MOLECULAR-DYNAMICS EVIDENCE OF CATION MEDIUM-RANGE ORDER IN CASIO3 GLASS

被引：6

作者：

ABRAMO, MC

CACCAMO, C

PIZZIMENTI, G

机构：

[1] Istituto di Fisica Teorica, Università di Messina, C.P. 50, 98166 S. Agata di Messina, Messina

来源：

PHYSICS LETTERS A | 1992年 / 166卷 / 01期

关键词：

D O I：

10.1016/0375-9601(92)90877-O

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Molecular dynamics calculations are reported showing medium-range order (m.r.o.) of Ca ions in CaSiO3 glass, in agreement with recent measurements by Gaskell et al. of the Ca-Ca partial structure factor (p.s.f.); evidence in favor of the presence in the glass of "crystalline" CaSiO3 domains is also discussed. A close relationship emerges between Ca m.r.o. and charge correlation of Ca with O ions. The total neutron s.f. is also calculated and it appears that the first sharp diffraction peak, typical of vitreous SiO2, is replaced by two less pronounced features in CaSiO3 glass.

引用

页码：65 / 69

页数：5

共 28 条

[1] AG2O-B2O3 GLASSY SYSTEMS - NETWORK COHERENCE BEHAVIOR AS SEEN FROM MOLECULAR-DYNAMICS CALCULATIONS [J].