Aluminium technological properties

Some technological information on the Aerojet General Corporation s composite propellants technology was published recently [20]. Ammonium perchlorate is ground to the particle sizes ranging from 1 to 200 fx and then mixed to form a blend of the various particle sizes which gives the best mechanical and ballistic properties. Ammonium perchlorate is mixed with liquid polybutadiene-acrylonitrile fuel, liquid plasticizer and aluminium powder (Fig. 118). The motor casing is coated internally... 

Section 1 considers the methods of synthesis and physico-chemical properties of new types of inorganic sorbents (complex carbon-mineral sorbents, co-precipitated hydroxides, functional polysiloxane sorbents, porous glasses with controlled porosity, colloidal silicas, aluminium oxyhydroxide colloids, apatites). These sorbents are widely used in scientific investigations, in chemical practice and are important from a technological point of view. The presented results provide additional possibilities for the preparation of inorganic sorbents possessing unique adsorption and catalytic properties. Moreover, Section 1 presents the possibilities of the computational studies on the design of synthetic materials for selective adsorption of different substances. 

Yanzhou Coal aims to become a comprehensive provider of energy and fertilizer through healthy, sustainable and environmental-friendly growth, which benefits its shareholders, customers and employees. Thanks to its diversified business segments and innovative technologies, Yanzhou Coal has developed into a growth-oriented supplier of coal, coke, methanol, fertilizer and aluminium products, with the acquisition of Australian FeUx Resources in 2009 and the Potash Properties in Canada. 

The ability of microporous solids to act as high-capacity molecular sieves has long been exploited in a wide range of applications in adsorption and separation. The electrostatic interactions of the traditional cationic forms of aluminosilicates are well suited for the uptake of polar molecules (such as H2O) and are also able to separate oxygen from air. The development of microporous solids with varied chemistry has enabled adsorption and diffusion properties to be finely tuned for particular technologies. Pure silica zeolite polymorphs such as silicalite have particular importance, because they enable separation on the basis of a different range of polarity and on molecular size the absence of aluminium in the framework also prevents the presence of unwanted acidity, so adsorbed hydrocarbons do not undergo any catalytic transformation. 

All these aspects have to be optimised to get full benefits from VIP technology. As previously discussed, laminates incorporating a continuous aluminium foil provide, at present, the best gas barrier properties for VIP. Their main drawback is the loss of insulation properties at the panel flanges due to the relatively high thermal conductivity of the aluminium foil which reduces the overall insulating performance, this effect being directly related to the panel size and the aluminium foil thickness. 

Hamouda, A. M. S., Hashmi, M. S. J. Mechanical properties of aluminium metal matrix composites under impact loading. International Journal of Materials Processing Technology 1996 56 743-56. 

Ethylene-vinyl acetate copolymers, usually known as EVA, are used in many applications, but especially for low voltage cables. These polymers are easily flammable and flame retardants are added to reduce their flammability. The classic solution is to incorporate aluminium hydroxide or magnesium hydroxide that develop endothermic reactions when heated. Nevertheless, large amounts have to be incorporated, often around 60% and this can lead to a loss of mechanical properties in the compound. Intumescent technology that works well with polypropylene has also been tried for EVA polymer systems. 

Aluminium Arsenide (AlAs). Only a small amount of reliable data exists on the transport properties of AlAs. Most results are extrapolations from data obtained from the technologically more important solid solutions of type Al cGai jAs. At roomtemperature, values of the electrical conductivity of around 10f2 cm have been found. 

Croccolo, D., de Agostinis, M., Vincenzi, N. (2011). Experimental Analysis of Static and Fatigue Strength Properties in Press-Fitted and Adhesively Bonded Steel-Aluminium Components. Journal of Adhesion Science and Technology, 25(18), 2521-2538. 

Steiner P, Kozlowski F, Wielunski M et al (1994) Enhanced blue-light emission from an indium-treated porous sihcon device. Jpn J Appl Phys 33 6075-6077 Stievenard D, Deresmes D (1995) Are electrical properties of an aluminium-porous silicon junction governed by dangling bonds Appl Phys Lett 67 1570-1572 Sze SM (1985) Semiconductor devices physics and technology. Wiley, New York Tsai C, Li KH, Sarathi J et al (1991) Thermal treatment studies of the photoluminescence intensity of porous silicon. Appl Phys Lett 59 2814-2816... 

T-gard-5000, from Laird Technologies, is a high temperature polyamide film with a ceramic-filled conformal coating and is used in apphcations where the properties of electrical insulation and thermal conductivity are required simultaneously. This could be a requirement for electronic components attached to an aluminium heat sink, for example. 

Speaker cone - film Audio Technology Engineering Superior acoustic properties versus PP, paper, aluminium. Fatigue performance... 

Ultrahigh barrier properties are also needed for food packaging appfica-tions in aromatic products, resealable pouches and dehydrated products as well as packaging applications in vacuum and other modified atmospheres. Aluminium, EVOH or other high barrier materials and technologies are... 

Connolly, B. J., Meng, Q., Moran, A. L. and Mccaw, R. L. 2004. Mechanical and precorroded fatigue properties of coated aluminium aircraft skin system as function of various thermal spray processes. Corrosion Engineering Science and Technology, 39, 137-142. 

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