Slow dynamics in ion-conducting sodium silicate melts: Simulation and mode-coupling theory

Slow dynamics in ion-conducting sodium silicate melts: Simulation and mode-coupling theory
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离子传导硅酸钠熔体的慢动力学:模拟和模式耦合理论

DOI:
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发表时间:
2005
期刊:
影响因子:
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通讯作者:
J. Horbach
J. Horbach
中科院分区:
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文献类型:
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作者:
T. Voigtmann;J. Horbach

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玻璃化转变(MCT)的模式耦合理论内的计算被用来阐明在不同钠浓度的钠硅酸盐熔体(NSx)的结构动力学关系。只使用部分静态结构因素从分子动力学(MD)计算机模拟作为输入,MCT定性再现的钠和硅/氧组分之间的弛豫时间尺度的大分离特有的这种混合物。这表明,它是可能的,以解释快速钠离子动力学观察到的钠硅酸盐熔体使用MCT作为一个微观理论,并从平均平衡结构单独。
Calculations within the mode-coupling theory of the glass transition (MCT) are used to elucidate the structure-dynamics relation in sodium-silicate melts (NSx) of varying sodium concentration. Using only the partial static structure factors from molecular-dynamics (MD) computer simulation as input, MCT qualitatively reproduces the large separation in relaxation time scales between the sodium and the silicon/oxygen components peculiar to such mixtures. This shows that it is possible to explain the fast sodium-ion dynamics observed in sodium-silicate melts using MCT as a microscopic theory, and from the averaged equilibrium structure alone.