NDLI: Radiative Properties of Silica Nanoporous Matrices

Content Provider	Springer Nature Link
Author	Lallich, Sylvain Enguehard, Franck Baillis, Dominique
Copyright Year	2008
Abstract	Superinsulating materials are currently of much interest because of the price of energy on the one hand and CO$_{2}$ emissions attributed to offices and houses cooling and heating on the other hand. In this work, we aim at understanding and modeling the radiative transfer within silica nanoporous matrices that are the principal components of nanoporous superinsulating materials. We first elaborate samples of various thicknesses from a pyrogenic silica powder. These samples are characterized using two spectrophotometers on the whole wavelength range [250 nm; 20 μm]. Using a parameter identification technique, we compute the radiative properties of the various samples. Then, our samples being made of packed quasi-spherical particles, we use the Mie theory to model the radiative properties of these materials. Due to the observed discrepancies between the experimental radiative properties and those computed from the Mie theory with a uniform value of 10 nm for the scatterer diameter (value derived from TEM images), we determine an effective scatterer diameter that allows a good agreement between the experimental radiative properties and the Mie results. Nevertheless, in the short wavelength range, the Mie theory gives results that significantly differ from the experimental radiative properties. This behavior is attributed to structure effects as the wavelength is of the same order of magnitude as the diameter of the scatterer that is now regarded as an aggregate of nanoparticles. Hence, to take into account these effects, we use the discrete dipole approximation (DDA). The DDA extinction coefficient spectra appear to be much closer to the experimental results than the Mie spectra, and these first results are quite encouraging.
Starting Page	1395
Ending Page	1407
Page Count	13
File Format	PDF
ISSN	0195928X
Journal	International Journal of Thermophysics
Volume Number	29
Issue Number	4
e-ISSN	15729567
Language	English
Publisher	Springer US
Publisher Date	2008-07-02
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nanostructured materials Radiative properties Mie theory Discrete dipole approximation Physical Chemistry Industrial Chemistry/Chemical Engineering Mechanics Condensed Matter
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Multi-scale Modeling of Radiation Heat Transfer through Nanoporous Superinsulating Materials

Measurements and Modeling of the Spectral and Directional Radiative Properties of Micro/Nanostructured Materials

Characterization of the Pore Structure of Ceramics via Propagation of Light and Infrared Radiation

Radiative Properties of Uranium Dioxide Near Its Melting Point

Experimental Determination and Modeling of the Radiative Properties of Silica Nanoporous Matrices

Photon–Phonon Interactions in Nanostructured Systems

Analysis of Gas Molecule Mean Free Path and Gaseous Thermal Conductivity in Confined Nanoporous Structures

Thermal Transport Properties of Functionally Graded Carbon Aerogels

Thermal Radiative Properties and Temperature Measurement from Turbine Coatings

Radiative Properties of Silica Nanoporous Matrices

Similar Documents

Multi-scale Modeling of Radiation Heat Transfer through Nanoporous Superinsulating Materials

Measurements and Modeling of the Spectral and Directional Radiative Properties of Micro/Nanostructured Materials

Characterization of the Pore Structure of Ceramics via Propagation of Light and Infrared Radiation

Radiative Properties of Uranium Dioxide Near Its Melting Point

Experimental Determination and Modeling of the Radiative Properties of Silica Nanoporous Matrices

Photon–Phonon Interactions in Nanostructured Systems

Analysis of Gas Molecule Mean Free Path and Gaseous Thermal Conductivity in Confined Nanoporous Structures

Thermal Transport Properties of Functionally Graded Carbon Aerogels

Thermal Radiative Properties and Temperature Measurement from Turbine Coatings

Radiative Properties of Silica Nanoporous Matrices