About: Conductivity of porous materials with spheroidal pores

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Models predicting the conductivity of porous materials with spheroidal insulating pores are summarized and a new model, based on our exponential relation, is proposed. Using the well-known single-inclusion solution for spheroids, Maxwell coefficients (%22intrinsic conductivities%22) are calculated in dependence of the pore aspect ratio for isotropic microstructures with randomly oriented spheroidal pores, and implemented into the three traditional effective medium approximations (Maxwell-type, self-consistent, differential) and our exponential relation. As expected, all models predict that prolate pore shape has a very small influence on the porosity dependence, while oblate pores affect the porosity dependence ofconductivity significantly. However, the self-consistent predictions are linear and imply spurious percolation thresholds, whereas Maxwell-type and differential models (power-law relations) are known to provide predictions that are unrealistically high for the special case of spherical pore shape. Thus, our exponential relation seems to be currently the most suitable relation for implementing the single-inclusion solution for spheroids. Models predicting the conductivity of porous materials with spheroidal insulating pores are summarized and a new model, based on our exponential relation, is proposed. Using the well-known single-inclusion solution for spheroids, Maxwell coefficients (%22intrinsic conductivities%22) are calculated in dependence of the pore aspect ratio for isotropic microstructures with randomly oriented spheroidal pores, and implemented into the three traditional effective medium approximations (Maxwell-type, self-consistent, differential) and our exponential relation. As expected, all models predict that prolate pore shape has a very small influence on the porosity dependence, while oblate pores affect the porosity dependence ofconductivity significantly. However, the self-consistent predictions are linear and imply spurious percolation thresholds, whereas Maxwell-type and differential models (power-law relations) are known to provide predictions that are unrealistically high for the special case of spherical pore shape. Thus, our exponential relation seems to be currently the most suitable relation for implementing the single-inclusion solution for spheroids. (en)
Title	Conductivity of porous materials with spheroidal pores Conductivity of porous materials with spheroidal pores (en)
skos:prefLabel	Conductivity of porous materials with spheroidal pores Conductivity of porous materials with spheroidal pores (en)
skos:notation	RIV/60461373:22310/14:43898224!RIV15-GA0-22310___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GAP108/12/1170)
http://linked.open...iv/cisloPeriodika	11
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Gregorová, Eva Pabst, Willi
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemické technologie
http://linked.open...dnocenehoVysledku	8589
http://linked.open...ai/riv/idVysledku	RIV/60461373:22310/14:43898224
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Spheroidal pore shape; Functional applications; Thermal conductivity; Electrical conductivity; Porosity; Microstructure-final (en)
http://linked.open.../riv/klicoveSlovo	Electrical conductivity Porosity Thermal conductivity Microstructure-final Functional applications Spheroidal pore shape
http://linked.open...odStatuVydavatele	BE - Belgické království
http://linked.open...ontrolniKodProRIV	[BB45264809A6]
http://linked.open...i/riv/nazevZdroje	Journal of the European Ceramic Society
http://linked.open...in/vavai/riv/obor	JH
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Porous Ceramics with Tailored Elasticity and Thermal Conductivity
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	34
http://linked.open...iv/tvurceVysledku	Gregorová, Eva Pabst, Willi
issn	0955-2219
number of pages	10 (xsd:int)
http://localhost/t...ganizacniJednotka	22310

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