Conductivity of porous materials with spheroidal pores

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F14%3A43898224" target="_blank" >RIV/60461373:22310/14:43898224 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Conductivity of porous materials with spheroidal pores

Popis výsledku v původním jazyce

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 ("intrinsic conductivities") 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 sphe

Název v anglickém jazyce

Conductivity of porous materials with spheroidal pores

Popis výsledku anglicky

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 ("intrinsic conductivities") 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 sphe

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

<a href="/cs/project/GAP108%2F12%2F1170" target="_blank" >GAP108/12/1170: Porézní keramika s řízenou elasticitou a tepelnou vodivostí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of the European Ceramic Society

ISSN

0955-2219

e-ISSN

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Svazek periodika

34

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

BE - Belgické království

Počet stran výsledku

10

Strana od-do

2757-2766

Kód UT WoS článku

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EID výsledku v databázi Scopus

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