Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1482973 | Journal of Non-Crystalline Solids | 2008 | 7 Pages |
Abstract
Two series (A and B series) of oxynitride glasses were prepared by melting batches at 1580 °C for 3 h under local CO reducing atmosphere in a Si-Mo-heated resistance furnace. Nominal compositions of A and B series glasses in equivalent percent (eq.%) are (28âx)Y:xMg:48Si:24Al:83O:17N and (28âx)Y:xMg:56Si:16Al:83O:17N (x = 0, 7, 14, 21), respectively. The influences of Mg/Y and Al/Si ratios on the properties such as glass transition temperature (Tg), crystallization temperature (TC), knoop hardness (H), three-point bending strength (Ï) and chemical durability in 20%HF were investigated. At the same time, the relationship between these properties and the structures of the glasses were discussed. At constant ratio Si-Al-O-N, Tg decreases nonlinearly but glass leaching ratio increases linearly with increasing Mg/Y ratio. However, H and Ï increase first and then decrease as the Mg/Y ratio increases. When the Y/Mg/O/N ratio is constant, Tg decreases slightly but H and Ï increase slightly as the Al/Si ratio increases.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
X.Y. Li, A.X. Lu, Zh.H. Xiao, Ch.G. Zuo,