Caking of amorphous powders - Material aspects, modelling and applications

被引：97

作者：

Hartmann, Markus ^{[1
]}

Palzer, Stefan ^{[2
]}

机构：

[1] Nestle Prod Technol Ctr, D-78224 Singen, Germany

[2] Nestle Res Ctr, CH-1000 Lausanne 26, Switzerland

来源：

POWDER TECHNOLOGY | 2011年 / 206卷 / 1-2期

关键词：

Caking; Amorphous powders; Sintering; Time consolidation; GLASS-TRANSITION; TEMPERATURE; AGGLOMERATION; MECHANISMS; STRENGTH; FORCES;

D O I：

10.1016/j.powtec.2010.04.014

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Caking of powders and bulk granules and adhesion of powders on equipment surfaces is a serious problem in the food, chemical and pharmaceutical industries. While caking of crystalline particles is tackled only briefly, this publication deals mainly with caking of water-soluble amorphous particles. Caking of amorphous particles starts with stickiness of the powder surface and can result in a collapse of the powder structure. The powder bulk turns from a free flowable powder bulk composed of single particles into a massive block. The material aspects (hygrocapacity, hygrosensitivity and viscosity) of water-soluble amorphous materials and sintering are discussed. The increase of the sinter bridges during caking could be modelled through the known sinter equations and measured by carrying out experiments in a ring shear cell. The calculated sinter bridge diameter could be correlated with the strength of the caked powder bulk measured in a ring shear tester. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：112 / 121

页数：10

共 38 条

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