Dispersion properties of alumina powders in silica sol

被引：40

作者：

Zhu, XW ^{[1
]}

Jiang, DL ^{[1
]}

Tan, SH ^{[1
]}

Zhang, ZQ ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2001年 / 21卷 / 16期

关键词：

Al2O3; dispersion; rheology; silica sol; suspensions; SiO2;

D O I：

10.1016/S0955-2219(01)00229-1

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The dispersion of alumina powders in silica Sol has been investigated by zeta potential, sedimentation, and rheological measurements. Zeta potential of alumina in silica Sol changes significantly in comparison with that of alumina in deionized water. This is caused by the absorption of silica colloidal particles with negative charge on the Surface of alumina particles. Sol-dispersed alumina slurry shows a minimum in sedimentation volume and viscosity around pH 10. The viscosity depends strongly on the silica Sol concentration and reaches a minimum in 10-15 wt,% silica sols. It is proposed that the dispersion and stabilization of alumina particles in silica sol are attributed to the electrostatic and steric effects of the colloidal particles absorption. Effects of pH, solids content and silica Sol concentration on the rheological behavior of sol-dispersed alumina slurries are discussed in detail. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：2879 / 2885

页数：7

共 21 条

[1] Processing of Al2O3/SiC composites in aqueous media
Assmann, S
Eisele, U
Boder, H
[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1997, 17 (2-3) : 309 - 317
[2] Processing of aqueous alpha-Al2O3, alpha-SiO2 and alpha-SiC suspensions with polyelectrolytes.
Baklouti, S
Pagnoux, C
Chartier, T
Baumard, JF
[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1997, 17 (12) : 1387 - 1392
[3] BARNES HA, 1989, INTRO RHEOLOGY RHEOL, V3, P133
[4] Optimising the dispersion on an alumina suspension using commercial polyvalent electrolyte dispersants
Briscoe, BJ
Khan, AU
Luckham, PF
[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1998, 18 (14) : 2141 - 2147
[5] BROCKMAYER JW, 1989, Patent No. 4885263
[6] PROCESSING OF HIGHLY CONCENTRATED AQUEOUS ALPHA-ALUMINA SUSPENSIONS STABILIZED WITH POLY-ELECTROLYTES
CESARANO, J
AKSAY, IA
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1988, 71 (12) : 1062 - 1067
[7] STABILITY OF AQUEOUS ALPHA-AL2O3 SUSPENSIONS WITH POLY(METHACRYLIC ACID) POLY-ELECTROLYTE
CESARANO, J
AKSAY, IA
BLEIER, A
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1988, 71 (04) : 250 - 255
[8] DISSOLUTION BEHAVIOR OF ALPHA-ALUMINA IN SOLUTIONS CONTAINING MG2+ IONS
HIRATA, Y
OTSUBO, Y
ARIMURA, Y
[J]. JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 1995, 103 (08) : 782 - 785
[9] HONGQUI T, 1998, THESIS SHANGHAI I CE
[10] Iler R.K., 1979, COLLOID SURFACE, P172

← 1 2 3 →