Non-isothermal sinter-crystallization of jagged Li2O-Al2O3-SiO2 glass and simulation using a modified form of the Clusters model

Autor(es)

Soares, Viviane O. ^[1] ; Reis, Raphael C. V. M. ^[1] ; Zanotto, Edgar D. ^[1] ; Pascual, Maria J. ^[2] ; Duran, Alicia ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Mat Engn, Vitreous Mat Lab, BR-13565905 Sao Carlos, SP - Brazil

^[2] CSIC, Inst Ceram & Vidrio, E-28049 Madrid - Spain

• Tipo de documento: Artigo Científico
• Fonte: Journal of Non-Crystalline Solids; v. 358, n. 23, p. 3234-3242, DEC 1 2012.
• Citações Web of Science: 21

Resumo

We have tested a modified form of the Clusters model of sintering for the complex case of non-isothermal sintering with concurrent crystallization of a multicomponent lithium aluminum silicate (LAS) glass having a broad size distribution of jagged particles. We compared experimental and simulated densification data using a constant heating rate. Only one adjustable parameter was used: the particle shape factor (K-s). We discuss the results in light of some complicating factors, such as temperature gradients within the powder compacts and compositional shifts of the residual glass matrix due to crystallization, which lead to changes of viscosity. The modified Clusters model accurately predicted the temperature dependence of densification and the final (saturation) density of the glass particle compacts. (C) 2012 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 07/08179-9 - Processos cinéticos em vidros e vitrocerâmicas
• Beneficiário: Edgar Dutra Zanotto
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 10/18947-6 - Desenvolvimento de vitrocerâmicas com alta tenacidade à fratura
• Beneficiário: Viviane Oliveira Soares
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado