6 research outputs found
Use of Byproducts of Acidic Processing of Aluminium β Bearing Raw Materials in Production of Heat Insulating Materials
The principal possibility to use byproducts of acidic processing of aluminium-bearing raw materials as the main component of batch to obtain a heat insulating material using low-temperature technology is established. The compositions suitable to obtain low-temperature frit and a foam glass material on its basis are developed. The obtained material has improved physical β mechanical properties in comparison with conventional foam glass from broken glass
Glass composite modified with silicon carbide and gallium arsenide, that absorbs electromagnetic radiation
The possibility of using waste of semiconductor manufacturing containing silicon carbide and gallium arsenide as an effective additive in radio absorbing material preparation was established as a result of research. The resulting material meets the requirements of effective porous electromagnetic radiation absorbers of extremely high frequency range: maximum absorption and minimum reflection of electromagnetic radiation, fire safety, the minimum allowable level of toxic and hazardous substances
Using quartzofeldspathic waste to obtain foamed glass material
The present paper proposes a method for the processing of mine refuse non-ferrous metal ore in the production of foamed glass. The subject of this research is a low-temperature frit synthesis (<900 Β°C), allowing for the high-temperature glass melting process to be avoided. The technology for the production of frit without complete melting of the batch and without using glass-making units offers a considerable reduction in energy consumption and air pollution. It was found that material samples obtained with a density of up to 250βkg/m3 are of rigidity (up to 1.7βMPa) in comparison with the conventional foamed glass (1βMPa). This increased rigidity was due to the presence of crystalline phase particles in its interpore partition of less than 2βΒ΅m in size. Material with a density of 300βkg/cm3 is recommended for thermal insulation for the industrial and construction sectors. At densities above 300βkg/cm3 and a strength of 2.5βMPa, the purpose becomes heat-insulating construction material. The proposed method for obtaining a porous material from waste widens our choice of raw materials for foamed glass, whilst saving resources and energy
The foam-glass material for a radio frequency echoless chambers
The conducted experiment of foam glass modification by carbon nanotubes shows increased radio absorbing properties in comparison with a foam glass without additives. Addition of carbon nanodimensional tubes in number of 1,5 wt.% increases a tangent of dielectric losses angle by 2,5 times. The coefficient of electromagnetic radiation absorption in the range of frequencies of 120 - 260 GHz increases for a foam glass with carbon nanotubes (1,5 wt. %) twice in comparison with a foam glass without additives. The foam glass modified by carbon nanotubes is recommended as the effective radio absorbing material for the device of anechoic cameras. This material is fire safety, nonflammable, environmentally friendly, rather light-weight
Glass composite modified with silicon carbide and gallium arsenide, that absorbs electromagnetic radiation
The possibility of using waste of semiconductor manufacturing containing silicon carbide and gallium arsenide as an effective additive in radio absorbing material preparation was established as a result of research. The resulting material meets the requirements of effective porous electromagnetic radiation absorbers of extremely high frequency range: maximum absorption and minimum reflection of electromagnetic radiation, fire safety, the minimum allowable level of toxic and hazardous substances
Single-stage technogy for granulated foam glass production based on the composition of tripoli and technogical microsilica
The possibility of foam glass production by means of one-stage technology based on the natural tripoli and technogenic silica is determined. 45 % sodium hydroxide solution is used for the synthesis of foam glass. The addition of microsilica as an extra component in an amount of 10 to 50 wt. % in batch component increases the strength of the obtained material to 4 MPa and reduces foaming temperature from 870 to 830 Β°C. The increased mechanical strength of the material is due to the residual quartz dissolution and cristobalite crystallization. The samples obtained from batch with 30 wt. % microsilica have maximum strength