| Publication Type |
Journal Article |
| Title |
Permittivity and electric conductivity of aqueous alumina (40 nm) nanofluids at different temperatures |
| Authors |
R. Iglesias M. A. Rivas JC Reis T. P. Iglesias |
| Groups |
|
| Journal |
JOURNAL OF CHEMICAL THERMODYNAMICS |
| Year |
2015 |
| Month |
October |
| Volume |
89 |
| Number |
|
| Pages |
189-196 |
| Abstract |
Aiming to study the effect of nanoparticle size on electric properties, the effective relative permittivity and electric conductivity of suspensions of 40 nm particles of aluminium oxide (alumina) in base Milli-Q and Milli-Ro water were determined at six different temperatures in the range (298.15 to 348.15) K, and at eight different concentrations up to 7\% mass (2\% volume). Present results are compared with previously published values for the same colloids containing 15 nm particles. Empirical equations for describing the experimental data are given. This study demonstrates the importance of the particle size, volume fraction of nanoparticles, temperature and water purity on the effective relative permittivity and electric conductivity of alumina nanoparticles suspensions. Trends for changes in permittivity enhancement and in electric conductivity enhancement with temperature and concentration are examined and discussed. Classical theoretical models in the study of permittivity and conductivity are applied. A summary is given for the effect of size ((15 and 40) nm), concentration (0.25 to 2)\% volume and temperature (298.15 to 348.15) K on the behavior of these nanofluids. (C) 2015 Elsevier Ltd. All rights reserved. |
| DOI |
http://dx.doi.org/10.1016/j.jct.2015.05.021 |
| ISBN |
|
| Publisher |
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD |
| Book Title |
|
| ISSN |
0021-9614 |
| EISSN |
1096-3626 |
| Conference Name |
|
| Bibtex ID |
ISI:000357616800027 |
| Observations |
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