Effect of Na+ and NH4+ cations on microstructure changes of natural vermiculite during heat treatment.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F02%3A50023054" target="_blank" >RIV/61388980:_____/02:50023054 - 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

Effect of Na+ and NH4+ cations on microstructure changes of natural vermiculite during heat treatment.

Original language description

Emanation thermal analysis (ETA), DTA, SEM, and XRD were applied for the characterization of the effect of Na+ and NH4+ ions used for saturation of natural Mg-vermiculite on the microstructure during heating. The microstructure changes were characterizedby ETA under in situ conditions of samples heating in air in the temperature range 20-1300degreesC. It was found that Na+ and NH4+ ions have a significant effect on the microstructure changes during heat treatment of the natural Mg-vermiculite sample saturated with these ions. For Mg-vermiculite and Na+ saturated vermiculite the temperatures of the onset of the collapse of interlaminar space were determined by ETA. Differences in thermal stability of the microstructure of dehydrated vermiculite sampleswere observed by ETA: the microstructure of dehydrated Mg-vermiculite, and Na-vermiculite was found stable until 650 and 350degreesC, respectively. For dehydrated NH4-vermiculite the annealing of the microstructure started at 730degreesC

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

CA - Inorganic chemistry

OECD FORD branch

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Project

<a href="/en/project/LN00A028" target="_blank" >LN00A028: New inorganic compounds and advanced materials</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2002

Confidentiality

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

Name of the periodical

Journal of Thermal Analysis and Calorimetry

ISSN

1418-2874

e-ISSN

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Volume of the periodical

67

Issue of the periodical within the volume

1

Country of publishing house

HU - HUNGARY

Number of pages

10

Pages from-to

73-82

UT code for WoS article

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EID of the result in the Scopus database

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