Edit this paragraph the basic nature of the physical properties of folding folding [1], also known as silica, silica, chemical formula SiO ?. Naturally occurring crystalline silica and amorphous silica two kinds. hjmk.xyygf.com crystalline silica due to different crystal structure, divided quartz, tridymite and cristobalite three. Pure silica as colorless crystals, large transparent quartz called prismatic crystals. If they contain trace impurities in the crystal with different colors of nano-silica with amethyst, citrine, smoky quartz and so on. Ordinary quartz sand is fine, there is yellow sand (more iron impurities) and white sand (fewer impurities than the pure). Silica crystals, four valence electrons with four oxygen atoms of silicon atoms forming four covalent bonds, the silicon atom in the center of nano silica tetrahedron sales, four oxygen atoms are located in four regular tetrahedron the apex angle of nano silica nature, many of such tetrahedral angle turn is connected via an oxygen atom, and each oxygen atom is tetrahedral total of two nano-silica Company, i.e. each oxygen atom with two silicon atoms combination. SiO? Is the simplest type composed of only the ratio of the number of silicon atoms in crystalline silicon dioxide and oxygen Fig. Silica is the atomic crystal. SiO? Bond Si-O bond energy is high, the melting point, high boiling point (melting point 1723 ℃, boiling point 2230 ℃). Refractive index of about 1.6 for the refractive index of various silica products: quartz sand as 1.547; 1.544 quartz powder; quartz vein 1.542; diatomite from 1.42 to 1.48; fumed silica 1.46; white charcoal precipitation Black is 1.46. Diatomaceous earth is naturally occurring amorphous silica, low aquatic diatoms are the remains of a white solid or powder, porous, lightweight, soft solid, strong absorption. The basic purpose of this section is folded editor manufacturing silica glass, quartz glass, water glass, optical fiber, an important part of the electronics industry, optical instruments, crafts and refractory materials, is an important material for scientific research. Silica uses: flat glass, glass, foundry sand, glass fibers, ceramic glaze, rust by sandblasting, sand filtration, flux, refractories and manufacture lightweight bubble concrete (Autoclaved Lightweight Concrete). Silica is very versatile. Crystal relatively rare in nature can be used to manufacture an important component of the electronics industry, optical instruments and crafts. Silica is an important raw material in the manufacture of optical fiber. Generally more pure quartz, quartz glass used to make. Quartz glass expansion coefficient is very small, equivalent to 1/18 of ordinary glass, can withstand drastic changes in temperature, good acid resistance (except HF outside), thus, the quartz glass used to manufacture high-temperature chemical instruments. Quartz glass used as raw materials and supplies. Nano-silica reputation, nano-silica, Weifang Fuyuan provided by the Environmental Protection Technology Co., Ltd. Weifang Fuyuan. Weifang Fuyuan Environmental Protection Technology Co., Ltd. (www.wfdafuyuan.com) (www.wfdafuyuan.com) strong, credible, Shandong Weifang other industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Weifang Fuyuan and you hand into the brilliant, for a better future! You can also access (www.wfdafuyuan.com/supply_details_46405050.html), more information about the company.