Kinetic studies on leucite precursors
Result description
Kinetic studies were performed on two types of leucite precursors. These precursors were prepared using a hydrothermal method at 150 degrees C; the reaction time was 1.5 hours. In order to obtain precursors having different amounts of seed the molarity of KOH was changed. These intermediate products were subsequently calcinated from 5 minutes to 72 hours at temperatures of 850 degrees C, 900 degrees C, 950 degrees C, 1000 degrees C and 1050 degrees C. The crystallinities of the powders were calculated by X-ray diffraction analysis. The crystallization curves for the synthesis of leucite exhibited a typical sigmoidal characteristic. Using different kinetic equations it was found that the Avrami-Erofeev model is the most appropriate to describe the experimental data. Using the Avrami-Erofeev model n reaches an average value of 2.9 which is connected with the three-dimensional growth of nuclei.
Keywords
The result's identifiers
Result code in IS VaVaI
Alternative codes found
RIV/60461373:22310/09:00022478
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Kinetic studies on leucite precursors
Original language description
Kinetic studies were performed on two types of leucite precursors. These precursors were prepared using a hydrothermal method at 150 degrees C; the reaction time was 1.5 hours. In order to obtain precursors having different amounts of seed the molarity of KOH was changed. These intermediate products were subsequently calcinated from 5 minutes to 72 hours at temperatures of 850 degrees C, 900 degrees C, 950 degrees C, 1000 degrees C and 1050 degrees C. The crystallinities of the powders were calculated by X-ray diffraction analysis. The crystallization curves for the synthesis of leucite exhibited a typical sigmoidal characteristic. Using different kinetic equations it was found that the Avrami-Erofeev model is the most appropriate to describe the experimental data. Using the Avrami-Erofeev model n reaches an average value of 2.9 which is connected with the three-dimensional growth of nuclei.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JH - Ceramics, fire-proof materials and glass
OECD FORD branch
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Result continuities
Project
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Central European Journal of Chemistry
ISSN
1895-1066
e-ISSN
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Volume of the periodical
7
Issue of the periodical within the volume
2
Country of publishing house
PL - POLAND
Number of pages
6
Pages from-to
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UT code for WoS article
000265019100009
EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
JH - Ceramics, fire-proof materials and glass
Year of implementation
2009