In this work, functionally graded materials were synthesized by centrifugal technique at different volume fractions 0.5, 1, 1.5, and 2% Vf with a rotation speed of 1200 rpm constant time, T = 6 min . The mechanical properties characterized to study the non-graded nanocomposites pure epoxy material. tests showed that added alumina (Al2O3) nanoparticles enhanced effect more than epoxy. maximum di...

Alumina is one of the most widely used ceramic materials as catalysts, catalyst supports and absorbents, and also wear resistant coating. This study focused on fabricating and characterizing of alumina ceramic nanoparticles fabricated using new and simple sol-gel method. Aluminium oxide (Al2O3) nanoparticles were synthesized by iron (III) nitrate 9-hydrate as precursor. Physicochemical properti...

Abstract The capability to fabricate ultra-low and customizable CTE materials with good mechanical properties in a simple method was demonstrated this work. For purpose, nano beta-eucryptite alumina powders were synthesized used the composite's fabrication. Four composites of second-phase prepared, containing 10, 20, 30, 40 wt.% beta-eucryptite. temperature effect on prepared is investigated. r...

This paper presents a hierarchically designed polymer nanocomposite approach in which nanofillers at ultralow volume loading generate large dielectric enhancement blends of high temperature polymers with tailored nanostructures. We blend poly(1,4-phenylenen ether sulfone) (PES) polymers, such as polyetherimide (PEI), that possess more coiled chain conformations to tailor nano-morphologies. Maki...

In this experimental study, the results of utilizing a nano-lubricant in place compressor work fluid refrigeration system were examined. R134a refrigerant was utilized system. Polyol ester (POE) used as base and prepared from alumina oxide (Al2O3) nanoparticles utilized. The experiments carried out separately with nano-lubricants created by mixing Al2O3 ratios 0.5% 1.0% into POE oil. Additional...

Low bearing capacity soils may pose serious construction concerns such as reduced and excessive hydro-associated volume changes. Proper soil remediation techniques must be planned implemented before commencing any on low soils. Environmentally friendly stabilizers are gradually replacing traditional with high carbon dioxide emissions lime cement. This study investigated the use of an alternativ...

The dispersion and coordination of aluminium species on the surface of silica-alumina based materials are essential for controlling their catalytic activity and selectivity. Al and Al are two common coordinations of Al species in the silica network and alumina phase, respectively. Al is rare in nature and was found hitherto only in the alumina phase or interfaces containing alumina, a behavior ...