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

Result code in 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>
Alternative codes found
RIV/00216208:11320/19:10407264
Result on the web
<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>

Result language
angličtina
Original language name
Electrical conductivity and thermal analyses studies of phase evolution in the illite – CaCO3 system
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering

Project
<a href="/en/project/GA17-16772S" target="_blank" >GA17-16772S: Optimization of mechanical, thermophysical and electrical properties of novel illite-based ceramic materials</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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