Archive for the ‘Quartz’ Category
Monday, February 11th, 2008
In case you haven't heard, quartz infrared heaters are the "hot" item this heating season. Although they've been around for 20 years, homeowners are only now discovering this inexpensive heater that costs nothing to install or maintain and heats your favorite living space for only pennies a day.
At the heart ...
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Monday, February 11th, 2008
Silestone countertops are the latest trend in kitchen design. Silestone is unique because it is made of quartz which gives it several advantages over other kitchen countertops. Only diamonds, sapphires and topazes are harder than quartz. Silestone countertops are stronger than most countertops made from natural substances such as granite ...
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Monday, February 11th, 2008
Stones like the soapstone and quartz are rarely known but they have significant importance in countries like China in their religious life besides their other uses in articles and figure. Here you will know more of them in more details.
Soapstone
After jade, the principal stone carved by the Chinese is soap-stone, ...
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Friday, July 6th, 2007
One metal whose growth in the past century has been unsurpassed is aluminium. Its strength and light weight guarantees its demand, especially in transportation where fuel efficiency is paramount.
The Bayer Process
The alumina process used today is essentially the one invented by Karl Bayer in 1887. This uses sodium hydroxide to ...
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Friday, July 6th, 2007
Refractory materials can support high temperatures, thermal strength and the contact with aggressive environments, for this reason they are widely used in the cement, glass and steel industry. Commercial AZS (alumina-zirconia-silica) refractories are a good alternative in refractory materials for the glass industry because they can support the aggressive conditions ...
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Friday, July 6th, 2007
Glass
By blending quarry products (sand, kaolin, limestone, colemanite) at 1600°C, liquid glass is formed. The liquid is passed through micro-fine bushings and simultaneously cooled to produce glass fibre filaments from 5-24mm in diameter. The filaments are drawn together into a strand (closely associated) or roving (loosely associated), and coated with ...
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Tuesday, July 3rd, 2007
Deep space-based research by NASA called for a high energy solar concentrator that could focus from 3.5” to a faceted point over a 12” length. Designers had initially tried sapphire as the material best suited to this application. However, it failed under Beta tests so NASA turned to a fused ...
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Tuesday, July 3rd, 2007
A geopolymer was prepared by dissolving metakaolinite in a solution of K2SiO3 and KOH and curing at 80°C for 24 h. It was progressively heated from ambient to 1400°C in air and the phase changes were studied by X-ray diffraction analysis, scanning electron microscopy and energy dispersive X-ray spectroscopy. Only ...
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Tuesday, July 3rd, 2007
The recycling technology of sludge from water purification plant was investigated using hydrothermal reaction. The calcined sludge at 600°C for the removal of organic compound was mixed with 0 - 20 mass% of Ca(OH)2. Specimens were formed by uniaxial pressing at 30 MPa and hydrothermal treatment under saturated steam pressure ...
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