The sigmoidal average - a powerful tool for predicting the thermal conductivity of composite ceramics
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F12%3A43894496" target="_blank" >RIV/60461373:22310/12:43894496 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/1742-6596/395/1/012021" target="_blank" >http://dx.doi.org/10.1088/1742-6596/395/1/012021</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1742-6596/395/1/012021" target="_blank" >10.1088/1742-6596/395/1/012021</a>
Alternative languages
Result language
angličtina
Original language name
The sigmoidal average - a powerful tool for predicting the thermal conductivity of composite ceramics
Original language description
The sigmoidal average between the upper and lower Hashin-Shtrikman bounds is shown to be the appropriate average relation for isotropic two-phase composites consisting of geometrically equivalent grains. This average ensures that the prediction is closethe upper bound for low volume fractions of the low-conductivity phase (corresponding to low-conductivity inclusions in a high-conductivity matrix) and vice versa. In the intermediate concentration range the sigmoidal average reflects the fact that the microstructure is bicontinuous and can undergo a percolation-type transition. It is shown that the sigmoidal average of the Hashin-Shtrikman bounds lies automatically within the three-point bounds (Miller bounds) for a practically important class of microstructures (symmetric-cell materials with spherical cells) and that in the infinite-phase-contrast case (porous media) it is close to the exponential relation, which has been very successful in describing the porosity dependence of proper
Czech name
—
Czech description
—
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JH - Ceramics, fire-proof materials and glass
OECD FORD branch
—
Result continuities
Project
<a href="/en/project/GAP108%2F12%2F1170" target="_blank" >GAP108/12/1170: Porous Ceramics with Tailored Elasticity and Thermal Conductivity</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physics: Conference Series
ISSN
1742-6596
e-ISSN
—
Volume of the periodical
395
Issue of the periodical within the volume
neuveden
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
"012021 '1"-"8'"
UT code for WoS article
—
EID of the result in the Scopus database
—