DC Conductivity of Waste Calcite - Clay Ceramics in The Temperature Range 20 - 1050 °C

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F12%3A00198453" target="_blank" >RIV/68407700:21110/12:00198453 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
DC Conductivity of Waste Calcite - Clay Ceramics in The Temperature Range 20 - 1050 °C
Original language description
Electrical conductivity of green ceramic materials (60 wt.% of clay, 0 and 20 wt.% of calcite waste and 20 and 40 wt.% of the clay fired at 1000 °C) was measured in the temperature range of 20 - 1050 °C. DC electrical conductivity was measured with V-A method (sensitivity of 1x10-3 V and 1x10-14 A). Pt wires (? 0.5x150 mm) were used as the electrodes, which were inserted into the middle of the sample (20x10x10 mm). The samples passed through a release of the physically bound water, burning of the organic impurities, dehydroxylation of kaolinite and illite, decomposition of calcite and creation of anorthite and mullite. At low temperatures (20 - 200 °C), charge carriers are H+ and OH- ions bound to defects located on crystal surfaces and polar water molecules in the pores. After the releasing physically bound water, up to start of dehydroxylation at the temperature ~450 °C, DC conductivity is determined by a transport of Na+, Ca2+ and K+. During dehydroxylation, the charge carriers are
Czech name
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Czech description
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Project
<a href="/en/project/GBP105%2F12%2FG059" target="_blank" >GBP105/12/G059: Cumulative time dependent processes in building materials and structures</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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