Mixed-alkali effect in sodium-potassium glasses irradiated with electrons

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F10%3A00023006" target="_blank" >RIV/60461373:22310/10:00023006 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/10:00379203

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Mixed-alkali effect in sodium-potassium glasses irradiated with electrons

Popis výsledku v původním jazyce

Mixed-alkali effect (MAE) was studied by irradiating (15 - x)Na2O center dot xK(2)O center dot 85SiO(2) glasses with electrons and observing the following glass response expressed through volume changes measured with AFM. Glasses were irradiated by 50 keV electrons with doses up to 191 kC/m(2). Low irradiation doses showed the volume compaction, extent of which was linearly dependent on potassium content. It was shown the compaction can be explained as the superposition of the relaxation around alkali ions and the silica network relaxation. At high doses most of glasses show volume expansions. High irradiation doses cause alkali depletion from the surface glass layer and reveal a typical MAE response in volume changes. it is explained in terms of negative correlation among the element specific migration paths. An alternative view of MAE is suggested: the coupling among moving ions is replaced by the correlation among migration paths that are predetermined in the structure of mixed glas

Název v anglickém jazyce

Mixed-alkali effect in sodium-potassium glasses irradiated with electrons

Popis výsledku anglicky

Mixed-alkali effect (MAE) was studied by irradiating (15 - x)Na2O center dot xK(2)O center dot 85SiO(2) glasses with electrons and observing the following glass response expressed through volume changes measured with AFM. Glasses were irradiated by 50 keV electrons with doses up to 191 kC/m(2). Low irradiation doses showed the volume compaction, extent of which was linearly dependent on potassium content. It was shown the compaction can be explained as the superposition of the relaxation around alkali ions and the silica network relaxation. At high doses most of glasses show volume expansions. High irradiation doses cause alkali depletion from the surface glass layer and reveal a typical MAE response in volume changes. it is explained in terms of negative correlation among the element specific migration paths. An alternative view of MAE is suggested: the coupling among moving ions is replaced by the correlation among migration paths that are predetermined in the structure of mixed glas

Druh

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

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

<a href="/cs/project/GA104%2F09%2F1269" target="_blank" >GA104/09/1269: Změny ve struktuře a vlastnostech křemičitých skel ozářených vysokoenergetickými částicemi</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

Journal of Non-crystalline Solids

ISSN

0022-3093

e-ISSN

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Svazek periodika

356

Číslo periodika v rámci svazku

9-10

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

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Kód UT WoS článku

000275769800004

EID výsledku v databázi Scopus

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