4.7 Article

Effect of annealing close to Tg on the short-range order of lithium disilicate glass

期刊

JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 560, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.jnoncrysol.2021.120729

关键词

Pre-nucleation stage; Chemical short-range order; Lithium disilicate; X-ray diffraction; RDF; lithium metasilicate; Pairs distribution function

资金

  1. Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (Capes)
  2. Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [406916/2016-0]
  3. Fundacao de Amparo a Pesquisa do Estado do Rio Grande do Sul (FAPERGS) [19/2551-0001978-5]
  4. Brazilian Synchrotron Light Laboratory (LNLS) [XRD1 - 17775, XDS-20170862]

向作者/读者索取更多资源

The study found that annealing of lithium disilicate glass affects its short and medium-range order, even at temperatures well below the glass transition temperature T-g.
Annealing of glasses at temperatures close to T-g is a usual procedure to reduce internal stresses induced by the conventional melting/quenching process. In this work, the effect of the annealing temperature and time on shortrange order of lithium disilicate glass was investigated. The total structure factor and radial distribution function of annealed samples at distinct temperatures and times were derived from synchrotron XRD measurements. The results suggest that short and medium range-orders were affected by the annealing conditions, even for temperatures well below the glass transition temperature, T-g. After annealing at temperatures close to T-g, local arrangements were identified with those corresponding to crystalline phases of lithium disilicate and lithium metasilicate. For temperatures below T-g, the diffusion of lithium atoms was already taking place, while the rearrangements of the SiO4 tetrahedra from the network former started to happen for temperatures close to or higher than T-g.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据