Structure, Structural Relaxation and Ion Transport in Sodium Disilicate Melts

Details Structure, Structural Relaxation and Ion Transport in Sodium Disilicate Melts Structure, Structural Relaxation and Ion Transport in Sodium Disilicate Melts

2002-06-11

arxiv.org/abs/cond-mat/0206168v1

Physics

Condensed Matter

Materials Science

Scientific paper

We have investigated Na2SiO5 melts with inelastic neutron scattering at temperatures up to 1600K. The Si-O network relaxes on a time scale of ns, whereas the Na ion relaxation dynamics are found on a time scale of 10ps. The elastic structure factor exhibits at ~0.9A-1 an emerging prepeak which becomes more pronounced with increasing temperature. The prepeak is caused by the formation of sodium rich regions in the partially disrupted Si-O tetrahedral network.

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