The following editor talks about the technological characteristics and development trend of fused silica sand:

The production process of quartz crucibles for polycrystalline silicon ingots (quartz square crucibles) puts forward strict process requirements for the firing process, especially fused silica crucibles for quasi-single crystal ingots.

The morphological development trend of quartz crucibles for polysilicon ingots is: large pieces (G6 quartz square crucible specifications reach 1040mm×1040mm×500mm), thin walls (16mm-20mm), and rapid cooling is required in the initial cooling process (crystallization process of fused silica Claim).

Fused silica crucibles for quasi-single crystal ingots also provide higher overall performance to the product, such as better strength and thermal conductivity, lower apparent porosity and thermal expansion coefficient, more uniform density distribution, and so on. In response, the industry's kiln supplier ASBKILNS launched&"Composite Pulse Combustion Control Technology GG" and&"Quick Cooling System GG" in October 2011, and applied it to the quartz square crucible furnace (quartz Square crucible shuttle kiln, quartz square crucible tunnel kiln) equipment can make large and thin-walled quartz square crucible products obtain a more uniform thermal field and rapid cooling rate during the heating and heat preservation process, which greatly improves the burning of the quartz square crucible Into the pass rate.

Quartz sand is a hard, wear-resistant, chemically stable silicate mineral. Its main mineral component is SiO2. The color of quartz sand is milky white, or colorless and translucent, with a hardness of 7, which is brittle without cleavage. Shaped fracture, grease luster, density 2.65, bulk density (1.6 for 1-20 mesh), 1.5 for 20-200 mesh, its chemical, thermal and mechanical properties have obvious anisotropy, insoluble in acid, slightly soluble in KOH Solution, melting point 1750°C.

Common specifications of quartz sand are: 0.5-1mm, 1-2mm, 2-4mm, 4-8mm, 8-16mm, 16-32mm, 10-20 mesh, 20-40 mesh, 40-80 mesh, 100-120 mesh.

The above is the process characteristics and development trend of fused silica sand briefly described by the editor. You can simply understand it. The content is for your reference only, you can contact us for more inquiries