INFLUENCE OF THE DOPANTS AND OF THE MICROSTRUCTURE ON THE IONIC-CONDUCTIVITY OF ZIRCONIA

被引：1

作者：

FILAL, M ^{[1
]}

PETOT, C ^{[1
]}

PETOTERVAS, G ^{[1
]}

AMAMRA, MC ^{[1
]}

CARPENTIER, JL ^{[1
]}

DELLIS, JL ^{[1
]}

机构：

[1] UNIV AMIENS,AMIENS,FRANCE

来源：

JOURNAL DE PHYSIQUE IV | 1993年 / 3卷 / C7期

关键词：

D O I：

10.1051/jp4:19937228

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electrical conductivity of monocrystalline and polycrystalline samples of yttria-doped zirconia was measured by impedance spectroscopy, in the temperature range 300-900°C and for oxygen partial pressures included between 10-24 and one atmosphere. Results show that the bulk conductivity is independent of the PO2 and varies with the amount of yttrium. The higher conductivities are obtained with zirconia samples doped with 9.5 models %. According to recent literature oxygen diffusion data, the results have been analyzed taking into account the participation of different kinds of defects to the transport processes. The grain boundary conductivity and the 'composite effect' have been analyzed taking into account microstructural characterizations. A maximum of ionic conductivity is observed with zirconia doped with 9.9 moles % yttrium when the amount of alumina is equal to approximately 2 moles%.

引用

页码：1463 / 1466

页数：4

共 13 条

[1] STUDY OF THE DC AND AC ELECTRICAL-PROPERTIES OF AN YTTRIA-STABILIZED ZIRCONIA SINGLE-CRYSTAL [(ZRO2)0.88-(Y2O3)0.12] [J].