Thermophysical and Electrical Properties of a Natural Zeolite

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00373857" target="_blank" >RIV/68407700:21110/23:00373857 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1063/5.0146731" target="_blank" >https://doi.org/10.1063/5.0146731</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0146731" target="_blank" >10.1063/5.0146731</a>

Result language
angličtina
Original language name
Thermophysical and Electrical Properties of a Natural Zeolite
Original language description
Thermophysical processes occurring during the firing of zeolite (mined in Nizny Hrabovec, Slovakia) was studied in terms of conventional thermal analyses (differential thermal analysis, thermogravimetry, dilatometry), acoustic emission, scanning electron microscopy, and DC conductivity measurements. The evaporation of the water molecules trapped in the cavities and channels of zeolite led to a continuous gradual decrease in the samples mass up to ~850 °C. Clinoptilolite (the major mineral phase of zeolite) transformed into an amorphous phase above 800 °C. The sintering process started at 900 °C in the presence of liquid phase. DC conductivity revealed that the dominant charge carriers, mostly due to the dehydration of zeolite, are H+ and OH– ions up to the collapse of its structure. At higher temperatures alkali ions Na+, K+, and Ca2+ became the major charge carriers with conduction activation energy of 3.51 eV (from 830 °C to 930 °C). Above 960 °C the appearance of glassy phase supported the DC conductivity carried by the alkali ions and the activation energy reached 1.67 eV.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Central European Symposium on Thermophysics 2022 (CEST 2022)
ISBN
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ISSN
1551-7616
e-ISSN
1551-7616
Number of pages
6
Pages from-to
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Publisher name
AIP Conference Proceedings
Place of publication
New York
Event location
Olomouc
Event date
Aug 31, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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