Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Abstract A powder is an assembly of fine solid particles. It has, therefore, in general a very large surface area per unit weight (specific surface area) and a high surface energy resulting from numerous lattice defects existing on the surface. These characteristics could contribute to the increase of chemical reactivity of the solid surface and apply, for instance, to the preparation of ceramics. Further, knowledge of the surface activity of fine particles is also very useful in studies of adsorption and the catalytic action of solids. On the other hand, in connection with unit operations in chemical engineering, the bulk properties of powders have been investigated in relation to rheological phenomena such as compressibility, flowability, mixing and so on, which depend on interactions such as friction and aggregation between particles. However, quantitative relationships between the micro-view of particles derived from physicochemistry and the macro-view of particles from powder technology have still not been established at the present time.
Abstract A powder is an assembly of fine solid particles. It has, therefore, in general a very large surface area per unit weight (specific surface area) and a high surface energy resulting from numerous lattice defects existing on the surface. These characteristics could contribute to the increase of chemical reactivity of the solid surface and apply, for instance, to the preparation of ceramics. Further, knowledge of the surface activity of fine particles is also very useful in studies of adsorption and the catalytic action of solids. On the other hand, in connection with unit operations in chemical engineering, the bulk properties of powders have been investigated in relation to rheological phenomena such as compressibility, flowability, mixing and so on, which depend on interactions such as friction and aggregation between particles. However, quantitative relationships between the micro-view of particles derived from physicochemistry and the macro-view of particles from powder technology have still not been established at the present time.
Powder fundamentals
Arai, Yasuo (Autor:in)
01.01.1996
66 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Fundamentals of Selective Laser Sintering of 316 Stainless Steel Powder
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