Synthetic Silica

Place of origin: Dalian
Grade: Excellence
Coefficient of thermal expansion: 0.01
Category: Block tablets
Refraction coefficient: 1.62
Melting point: 1750
Density: 2.60(g/cm3)
Whiteness: 86
pH value: 8

6-8cm synthetic silica
1. Technological Characteristics
Determine the value of industrial applications, silica is characteristic of the process: Silica hard, Mohs hardness of 6 or so, have excellent fire resistance and acid resistance, melting point 1730, the melt after cooling into a quartz glass, crystal to crystal, with a transparent UV light had the ability and piezoelectricity.

2. Main purpose
1) Metallurgical industry: Mainly for the manufacture of refractories - silica, smelting silicon alloys (ferrosilicon, manganese, silicon and chromium), and for the flux. Quality of pure crystalline silicon can be prepared. Crystalline silicon is the main raw material for production of silicon, but also the system alumina and silicone.
2) Glass industry: Manufacture of glass, silica is the main raw material. Silica can be used for ordinary and optical glass, may melt into a mass of pure high-quality technical glass. Bricks can be used for glass furnace kiln lining.
3) Construction industry: Can be used as an important cornerstone of the building. Can be filled with gravel for road stone and railway ballast. Sand can be mixed with asphalt paving, portland cement can be made of quartz calibration material.
4) Chemical Industry: Silica can produce a variety of silicate and silicide and nitrates, good quality may be sulfuric acid tower in the filling.
5) grinding industry: Quartzite and quartz sandstone can be made terrazzo, stone, sandpaper and abrasive materials such as silicon carbonate; Quartz sand are mostly used for sawing stone, polished glass, metal and stone products, grinding the surface of quartz is also used to pondering jewelry.
6) Other industry: Can be used for enamel and ceramic materials. Are widely used in pure quality radio industry, ultrasonic technology and modern national defense and cutting-edge technology, pure quartzite with optical and ultraviolet light through the performance, can produce a variety of optical instruments and medical use of quartz lamps, etc., also manufacture silicon carbide (carbide silicon) of the basic raw materials. Fine quartz sand can be used for filtration.

Quality specifications:
(1) 9-11cm of products accounted for 90%, other 10% of the product specification for the 5-13cm.
(2) smooth is good. 99.8% silicon content
(3) product surface mud and other impurities without