SURFACE CHARACTERIZATION OF BA-BETA-ALUMINA

被引：16

作者：

BUSCA, G ^{[1
]}

CRISTIANI, C ^{[1
]}

FORZATTI, P ^{[1
]}

GROPPI, G ^{[1
]}

机构：

[1] POLITECN MILAN,DIPARTIMENTO CHIM IND & INGN CHIM G NATTA,I-20123 MILAN,ITALY

来源：

CATALYSIS LETTERS | 1995年 / 31卷 / 01期

关键词：

BARIUM-BETA-ALUMINA; SURFACE CHARACTERIZATION; SURFACE CHARACTERIZATION OF BA-BETA-AL2O3; HYDROXY-GROUPS ON BA-BETA-AL2O3 SURFACE; PYRIDINE ADSORBED ON BA-BETA-AL2O3; ISOELECTRIC POINT OF BA-BETA-AL2O3; FT-IR SPECTRA OF BA-BETA-AL2O3;

D O I：

10.1007/BF00817034

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 surface properties of a Ba-beta-alumina sample (Ba : Al ratio 1 : 12) very stable to sintering (15 m(2)/g after calcination at 1670 K for 10 h) have been investigated by FT-IR spectroscopy of adsorbed probe molecules (water, pyridine and CO2) and by measuring the isoelectric point. The surface has a medium-strong basic character,justified by the preferential exposition of Ba-O-containing ''mirror planes'', parallel to 0001 planes, on the surface of plate-like particles. This behavior has been associated to the resistance to sintering, typical of this material, possibly originated by the difficulty of the very big Ba2+ ions to migrate into the spinel-type alumina blocks. This should imply the blocking of the crystal growth along the crystallographic c axis.

引用

页码：65 / 74

页数：10

共 23 条

[1]

Beevers CA, 1937, Z KRISTALLOGR, V97, P59

[2]

BELLOTTO M, UNPUB

[3]

BOHEM HP, 1983, CATALYSIS SCI TECHNO, V4, P39

[4] SOLID-STATE AND SURFACE SPECTROSCOPIC CHARACTERIZATION OF BATIO3 FINE POWDERS [J].

BUSCA, G ;

BUSCAGLIA, V ;

LEONI, M ;

NANNI, P .

CHEMISTRY OF MATERIALS, 1994, 6 (07) :955-961

[5] SURFACE SITES ON SPINEL-TYPE AND CORUNDUM-TYPE METAL-OXIDE POWDERS [J].

BUSCA, G ;

LORENZELLI, V ;

RAMIS, G ;

WILLEY, RJ .

LANGMUIR, 1993, 9 (06) :1492-1499

[6] VIBRATIONAL STUDY OF AND CONDUCTION MECHANISM IN BETA-ALUMINA .1. STOICHIOMETRIC BETA-ALUMINA [J].

COLOMBAN, P ;

LUCAZEAU, G .

JOURNAL OF CHEMICAL PHYSICS, 1980, 72 (02) :1213-1224

[7] THE EFFECT OF PH ON THE ADSORPTION OF PALLADIUM (II) COMPLEXES ON ALUMINA [J].

CONTESCU, C ;

VASS, MI .

APPLIED CATALYSIS, 1987, 33 (02) :259-271

[8]

EDGELL RG, 1989, J SOLID STATE CHEM, V79, P238

[9] PREPARATION AND CHARACTERIZATION OF HEXAALUMINATE-BASED MATERIALS FOR CATALYTIC COMBUSTION [J].

GROPPI, G ;

BELLOTTO, M ;

CRISTIANI, C ;

FORZATTI, P ;

VILLA, PL .

APPLIED CATALYSIS A-GENERAL, 1993, 104 (02) :101-108

[10]

GROPPI G, IN PRESS J SOLID STA

← 1 2 3 →