Electrical conductivity and thermal analyses studies of phase evolution in the illite – CaCO3 system

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F19%3A00521668" target="_blank" >RIV/61389021:_____/19:00521668 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/19:10407264

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0169131719301917?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0169131719301917?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.clay.2019.105140" target="_blank" >10.1016/j.clay.2019.105140</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrical conductivity and thermal analyses studies of phase evolution in the illite – CaCO3 system

Popis výsledku v původním jazyce

Mixture of a purified illitic clay (>90 wt% of illite, Northeastern Hungary)and CaCO3, in laboratory grade, was studied with respect to the high-temperature crystallization of anorthite and leucite mineral phases. The prepared samples were subjected to thermal analyses – differential scanning calorimetry (DSC)and thermodilatometry (DIL), and microstructure was characterized by scanning electron microscopy. The phase composition of the samples after firing was determined by the help of XRD measurement. Among anorthite and leucite (which were present as dominant mineral phases), gehlenite was found in the fired samples. Crystallization temperatures were determined from DSC peaks (940 °C and 1070 °C for gehlenite/anorthite and leucite crystallization, respectively). The samples exhibited a steep contraction as the low-viscosity glassy phase appeared and the anorthite/gehlenite started to crystallize. The crystallization temperatures were confirmed by the temperature dependence of the loss tangent, which exhibited two maxima at 940 °C and 1070 °C. Thus, during crystallization, the contribution of the ions to the conductivity was hindered by their cooperative migration to occupy new sites.

Název v anglickém jazyce

Electrical conductivity and thermal analyses studies of phase evolution in the illite – CaCO3 system

Popis výsledku anglicky

Mixture of a purified illitic clay (>90 wt% of illite, Northeastern Hungary)and CaCO3, in laboratory grade, was studied with respect to the high-temperature crystallization of anorthite and leucite mineral phases. The prepared samples were subjected to thermal analyses – differential scanning calorimetry (DSC)and thermodilatometry (DIL), and microstructure was characterized by scanning electron microscopy. The phase composition of the samples after firing was determined by the help of XRD measurement. Among anorthite and leucite (which were present as dominant mineral phases), gehlenite was found in the fired samples. Crystallization temperatures were determined from DSC peaks (940 °C and 1070 °C for gehlenite/anorthite and leucite crystallization, respectively). The samples exhibited a steep contraction as the low-viscosity glassy phase appeared and the anorthite/gehlenite started to crystallize. The crystallization temperatures were confirmed by the temperature dependence of the loss tangent, which exhibited two maxima at 940 °C and 1070 °C. Thus, during crystallization, the contribution of the ions to the conductivity was hindered by their cooperative migration to occupy new sites.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Applied Clay Science

ISSN

0169-1317

e-ISSN

—

Svazek periodika

178

Číslo periodika v rámci svazku

September

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

105140

Kód UT WoS článku

000474497800009

EID výsledku v databázi Scopus

2-s2.0-85066260889