Pressure dependent conductivities and activation volumes in LixNa(1-x)PO3 glasses:: evidence for a new matrix-mediated coupling mechanism in mixed-cation glasses?

被引：39

作者：

Bandaranayake, PWSK

Imrie, CT

Ingram, MD ^{[1
]}

机构：

[1] Univ Aberdeen, Dept Chem, Aberdeen AB24 3UE, Scotland

[2] Univ Peradeniya, Dept Phys, Peradeniya, Sri Lanka

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2002年 / 4卷 / 14期

关键词：

D O I：

10.1039/b201215d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ionic conductivities in a range of LixNa(1-x)PO3 glasses are reported as a function of both temperature and pressure. This series of mixed-cation glasses characteristically exhibits minima in glass transition temperatures and in ionic conductivities, and a maximum in the activation energy for ionic conductivity. There is also a maximum in the corresponding activation volume (DeltaV*), where DeltaV*(max) congruent to DeltaV*(Li glass) + DeltaV*(Na glass). It is suggested that this approximate equality is evidence for direct coupling between Li+ and Na+ ion motions, which is mediated through the glass matrix. This coupling process directly influences the mechanism of ion transport in mixed-cation glasses and could be responsible for many features of the mixed-alkali effect.

引用

页码：3209 / 3213

页数：5

共 30 条

[1] THE DYNAMIC STRUCTURE MODEL FOR ION-TRANSPORT IN GLASSES
BUNDE, A
INGRAM, MD
MAASS, P
[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 1994, 172 (pt 2) : 1222 - 1236
[2] A STUDY OF THE MIXED ALKALI EFFECT BY FREQUENCY-DEPENDENT CONDUCTIVITY IN LI2O-NA2O-P2O5 GLASSES
CHEN, R
YANG, R
DURAND, B
PRADEL, A
RIBES, M
[J]. SOLID STATE IONICS, 1992, 53 (pt 2) : 1194 - 1199
[3] Ion dynamics in mixed alkali glasses
Cramer, C
Brückner, S
Gao, Y
Funke, K
[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2002, 4 (14) : 3214 - 3218
[4] MIXED ALKALI GLASSES - THEIR PROPERTIES AND USES
DAY, DE
[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 1976, 21 (03) : 343 - 372
[5] The effect of hydrostatic pressure and temperature on the frequency dependencies of the a.c. conductivity of ionic (AgPO3) and (Ag2S)0.3(AgPO3)0.7 glasses
Fanggao, C
Saunders, GA
Wei, Z
Almond, DP
Cutroni, M
Mandanici, A
[J]. SOLID STATE IONICS, 1998, 109 (1-2) : 89 - 100
[6] Dynamics of mobile ions in crystals, glasses and melts
Funke, K
Roling, B
Lange, M
[J]. SOLID STATE IONICS, 1998, 105 (1-4) : 195 - 208
[7] Relaxation processes and the mixed alkali effect in alkali metasilicate glasses
Habasaki, J
Okada, I
Hiwatari, Y
[J]. STRUCTURE AND DYNAMICS OF GLASSES AND GLASS FORMERS, 1997, 455 : 91 - 102
[8] ION-CHANNEL MATCH IN MIXED ALKALI GLASSES
HARA, M
[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 1991, 131 : 1076 - 1079
[9] THE EFFECTS OF PRESSURE AND DENSIFICATION ON IONIC CONDUCTIVITIES IN SILVER IODOMOLYBDATE GLASSES
HUTCHINSON, JM
INGRAM, MD
ROBERTSON, AHJ
[J]. PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1992, 66 (04): : 449 - 461
[10] INGRAM MD, 1987, PHYS CHEM GLASSES, V28, P215

← 1 2 3 →