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Books > Professional & Technical > Mechanical engineering & materials > Materials science > Testing of materials
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Small Particles Technology (Paperback, Softcover reprint of hardcover 1st ed. 1998)
Loot Price: R4,636
Discovery Miles 46 360
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Small Particles Technology (Paperback, Softcover reprint of hardcover 1st ed. 1998)
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It is difficult to imagine modem technology without small
particles, 1-1000 nm in size, because virtually every industry
depends in some way on the use of such materials. Catalysts,
printing inks, paper, dyes and pigments, many medicinal products,
adsorbents, thickening agents, some adhesives, clays, and hundreds
of other diverse products are based on or involve small particles
in a very fundamental way. In some cases finely divided materials
occur naturally or are merely a convenient form for using a
material. In most cases small particles play a special role in
technology because in effect they constitute a different state of
matter because of the basic fact that the surface of a material is
different from the interior by virtue of the unsaturated bonding
interactions of the outermost layers of atoms at the surface of a
solid. Whereas in a macroscale particle these differences are often
insignificant, as the 9 surface area per unit mass becomes larger
by a factor of as much as 10, physical and chemical effects such as
adsorption become so pronounced as to make the finely divided form
of the bulk material into essentially a different material usually
one that has no macroscale counterpart."
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