On Water-soluble Alumina Sand Mold Bonded by Sodium Aluminate/CO2

Adsorption of sodium hexanoate on α-alumina.

Neutron reflection and adsorption isotherm measurements have been used to study the adsorption behaviour of hexanoic acid onto α-alumina surfaces. Importantly, the pH dependence of the behaviour has been characterised with a pronounced maximum in adsorption identified at a pH of approximately 5, close to the pKa of the acid. The adsorbed layer is identified as a bilayer, which is reasonable giv...

Water reduction by photoexcited silica and alumina.

Excess electrons in solvent are amongst the most fascinating chemical species, at the very edge between physics and chemistry. In this contribution, we report the use of silica and alumina photochemistry to create and stabilize aqueous solutions of electron.

Composite Adhesive-Bonded Joint Reinforcement by Incorporation of Nano-Alumina Particles

Adhesive bonding technology is being used in a variety of modern industries, including the automotive, aerospace, maritime, construction, defense and so on. On the other side, polymeric nano - composites attracted both academic and industrial interests in the past decades. The scope of this paper is experimental investigation on the effects of the addition of Alpha-alumina nanoparticles to the ...

Enhancing Surface Roughness of Castings When Sand-resin Mold Casting

T. Kovalyova, E. Eremin, S. Arinova, I. Medvedeva, A. Dostayeva, Karaganda State Technical University, Karaganda, Kazakhstan, Omsk State Technical University, Russia. In this connection, studies aimed at improving the obtaining process of high-quality castings of mining equipment are relevant. At the same time there is a need for studying physical and mechanical relationship of mixes in which a...

Sand Mold Press Casting with Metal Pressure Control System