ENERGY-SIZE REDUCTION LAWS FOR ULTRASONIC FRAGMENTATION

被引：64

作者：

KUSTERS, KA ^{[1
]}

PRATSINIS, SE ^{[1
]}

THOMA, SG ^{[1
]}

SMITH, DM ^{[1
]}

机构：

[1] UNIV NEW MEXICO,NSF,CTR MICROENGN CERAM,ALBUQUERQUE,NM 87131

来源：

POWDER TECHNOLOGY | 1994年 / 80卷 / 03期

基金：

美国国家科学基金会;

关键词：

ULTRASONIC FRAGMENTATION; GRINDING ENERGY; CERAMIC POWDERS;

D O I：

10.1016/0032-5910(94)02852-4

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The energy requirement is a key criterion for the selection and use of a grinding process. Ultrasonic dispersion is extensively used to disperse submicron agglomerated powders in liquid suspensions. Suspensions of silica agglomerates were ground with solids concentration up to 50% by weight. The fragmentation or grinding rate is inversely proportional to suspension volume. Starting from a semiempirical expression that relates fragmentation rate to particle size, suspension volume and ultrasonic power, energy consumption laws for both eroding and non-eroding powders are developed. Experimental results supporting the energy consumption laws are given. Lower power input for ultrasonication favors efficient energy use. For eroding powders (e.g. silica, zirconia) the energy expenditure per unit powder mass (specific energy) by ultrasonic grinding is lower than that of conventional grinding techniques. In contrast, it is slightly higher than ball milling for non-eroding powders (e.g. titania).

引用

页码：253 / 263

页数：11

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