EFFECTS OF TEMPERATURE ON THE FLOW AND TENSILE STRENGTHS OF POWDERS

被引：32
作者：
PILPEL, N
BRITTEN, JR
机构：
[1] Department of Pharmacy, Chelsea College, University of London, London, SW3 6LX, Manresa Road
来源：
POWDER TECHNOLOGY | 1979年 / 22卷 / 01期
关键词：
D O I：
10.1016/0032-5910(79)85005-6
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Measurements have been made of the flow rates and tensile strengths of a variety of powders - magnesia, lactose, fatty acids, organic drugs - over a range of temperatures from -20° to 200 °C. The results have been explained in terms of the effects of temperature on the hardness and elasticities of the materials concerned, and the distances between the particles. Under compression, the asperities on their surfaces deform plastically and may melt, if the temperature is raised above about 0.9 of the conventional melting point in K, to form welded bonds. The activation energy of bonding for the different materials is between about 8 and 11 kJ mole-1. © 1979.
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页码：33 / 44
页数：12
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