EFFECT OF FREQUENCY ON THE ELECTRICAL CHARACTERISTICS OF TIN-ANTIMONY-OXIDE MIXTURES

被引：18

作者：

OVENSTON, A ^{[1
]}

SPRINCEANA, D ^{[1
]}

WALLS, JR ^{[1
]}

CALDARARU, M ^{[1
]}

机构：

[1] ACAD ROMANA,INST CHIM FIZ,R-77208 BUCHAREST,ROMANIA

来源：

JOURNAL OF MATERIALS SCIENCE | 1994年 / 29卷 / 19期

关键词：

D O I：

10.1007/BF01151083

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of frequency (100 Hz to 1 MHz) both on complex permittivity and on complex impedance data was used to study the conduction processes in Sn-Sb-O systems between 300 and 873 K. The conductance of tin oxide was increased by the addition of antimony oxide at all frequencies and a peak in conductivity was observed at 5 wt % Sb2O3. The effect of frequency on conductance was in agreement with the universal behaviour of solid dielectrics, whilst the atmosphere-dependent capacitance indicated surface dipole phenomena. The catalytic activity and selectivity patterns for the oxidation of propylene above 650 K may be correlated with the observed electrical behaviour, which is related to the mobility of lattice oxygen in the outer layers of the surface.

引用

页码：4946 / 4952

页数：7

共 33 条

[1] VALENCE STATES AND SOLUBILITY LIMITS IN TERNARY IRON-TIN-ANTIMONY MIXED-OXIDE CATALYSTS [J].