Influence of texture on DC conductivity and dimensional changes of kaolin and illitic clay

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10406655" target="_blank" >RIV/00216208:11320/19:10406655 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=VLYNECAsis" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=VLYNECAsis</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ceramint.2018.10.162" target="_blank" >10.1016/j.ceramint.2018.10.162</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of texture on DC conductivity and dimensional changes of kaolin and illitic clay

Popis výsledku v původním jazyce

The influence of the technological texture on the DC conductivity of an illitic clay and kaolin was studied. Textured samples were prepared by layering a wet plastic mass made from distilled water and clay. Anisotropy of the samples was assessed by studying the DC conductivity and dimensional changes as functions of temperature in parallel and perpendicular directions to the basal planes of illite and kaolinite crystals. It was found that the shrinkage of the samples after firing is more significant in the direction perpendicular to the basal planes. The DC conductivity both in the illitic clay and kaolin is higher parallel to the basal planes of illite or kaolinite crystals than perpendicular to them. In both materials, the dominant charge carriers are K+ and Na+ ions, complemented by H+ and OH- ions during the removal of the physically bound water and dehydroxylation. The influence of the texture remains observable in the kaolin samples even after a high-temperature treatment (1200 degrees C), contrary to the illitic clay where this influence is suppressed by the high amount of the glassy phase (similar to 80 mass %) after the thermal treatment at temperatures above 1000 degrees C. Compared to the illitic clay, the influence of the technological texture on the DC conductivity of kaolin is more significant.

Název v anglickém jazyce

Influence of texture on DC conductivity and dimensional changes of kaolin and illitic clay

Popis výsledku anglicky

The influence of the technological texture on the DC conductivity of an illitic clay and kaolin was studied. Textured samples were prepared by layering a wet plastic mass made from distilled water and clay. Anisotropy of the samples was assessed by studying the DC conductivity and dimensional changes as functions of temperature in parallel and perpendicular directions to the basal planes of illite and kaolinite crystals. It was found that the shrinkage of the samples after firing is more significant in the direction perpendicular to the basal planes. The DC conductivity both in the illitic clay and kaolin is higher parallel to the basal planes of illite or kaolinite crystals than perpendicular to them. In both materials, the dominant charge carriers are K+ and Na+ ions, complemented by H+ and OH- ions during the removal of the physically bound water and dehydroxylation. The influence of the texture remains observable in the kaolin samples even after a high-temperature treatment (1200 degrees C), contrary to the illitic clay where this influence is suppressed by the high amount of the glassy phase (similar to 80 mass %) after the thermal treatment at temperatures above 1000 degrees C. Compared to the illitic clay, the influence of the technological texture on the DC conductivity of kaolin is more significant.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/GA17-16772S" target="_blank" >GA17-16772S: Optimalizace mechanických, termofyzikálních a elektrických vlastností nových keramik na bázi illitu</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Ceramics International

ISSN

0272-8842

e-ISSN

—

Svazek periodika

45

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

2425-2431

Kód UT WoS článku

000453492800118

EID výsledku v databázi Scopus

2-s2.0-85055522293