Plastic-to-Brittle Transition of Consolidated Bodies: Effect of Counterion Size
作者： George V. Franks , Miroslav Colic , Matthew L. Fisher , Fred F. Lange
关键词: Adsorption 、 Ion 、 Rectangular potential barrier 、 Chemistry 、 Binding energy 、 Slurry 、 Electrolyte 、 Chemical physics 、 Brittleness 、 Counterion 、 Mineralogy
摘要: Abstract The effect of ion size on the force necessary to remove counterions from surface when particles are forced into contact (primary minimum) was investigated. Alumina slurries dispersed at pH 12 and then coagulated with 0.5 M Li + , Cs tetraethylammonium (TEA ) chlorides were consolidated by pressure filtration different applied pressures. Uniaxial compression tests performed determine plastic-to-brittle transition for bodies formulated each counterions. Brittle produced pushed together form a strong touching network. required push is related slope repulsive potential barrier, steeper slopes requiring greater force. consolidation brittle behavior small such as compared TEA . results presented here show that resistance pushing bare counterion in weakly attractive (salt-coagulated) slurries. That is, barrier slurry smaller ions steeper. This result consistent idea more strongly bound surface, well fact repulsion due finite occurs interparticle separation distances
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