AlN/epoxy composites with high thermal conductivity were successfully prepared by infiltrating epoxy into AlN porous ceramics which were fabricated by gelcasting of foaming method. The microstructure, mechanical, and thermal properties of the resulting composites were investigated. The compressive strengths of the AlN/epoxy composites were enhanced compared with the pure epoxy. The AlN/epoxy co...

A sensitive and precise electrothermal atomic absorption spectrophotometric method for determining bismuth concentration is described. Protein precipitation and the use of a palladium modifier reduce the problems of foaming and permit the use of a higher ashing temperature. The detection limit of the assay is 0.9 nmol/L. Total CVs (intra- and interassay) for serum ranged from 3.5% to 15.1% and ...

Aluminum foam that is lightweight with high specific strength, energy absorption and other characteristics can be used in aerospace, transportation, machinery manufacturing fields. The PCM method usually to prepare closed-cell aluminum foams. microsized foams made by this process solve the non-uniform pore structures caused liquid drainage during foaming of large surface morphology internal str...

Foaming properties of dilute aqueous nonionic fluorinated surfactants, perfluoroalkyl sulfonamide ethoxylate, C8F17SO2N (C3H7)(CH2CH2O)nH (abbreviated as C8F17EOn, n = 10, 20) has been studied at 25°C. Both the surfactants produced a large volume of foams that are stable for several hours to a few days depending upon the surfactant concentration. The foam stability increases with increasing the...

Systematic experimental study of the physico-chemical factors controlling the foaming and defoaming performance of several Pluronic nonionic block copolymers is performed in solutions of sodium caseinate. Dynamic light scattering measurements and microscopic observations confirm that a significant defoaming is observed above the cloud point of the nonionics, which is almost independent on the p...

We were able to produce the first ever meltderived bioactive glass scaffold that met the requirement of an ideal bone scaffold by using the gel-cast foaming process and a new glass composition. However, initially a small fraction of sodium potassium sulfate crystals formed during processing. The purpose of this work was to study and prohibit the growth of those crystals, which was the result of...

In this work, polystyrene was filled with carbon black (CB) at 1, 3, and 5 wt% were foamed via microwave-assisted (MA) foaming. The composite morphology tracked by scanning electron microscopy, transmission rheology. CB played the dominant role as selective microwave absorbers to provide required heat for cell nucleation growth. MA foaming is a controllable technique reach proper foam density s...