Oxygen self-diffusion in a cordierite glass

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorSabioni, Antônio Claret Soares-
Autor(es): dc.creatorZanotto, Edgar Dutra-
Autor(es): dc.creatorMillot, F.-
Autor(es): dc.creatorTuller, H. L.-
Data de aceite: dc.date.accessioned2019-11-06T13:24:24Z-
Data de disponibilização: dc.date.available2019-11-06T13:24:24Z-
Data de envio: dc.date.issued2012-07-16-
Data de envio: dc.date.issued2012-07-16-
Data de envio: dc.date.issued1998-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/123456789/1130-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/554713-
Descrição: dc.descriptionOxygen self-di€usion measurements determined below and above the glass transition temperature in a cordierite glass are reported. The di€usion experiments were performed by the solid±gas isotope exchange method using 18O as a tracer in H2±H2 18O and Ar/18O2 atmospheres. The 18O di€usion pro®les were established by secondary ion mass spectrometry (SIMS) after appropriate di€usion annealing. The oxygen di€usion coe cients changed at the glass transition temperature as expected. The atmosphere a€ected the oxygen di€usivity in agreement with other studies. The di€usion data were useful for comparisons with di€usion controlled process in the same glass. There is a di€erence between the activation enthalpies for crystal growth, viscous ¯ow, and oxygen self-di€usion. Hence, bond-breaking and molecular reorientation required for crystallization and the atomic transport mechanism involved in viscous ¯ow are not correlated in any obvious way to oxygen di€usion in cordierite glass. Ó 1998 Elsevier Science B.V. All rights reserved.-
Idioma: dc.languageen-
Direitos: dc.rightsO Periódico Journal of Non-Crystalline Solids concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3345930562134.-
Título: dc.titleOxygen self-diffusion in a cordierite glass-
Aparece nas coleções:Repositório Institucional - UFOP

Não existem arquivos associados a este item.