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

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/LN00A028" target="_blank" >LN00A028: Nové a perspektivní anorganické sloučeniny a materiály</a><br>

Návaznosti

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

Rok uplatnění

2002

Kód důvěrnosti údajů

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

Název periodika

Journal of Thermal Analysis and Calorimetry

ISSN

1418-2874

e-ISSN

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Svazek periodika

67

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

HU - Maďarsko

Počet stran výsledku

10

Strana od-do

73-82

Kód UT WoS článku

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EID výsledku v databázi Scopus

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