Hydrothermal rehydroxylation of kaolinite studied by thermal analysis

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F13%3A43895568" target="_blank" >RIV/60461373:22310/13:43895568 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22810/13:43895568

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Hydrothermal rehydroxylation of kaolinite studied by thermal analysis

Original language description

The effect of hydrothermal conditions on process of kaolinite rehydroxylation at 180 °C and 230 °C and for soaking times from 1 to 200 hour was studied by thermal analysis (DTA, DSC, TG). It is shown that the kaolinite dehydroxylation of rehydroxylated samples shifts to lower temperatures compared to the original kaolinite. Amounts of kaolinite in rehydroxylated samples were calculated from TG curves. The curve of the kaolinite mass gain plotted against the time of hydrothermal treatment indicates a twostage process with a different mass gain rate representing short and long-time measurements. Multiple dehydroxylation was studied by repeated calcinations (2 h at 600 °C) and hydrothermal treatments (10 h at 230 °C). It was proved that values of activation energy (Ea) of multiple dehydroxylations decreased with the increasing number of repeated treatments. Conclusions of the study were applied for the investigation of kaolinite origin in archaeological samples from Roztoky near Prague.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

AC - Archaeology, anthropology, ethnology

OECD FORD branch

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Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2013

Confidentiality

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

Name of the periodical

Ceramics-Silikáty

ISSN

0862-5468

e-ISSN

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Volume of the periodical

57

Issue of the periodical within the volume

4

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

6

Pages from-to

342-347

UT code for WoS article

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EID of the result in the Scopus database

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