The viscous flow behavior of a 12.5 vol% hydrophobic fumed silica (Aerosil® R816) suspension in polypropylene glycol low molecular weight (PPG400) was studied stress-controlled rheometer. steady curve showed shear thickening between two thinning regions. Time-dependent viscosity response provoked by step changes stresses corresponding to the shear-thickening region apparently agrees with thixot...

Zeolites are the catalytic materials that widly applied in processing of conventional and renewable fuels chemicals. The present study provides a comprehensive analysis factors controlling acidic medium synthesis high silica silicalite-1 zeolite. effect various sources (TEOS, fumed colloidal silica) alkali metal cations (Na K) on formation is studied. efficiency different types seeds (micron-si...

In this paper, a planar monopole antenna is introduced, also we added some new Nano fillers such as Fumed Silica and Aluminum Oxide to RT Duriod5880 and RO3003 to produce new Nano composite materials, then new Nano composite materials are used as a substrate of a ultra-wideband monopole antenna. Antenna characteristics are considered to illustrate that, by using these Nano composite materials, ...

Abstract Silica is one of the most important reinforcing fillers in rubber industry. As an excellent agent, it can endow with higher tensile strength, elongation at break, elasticity, heat resistance, tear etc., and widely used products. BIIR has good air tightness, fatigue aging chemical processing performance, so tires other industries. In this paper, three hydrophobic nano-powder materials, ...

Ready transformation and reactivity is observed at the nanoscale. Silica/silicon (SiOx) nanospheres of diameter %30 nm generated from equimolar Si/SiO2 mixtures are found to display enhanced catalytic and reactive properties relative to commonly employed silica support surfaces including fumed silica. A unique oxygen deficient synthesis has been used to generate SnO2Kx nanowires, nanoribbons, a...

In this study, we examined three kinds of stabilizing additives to prepare stable MRF with good fluidity. We selected additives; a styrene isoprene block copolymer, hydrophobic fumed silica, and an organogelator (CMOL SB03; PMDA-2C 8 /oleyl). measured the rheological properties both for dissolutions in base oil MRFs prepared by using rheometer; MCR302 (Anton Paar Corp.). From experimental resul...