Firing of Illite-based Ceramics Followed by Dynamical Thermomechanical Analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00342928" target="_blank" >RIV/68407700:21110/20:00342928 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1063/5.0025981" target="_blank" >https://doi.org/10.1063/5.0025981</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0025981" target="_blank" >10.1063/5.0025981</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Firing of Illite-based Ceramics Followed by Dynamical Thermomechanical Analysis

Popis výsledku v původním jazyce

Illitic clay (Tokai region, Hungary) is investigated using Young’s modulus, which is determined by the dynamical thermomechanical analysis in the temperature cycle 20 °C -> 1100 °C -> 20 °C. Supplementary analyses are thermodilatometry and thermogravimetry. The development of bulk density with temperature is also evaluated. The bulk density decreases due to mass loss and weak thermal expansion. Despite these findings, Young’s modulus doubled its values. It can be explained by the tighter position of clay crystals after a release of the physically bound water. In the temperature interval of 300 °C -> 700 °C Young’s modulus decreases linearly because no structural and microstructural changes took place. Dehydroxylation illite is presented at the temperature above 450 °C, but only a small decrease of Young’s modulus at 700 °C could be ascribed to dehydroxylation of illite. Both, the solid-state sintering and following the liquid-state sintering increases values of Young’s modulus at 700 °C -> 1100 °C -> 750 °C. Microcracking begins after reaching the glass transition temperature as a result of different thermal expansions of quartz and other minerals. The sharp V-shape minimum of Young’s modulus and its short recovery is observed. They are caused by the reversal of radial and tangential stresses acting on the quartz grains between 600 °C -> 500 °C. The microcracking continued and Young’s modulus decreases its values at 500 °C -> 20 °C.

Název v anglickém jazyce

Firing of Illite-based Ceramics Followed by Dynamical Thermomechanical Analysis

Popis výsledku anglicky

Illitic clay (Tokai region, Hungary) is investigated using Young’s modulus, which is determined by the dynamical thermomechanical analysis in the temperature cycle 20 °C -> 1100 °C -> 20 °C. Supplementary analyses are thermodilatometry and thermogravimetry. The development of bulk density with temperature is also evaluated. The bulk density decreases due to mass loss and weak thermal expansion. Despite these findings, Young’s modulus doubled its values. It can be explained by the tighter position of clay crystals after a release of the physically bound water. In the temperature interval of 300 °C -> 700 °C Young’s modulus decreases linearly because no structural and microstructural changes took place. Dehydroxylation illite is presented at the temperature above 450 °C, but only a small decrease of Young’s modulus at 700 °C could be ascribed to dehydroxylation of illite. Both, the solid-state sintering and following the liquid-state sintering increases values of Young’s modulus at 700 °C -> 1100 °C -> 750 °C. Microcracking begins after reaching the glass transition temperature as a result of different thermal expansions of quartz and other minerals. The sharp V-shape minimum of Young’s modulus and its short recovery is observed. They are caused by the reversal of radial and tangential stresses acting on the quartz grains between 600 °C -> 500 °C. The microcracking continued and Young’s modulus decreases its values at 500 °C -> 20 °C.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20504 - Ceramics

Projekt

<a href="/cs/project/GA20-01536S" target="_blank" >GA20-01536S: Řízená modifikace mineralogického složení keramického střepu za účelem zlepšení jeho užitných vlastností</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

AIP Conference Proceedings 2275

ISBN

978-0-7354-4005-0

ISSN

—

e-ISSN

1551-7616

Počet stran výsledku

5

Strana od-do

—

Název nakladatele

AIP Publishing, APL, the American Institute of Physics

Místo vydání

Melville, NY

Místo konání akce

Eger

Datum konání akce

2. 9. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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