The raw material of the high borosilicate glass bottle glass USES

raw materials of high borosilicate glass bottles are as follows: quartz sand, SiO2) , borax, Na2B4O7· 10H2O) And boric acid ( H3BO3) , sodium nitrate, NaNO3) , aluminum hydroxide ( Al( 哦) 3) , salt, NaCl) And fluorine sodium silicate ( Na2SiF6) And broken glass.
1. Quartz sand: mainly introduce silica ( SiO2） 。 It's important to silica glass oxide formation, in the glass with silicon oxygen tetrahedron [ SiO4] Is composed of a contiguous sequence of structure, the structure of the unit to form irregular glass frame. Silica can reduce the thermal expansion coefficient of glass, to improve the thermal stability, chemical stability of the glass, softening temperature, heat resistance, hardness, mechanical strength, transparency and viscosity.
2. Borax: when melted at the same time the introduction of Na2O and B2O3, B2O3 volatile. B2O3 can reduce the thermal expansion coefficient of glass, to improve the thermal stability, chemical stability of the glass, to improve the luster of the glass, enhance the mechanical strength of eco-friendly tube. B2O3 can lower the viscosity of the glass in high temperature, at low temperature, increase the viscosity of the glass. B2O3 also help fusion effect.
3. Boric acid, high temperature thermal decomposition into molten B2O3. The effect of B2O3 as above stated in the borax.
4. Aluminum hydroxide: pyrolysis generating Al2O3, Al2O3 can improve the glass in glass chemical stability, increase the mechanical strength, and can reduce the eco-friendly tube crystallization tendency. Al2O3 can also reduce the thermal expansion coefficient of eco-friendly tube, enhance the thermal stability of glass, glass melt on the refractory erosion, but the glass Al2O3 content increases the melt viscosity increased significantly.
5. Salt, salt during high temperature gasification volatilization, promote the clear glass.
6 fluorine sodium silicate, sodium fluosilicate as a clarification, cosolvent and opacifying dhi.
7) sodium nitrate: NaNO3 melting point and low decomposition temperature, thermal decomposition of Na2O, N2, O2, and silica ( SiO2） Form a eutectic material, at the same time also have strong oxidation and clarification effect, thus speeding up the glass melted.
was broken glass: the broken glass not only can make use of waste, and under the reasonable use, can also speed up the glass melting process, reduce the heat consumption of melted, and reduces the production cost of the glass and increase production.
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