THE THERMOSTABILIZING EFFECT OF LANTHANUM ON GAMMA-AL2O3 STUDIED BY LOW-ENERGY ION-SCATTERING

被引：13

作者：

VANLEERDAM, GC

BRONGERSMA, HH

TIJBURG, IIM

GEUS, JW

机构：

[1] EINDHOVEN UNIV TECHNOL,SCHUIT INST CATALYSIS,5600 MB EINDHOVEN,NETHERLANDS

[2] UNIV UTRECHT,DEPT INORGAN CHEM,3584 CA UTRECHT,NETHERLANDS

来源：

APPLIED SURFACE SCIENCE | 1992年 / 55卷 / 01期

关键词：

D O I：

10.1016/0169-4332(92)90376-9

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：

Low-energy ion scattering has been used to study the surface of lanthanum thermostabilized gamma-Al2O3 during several stages of the sintering process. Deposition of lanthanum onto the support by specific adsorption of a [La(EDTA)]- complex turns out to be homogeneous. After calcination at 550-degrees-C La2O3 particles have been formed on the surface, while LEIS results after sintering at 1050-degrees-C indicate the formation of a lanthanum-aluminate surface layer. The presence of lanthanum prevents transformation of gamma-Al2O3 to alpha Al2O3 at 1050-degrees-C.

引用

页码：11 / 18

页数：8