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Devitrification kinetics of Sb2O3-PbI2 glasses
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SYSNO ASEP 0340423 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Devitrification kinetics of Sb2O3-PbI2 glasses Tvůrce(i) Legouera, M. (DZ)
Rahal, F. (DZ)
Kostka, Petr (UACH-T)
Poulain, M. (FR)Zdroj.dok. Annales de Chimie-Science Des Materiaux. - : Elsevier - ISSN 0151-9107
Roč. 34, č. 4 (2009), s. 249-266Poč.str. 18 s. Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova crystallization kinetics ; nucleation Vědní obor RIV CA - Anorganická chemie CEZ AV0Z40320502 - UACH-T (2005-2011) UT WOS 000272642200005 DOI 10.3166/acsm.34.249-266 Anotace Devitrification kinetics of Sb2O3-PbI2 glasses. Devitrification of oxyhalide glasses in the (1-x)Sb2O3-xPbI(2) system has been investigated by Differential Scanning Calorimetry (DSC). A single exotherm is observed in the DSC scan beyond the glass transition temperature Tg, which ensures the applicability of the Mehl-Johnson-Avrami-Kolmogorov relations. Non-isothermal measurements give access to the values of Avrami exponent n and activation energy E. E lies between 300 to 600kJ/mol and increases as lead iodide content increases. Exponent n also increases with PbI2 concentration: it ranges from 2.8 to 3.8. These results are consistent with the stability factors based on characteristic temperatures and confirm that the 90% Sb2O3 glass is the most stable. Crystal growth mechanism is discussed in relation to SEM observations. Pracoviště Ústav anorganické chemie Kontakt Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Rok sběru 2010
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