718
- References
- 0
- FWCI
- 5.38
- Type
- journal article
- Language
- en
- Open access
- closed
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- Chantrell, R., Popplewell, J., & Charles, S. (1978). Measurements of particle size distribution parameters in ferrofluids. IEEE Transactions on Magnetics. https://doi.org/10.1109/tmag.1978.1059918
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