Evaluation of Thermal Insulation Properties of Fibrous Mineral Fine Powders

Abstract:

The equivalent thermal resistance model of sepiolite mineral nanofibers has been presented in this paper to predict the thermal insulation properties of fibrous mineral fine powders. The model was based on the correlation between thermal conduction and gas & solid conduction in the fibrous system. According to the analysis about the process of heat transfer in sepiolite nanofibers, the total thermal conduction can be described as the synergism of the solid thermal conduction and the gaseous thermal conduction. From the equivalent thermal resistance model of fibrous materials in the accumulative condition, it can be seen that the thermal conduction of fibrous mineral fine powders can be evaluated by the relationship between bulk density and thermal conduction of sepiolite nanofibers. Comparing the theoretical values with experimental data obtained from thermal conduction instrument, it was found that the theoretical values corresponded well with experimental data.

• Periodical: Advanced Materials Research (Volume 178)
• Pages: 339-343
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.178.339
• Online since: December 2010
• Authors: Fei Wang, Jin Sheng Liang, Chong Yan Ren, Qing Guo Tang
• Keywords: Bulk Density, Evaluation, Mineral Fine Powders, Thermal Conduction, Thermal Insulation Properties

References

[1] N. Soheilnia, H. Xu and H. Q. Zhang, et al.: Chem. Mater. Vol. 19(2007), p.4063.

[2] A. L. Robinson, S. G. Buckley and L. L. Baxter: Energy Fuels. Vol. 15(2001), p.66.

[3] A. A. Balandin, S. Ghosh and W.Z. Bao, et al.: Nano Lett. Vol. 8(2008), p.902.

[4] I. M. Marrucho, N. S. Oliveira and R. Dohrn: J. Chem. Eng. Data. Vol. 47(2002), p.554.

[5] M. E. Itkis, F. Borondics and A. P. Yu, et al.: Nano Lett. Vol. 7(2007), p.900.

[6] E. J. Rosenbaum, N. J. English and J. K. Johnson, et al.: J. Phys. Chem. B Vol. 111(2007), p.13194.

[7] C. W. Padgett, O. Shenderova and D. W. Brenner: Nano Lett. Vol. 6(2006), p.1827.

[8] S. H. Chen: Langmuir Vol. 15(1999), p.8618.

[9] E. Kumpinsky: Ind. Eng. Chem. Res. Vol. 42(2003), p.5931.

[10] C. L. Jackson, G. B. Mckenna: Chem. Mater. Vol. 8(1996), p.2128.

[11] J. D. Ferguson, A. W. Weimer and S. M. George: Chem. Mater. Vol. 16(2004), p.5602.

[12] M. A. Presley and P. R. Christensen: J. Geophysi. Res. Vol. 102(1997), p.9221.

[13] Y. Q. Li, H. Ishida: Chem. Mater. Vol. 14(2002), p.1398.

[14] A. C. Hoffman and H. J. Finkers: Powder Technol. Vol. 92(1997), p.185.

[15] S. Y. Zhao, B. M. Zhang and S. Y. Du: J. Int. J. Therm. Sci. Vol. 48(2009), p.1302.

[16] F. Wang, J. S. Liang and Q. G. Tang, et al.: J. Nanosci. Nanotechnol, 9(2009) in press.

[17] K. Murata: Int. J. Heat Mass Transfer. Vol. 38(1995), p.3253.

[18] N. Du, J. T. Fan and H. J. Wu, et al.: Int. J. Heat Mass Transfer. Vol. 52(2009), p.4350.