HIGH-TEMPERATURE GRAVIMETRIC STUDY ON NONSTOICHIOMETRY AND OXYGEN-ADSORPTION OF SNO2

被引：44

作者：

MIZUSAKI, J

KOINUMA, H

SHIMOYAMA, JI

KAWASAKI, M

FUEKI, K

机构：

[1] TOKYO INST TECHNOL,ENGN MAT RES INST,MIDORI KU,YOKOHAMA,KANAGAWA 227,JAPAN

[2] UNIV TOKYO,FAC ENGN,DEPT IND CHEM,BUNKYO KU,TOKYO 113,JAPAN

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1990年 / 88卷 / 02期

关键词：

D O I：

10.1016/0022-4596(90)90240-X

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Gravimetric studies on porous SnO2 between 200 and 1150°C and for oxygen partial pressures, P(O2), between 1 and 10-6 atm showed that the mass change of below 900°C is essentially due to oxygen adsorption on the SnO2 surface. The oxygen adsorption was interpreted in terms of three Langmuir-type equations with different heats of adsorption. Mass changes due to nonstoichiometry were observed above 1000°C. The degree of nonstoichiometry of SnO2 was found to be very small: For example, d in SnO2-d at 0.1 atm of P(O2) was 7 = 10-5 at 1000°C and 2 × 10-4 at 1150°C. The nonstoichiometry arises from oxygen deficiencies present as oxygen vacancies, VO··; d in SnO2-d above 1000°C is proportional to P(O2)- 1 6. © 1990.

引用

页码：443 / 450

页数：8

共 9 条

[1] DEFECT CHEMISTRY OF TIN(IV)-OXIDE IN BULK AND BOUNDARY-LAYERS [J].