Light scattering for aerogel characterization
Abstract
Light scattering is a useful tool to evaluate aerogel clarity, study its structure, pore size, mechanical strain, and examine the modes of sol-gel evolution that determine its microstructure. Ultraviolet-visible transmission spectroscopy can be used to study the wavelength dependent scattering to readily compare aerogels of differing origins, thickness, and to evaluate effects of residual contaminants. Infrared reflectance measurements can be used to determine the effective real and imaginary indices of refraction of porous aerogel materials for material property and radiant heat transfer studies. Measurements of scattering at a fixed angle can be used for quality control, to evaluate sources of scattering, and study inhomogeneities. Measurement of the Mueller matrix (describing the 16-element angle-dependent transformation of intensity and polarization of incident to scattered light) provides information about the anisotropy, large pore fraction, induced stresses, microstructure and inhomogeneities in the aerogel. The time evolution of scattering before and after gel formation gives information.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab., CA (US)
- Sponsoring Org.:
- USDOE Assistant Secretary for Energy Efficiency and Renewable Energy. Office of Transportation Technologies. Office of Advanced Automotive Technologies (US)
- OSTI Identifier:
- 773769
- Report Number(s):
- LBNL-43696
Journal ID: ISSN 0022-3093; JNCSBJ; R&D Project: 488901; TRN: AH200106%%19
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Journal Article
- Journal Name:
- Journal of Non-Crystalline Solids
- Additional Journal Information:
- Journal Volume: 225; Journal Issue: 1; Other Information: PBD: 8 Jul 1999; Journal ID: ISSN 0022-3093
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; LIGHT SCATTERING; GELS; MICROSTRUCTURE; POROSITY; MECHANICAL PROPERTIES; SPECTROSCOPY
Citation Formats
Hunt, A J. Light scattering for aerogel characterization. United States: N. p., 1999.
Web.
Hunt, A J. Light scattering for aerogel characterization. United States.
Hunt, A J. Thu .
"Light scattering for aerogel characterization". United States.
@article{osti_773769,
title = {Light scattering for aerogel characterization},
author = {Hunt, A J},
abstractNote = {Light scattering is a useful tool to evaluate aerogel clarity, study its structure, pore size, mechanical strain, and examine the modes of sol-gel evolution that determine its microstructure. Ultraviolet-visible transmission spectroscopy can be used to study the wavelength dependent scattering to readily compare aerogels of differing origins, thickness, and to evaluate effects of residual contaminants. Infrared reflectance measurements can be used to determine the effective real and imaginary indices of refraction of porous aerogel materials for material property and radiant heat transfer studies. Measurements of scattering at a fixed angle can be used for quality control, to evaluate sources of scattering, and study inhomogeneities. Measurement of the Mueller matrix (describing the 16-element angle-dependent transformation of intensity and polarization of incident to scattered light) provides information about the anisotropy, large pore fraction, induced stresses, microstructure and inhomogeneities in the aerogel. The time evolution of scattering before and after gel formation gives information.},
doi = {},
url = {https://www.osti.gov/biblio/773769},
journal = {Journal of Non-Crystalline Solids},
issn = {0022-3093},
number = 1,
volume = 225,
place = {United States},
year = {1999},
month = {7}
}
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