Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Nano-sized aluminum powders

The AI-H2O reaction increases the temperature and the number of moles of gas in the bubble by the production of H2 molecules. The pressure in the bubble is thereby increased. As a result, the bubble energy and shock wave energy are increased. It must be understood that the oxidation of aluminum powder is not like that of gaseous reactants. Reaction occurs at the surface of each aluminum particle and leads to the formahon of an aluminum oxide layer that coats the particle. The oxidized layer prevents the oxidation of the interior particle. The combustion efficiency of aluminum parhcles increases with decreasing particle size.l =l The shock wave energy and bubble energy are increased by the use of nano-sized aluminum powders. [Pg.271]

Nano particles, such as aluminum powder, quartz and multiwalled carbon nanotubes were added to aniline prior to its polymerization." Glass transition temperature depended on whether nucleating agent was present or not." Addition of nucleating particles also decreased degradation rate to various degrees depending on the particle size and its specific surface area." ... [Pg.139]

Yttrium aluminum garnet (YAG) doped with trivalent cerium was synthesized by Lu et al. (2002) from nitrate salts of yttrium, cerium and aluminum, as also polyvinyl alcohol and urea. A sol was obtained by homogenization at 100°C for 2 h heating at 250°C for 2 h yielded a yellow gel. Calcination of the gel at 800-1100°C for 4 h produced phase-pure nano- or micrometer-size powders ofYAG Ce +. Under specific conditions of preparation, the particles could be as small as 20 nm. [Pg.153]


See other pages where Nano-sized aluminum powders is mentioned: [Pg.383]    [Pg.403]    [Pg.160]    [Pg.202]    [Pg.588]    [Pg.280]    [Pg.239]    [Pg.392]    [Pg.6]   
See also in sourсe #XX -- [ Pg.271 ]

See also in sourсe #XX -- [ Pg.271 ]




SEARCH



Aluminum powder, nano

Powder size

© 2024 chempedia.info