Superionic phase transition in AgI embedded in molecular sieves

S. V. Baryshnikov; Cheng Tien; E. V. Charnaya; Min-Kai Lee; D. Michel; W. Böhlmann; N. P. Andriyanova

doi:10.1088/0953-8984/20/02/025214

Superionic phase transition in AgI embedded in molecular sieves

S. V. Baryshnikov, Cheng Tien, E. V. Charnaya, Min-Kai Lee, D. Michel, W. Böhlmann, N. P. Andriyanova

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摘要

Superionic AgI particles embedded in MCM-41 and SBA-15 molecular sieves with different pore sizes were studied using NMR and dielectric methods. The measurements confirmed that the structure of the confined particles did not change noticeably compared to that in bulk AgI. A regular increase in the temperature of the superionic phase transition with decreasing pore size was observed and treated on the basis of the Landau theory of thermodynamic size effects. The maximum increase found upon warming and cooling was about 10 and 8 K, respectively. The ionic conductivity in β-AgI under confinement was shown to be due to silver mobility on the particle surface.

原文	English
文章編號	025214
期刊	Journal of Physics Condensed Matter
卷	20
發行號	2
DOIs	https://doi.org/10.1088/0953-8984/20/02/025214
出版狀態	Published - 2008 1月 16

All Science Journal Classification (ASJC) codes

一般材料科學
凝聚態物理學

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10.1088/0953-8984/20/02/025214

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abstract = "Superionic AgI particles embedded in MCM-41 and SBA-15 molecular sieves with different pore sizes were studied using NMR and dielectric methods. The measurements confirmed that the structure of the confined particles did not change noticeably compared to that in bulk AgI. A regular increase in the temperature of the superionic phase transition with decreasing pore size was observed and treated on the basis of the Landau theory of thermodynamic size effects. The maximum increase found upon warming and cooling was about 10 and 8 K, respectively. The ionic conductivity in β-AgI under confinement was shown to be due to silver mobility on the particle surface.",

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AU - Baryshnikov, S. V.

AU - Tien, Cheng

AU - Charnaya, E. V.

AU - Lee, Min-Kai

AU - Michel, D.

AU - Böhlmann, W.

AU - Andriyanova, N. P.

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N2 - Superionic AgI particles embedded in MCM-41 and SBA-15 molecular sieves with different pore sizes were studied using NMR and dielectric methods. The measurements confirmed that the structure of the confined particles did not change noticeably compared to that in bulk AgI. A regular increase in the temperature of the superionic phase transition with decreasing pore size was observed and treated on the basis of the Landau theory of thermodynamic size effects. The maximum increase found upon warming and cooling was about 10 and 8 K, respectively. The ionic conductivity in β-AgI under confinement was shown to be due to silver mobility on the particle surface.

AB - Superionic AgI particles embedded in MCM-41 and SBA-15 molecular sieves with different pore sizes were studied using NMR and dielectric methods. The measurements confirmed that the structure of the confined particles did not change noticeably compared to that in bulk AgI. A regular increase in the temperature of the superionic phase transition with decreasing pore size was observed and treated on the basis of the Landau theory of thermodynamic size effects. The maximum increase found upon warming and cooling was about 10 and 8 K, respectively. The ionic conductivity in β-AgI under confinement was shown to be due to silver mobility on the particle surface.

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Superionic phase transition in AgI embedded in molecular sieves

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