Thermal properties and crystallization of MgO-FeOx-P2O5 glassess

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39912724" target="_blank" >RIV/00216275:25310/18:39912724 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s10973-018-6981-9" target="_blank" >http://dx.doi.org/10.1007/s10973-018-6981-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10973-018-6981-9" target="_blank" >10.1007/s10973-018-6981-9</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermal properties and crystallization of MgO-FeOx-P2O5 glassess

Popis výsledku v původním jazyce

Differential scanning calorimetry (DSC), dilatometry (TD) and X-ray diffraction have been used to study thermal behaviour and stability of glasses prepared simultaneously in Al2O3 or Pt crucibles in compositional series (40-x)MgO-xFe2O3-60P2O5 within the concentration range of x=0-40 mol% Fe2O3. Mössbauer spectra showed that all glasses with Fe2O3 contained both Fe(II) and Fe(III) ions. The contamination glasses from alumina crucibles ranged from 0.3 to 0.9 mol% Al2O3. The replacement of MgO by Fe2O3 resulted in a gradual decrease of glass transition temperature and dilatometric softening temperature, whereas thermal expansion coefficient did not changes significantly. The DSC curves showed that all glasses crystallize on heating in the broad temperature range 560-900oC. Crystallization temperature decreases with increasing Fe2O3 content. The highest tendency towards crystallization was found for the glass containing 40 mol% Fe2O3. X-ray diffraction measurements showed that the major compounds formed by glass crystallization were Mg(PO3)2, Fe(PO3)3, Fe3(P2O7)2 and FePO4. All thermoanalytical studies showed differences in thermal behaviour of glasses prepared in Al2O3 or Pt crucibles.

Název v anglickém jazyce

Thermal properties and crystallization of MgO-FeOx-P2O5 glassess

Popis výsledku anglicky

Differential scanning calorimetry (DSC), dilatometry (TD) and X-ray diffraction have been used to study thermal behaviour and stability of glasses prepared simultaneously in Al2O3 or Pt crucibles in compositional series (40-x)MgO-xFe2O3-60P2O5 within the concentration range of x=0-40 mol% Fe2O3. Mössbauer spectra showed that all glasses with Fe2O3 contained both Fe(II) and Fe(III) ions. The contamination glasses from alumina crucibles ranged from 0.3 to 0.9 mol% Al2O3. The replacement of MgO by Fe2O3 resulted in a gradual decrease of glass transition temperature and dilatometric softening temperature, whereas thermal expansion coefficient did not changes significantly. The DSC curves showed that all glasses crystallize on heating in the broad temperature range 560-900oC. Crystallization temperature decreases with increasing Fe2O3 content. The highest tendency towards crystallization was found for the glass containing 40 mol% Fe2O3. X-ray diffraction measurements showed that the major compounds formed by glass crystallization were Mg(PO3)2, Fe(PO3)3, Fe3(P2O7)2 and FePO4. All thermoanalytical studies showed differences in thermal behaviour of glasses prepared in Al2O3 or Pt crucibles.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

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

1388-6150

e-ISSN

—

Svazek periodika

132

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

843-850

Kód UT WoS článku

000428957300004

EID výsledku v databázi Scopus

2-s2.0-85040773406