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
BUSCA, G
BUSCAGLIA, V
LEONI, M
NANNI, P
[J]. CHEMISTRY OF MATERIALS, 1994, 6 (07) : 955 - 961
[5] SURFACE SITES ON SPINEL-TYPE AND CORUNDUM-TYPE METAL-OXIDE POWDERS
BUSCA, G
LORENZELLI, V
RAMIS, G
WILLEY, RJ
[J]. LANGMUIR, 1993, 9 (06) : 1492 - 1499
[6] VIBRATIONAL STUDY OF AND CONDUCTION MECHANISM IN BETA-ALUMINA .1. STOICHIOMETRIC BETA-ALUMINA
COLOMBAN, P
LUCAZEAU, G
[J]. JOURNAL OF CHEMICAL PHYSICS, 1980, 72 (02) : 1213 - 1224
[7] THE EFFECT OF PH ON THE ADSORPTION OF PALLADIUM (II) COMPLEXES ON ALUMINA
CONTESCU, C
VASS, MI
[J]. 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
GROPPI, G
BELLOTTO, M
CRISTIANI, C
FORZATTI, P
VILLA, PL
[J]. APPLIED CATALYSIS A-GENERAL, 1993, 104 (02) : 101 - 108
[10] GROPPI G, IN PRESS J SOLID STA

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