H/D ISOTOPE EFFECT OF PROTON CONDUCTIVITY AND PROTON CONDUCTION MECHANISM IN OXIDES

被引：129

作者：

KREUER, KD

FUCHS, A

MAIER, J

机构：

[1] Max-Planck-Institut für Festkörperforschung, D-70569 Stuttgart

来源：

SOLID STATE IONICS | 1995年 / 77卷

关键词：

H/D ISOTOPE EFFECT; PROTON CONDUCTIVITY; OXIDE;

D O I：

10.1016/0167-2738(94)00265-T

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：

The elementary steps of proton conductivity in oxides, proton transfer and hydroxyl ion reorientation, are investigated and the anticipated H/D isotope effects of their rates are compared to those of proton (deuteron) conductivity. it is concluded that the rate of proton diffusivity in many oxides is limited by proton transfer between fixed oxygen sites. This is facilitated by the thermal fluctuation of the oxygen ion separation. In the case of a rigid array of oxygen ions an attempt frequency close to that of the OH (OD) oscillator and a high activation enthalpy is expected. The effect of softening the O-O vibration is to decrease the attempt frequency and activation barrier. Criteria for high diffusivities of protonic defects in oxides are formulated.

引用

页码：157 / 162

页数：6

共 15 条

[11] SCHEINER S, 1980, INT J QUANTUM CHEM, V7, P199
[12] BULK PROTONIC CONDUCTION IN YB-DOPED SRCEO3 AND BACEO3
SCHERBAN, T
LEE, WK
NOWICK, AS
[J]. SOLID STATE IONICS, 1988, 28 : 585 - 588
[13] PROTONS AND OTHER DEFECTS IN FE-DOPED KTAO(3)
SCHERBAN, T
NOWICK, AS
BOATNER, LA
ABRAHAM, MM
[J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1992, 55 (04): : 324 - 331
[14] GENERATION OF CHARGE-CARRIERS AND AN H/D ISOTOPE EFFECT IN PROTON-CONDUCTING DOPED BARIUM CERATE CERAMICS
SLADE, RCT
SINGH, N
[J]. JOURNAL OF MATERIALS CHEMISTRY, 1991, 1 (03) : 441 - 445
[15] STOTZ S, 1966, BERICH BUNSEN GESELL, V70, P781

← 1 2 →