Abstract Water glass and silica-alumina sol were used as adhesives, uniformly mixed with silicon carbide powder. The effects of binder, binder concentration, sintering temperature, process on the granularity reconstruction SiC powders studied in detail. results show that when water is binding agent, vacuum can effectively inhibit oxidation carbide, suitable granulation samples are obtained at a...

Abstract Nanotechnology is widely used in construction to advance high performance and durability materials, as represented by concrete, which nanomaterials such nanosilica (SiO 2 ), nano-alumina (Al O 3 nanotitanium oxide (TiO ) are replace cement a partial binder. Suitable amounts of adding these beneficial with regard the mechanical, economic, environmental aspects concrete.

The effect of an alumina-based binder on the structure a commercial Fe-ZSM-5 catalyst has been investigated. Several ex-situ characterization techniques were used to show that in formulation allows obtaining material possesses improved features terms Fe species dispersion, framework Al content and acidity. UV–Vis X-ray absorption spectroscopy showed extent agglomeration extruded was significant...

The preparation of catalysts suitable for MTG processes in a fluidized bed reactor has been studied with emphasis on improving the textural, physico-chemical, morphological, structural and mechanical properties. A mixture HZSM-5 zeolite (active material), boehmite or bentonite (binder) alumina (inert filler) was used to prepare different catalysts. After preparation, characterization by physica...

The article describes the technology of obtaining a highly effective composite radiation-protective material based on titanium-coated fraction titanium hydride and alumina cement binder. physical mechanical properties resulting are investigated. results an experimental study with respect to gamma neutron radiation presented. Point isotopic sources fast neutrons Pu-α-Be (neutron energy - 4.5 MeV...

Thin ceramic layers have been fabricated by dipping green tapes of alumina, formed by the doctor-blade casting method, into aqueous slurries containing mixtures of alumina and either unstabilized zirconia (MZ–ZrO2) or mullite. It was observed that the formation of a thin layer on the surface of the tape is governed by both liquid entrainment and slip-casting mechanisms, and was accelerated by i...

At present, the most commonly used building material is ordinary Portland cement (OPC). However, OPC has a negative environmental effect during synthesis, with the release of significant amount of CO2 greenhouse gas. The cement industry is responsible for 5-8% of total global anthropogenic CO2 emissions. Geopolymerization is a technology capable of turning industrial wastes into strong and chem...

The basic element of the design a power module is metallized ceramic substrate. In this work, formation metallization coatings by method thermal transfer pastes (Mo-Mn-Si + binder) for alumina and aluminum nitride ceramics was carried out. fixing coating on substrate performed firing at temperature 1320 °C. subsequent deposition copper layer out cold gas-dynamic spraying (CGDS) followed anneali...