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The chemical composition and composition of borosilicate sight glass

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The chemical composition and composition of borosilicate sight glass

The chemical composition and composition of borosilicate sight glass

Borosilicate sight glass is a special glass material with low expansion rate, high temperature resistance, high strength, high hardness, high light transmittance and high chemical stability. Compared with general-purpose glass, it has no toxic and side effects, and its mechanical properties, thermal stability, water resistance, alkali resistance, acid resistance and other properties are greatly improved. It can be widely used in chemical, aerospace, military, home, hospital and other fields. Xiamen Yiweite is a domestic manufacturer of high-quality borosilicate materials, and its products include borosilicate glass mirrors, glass mirrors, and glass mirrors. The melting part of the float glass melting furnace is the part where the melt of the batch material is melted to make the liquid clarified and homogeneous. The smelting section is composed of a smelting zone and a refining zone before and after the upper and lower sides. In addition to the use of quartz, sodium carbonate, calcium carbonate and conventional glass, boron is also used in the production of borosilicate glass.
So what is the chemical composition of the borosilicate glass sight glass? Generally, the resulting glass composition is about 70% silica, 10% boron oxide, 8% sodium oxide, 8% potassium oxide, and 1% calcium oxide (lime). Although it is more difficult to make than traditional glass. The upper space is also called the flame space, which is composed of the front wall, the glass surface, the vaulted kiln roof and the kiln wall surrounded by flame-filled walls; the lower kiln consists of the bottom and the wall. Boron mirror glass has a wide range of uses, that is, the role of the melting zone is to form glass through physical and chemical reactions at high temperatures, and the clarification role is to quickly discharge the formed glass bubbles to achieve the quality required for glass production.
The results show that the linear expansion coefficient of boron-doped sight glass is 2.0±0.1×10-6/K, and sodium oxide (Na2O), boron oxide (B2O2), and silicon dioxide (SIO2) are the basic components of glass. The glass components with higher borosilicate content are boron: 12.5% ​​to 13.5%, silicon: 78% to 80%. Such glass is high borosilicate glass.
Boron oxide can form glass with many oxides and fluorides that cannot form glass. According to the requirements of ultra-high refractive index, low dispersion, special dispersion, electric vacuum sealing glass, radiometer, and ultra-high thermal expansion coefficient of measuring instrument glass, the performance of optical glass can be adjusted in a larger range. Radiant glass is made of salt glass. to make.
The boron-like liquid bubble in the glass is a kind of gas inclusion visible to the naked eye. It not only affects the appearance quality of the glass, but more importantly, it affects the transparency and mechanical strength of the glass. It is a glass defect that can easily attract attention. There are many reasons for bubbles, and the situation is complicated. Bubbles related to melting, regeneration bubbles (reboiling bubbles), external bubbles, refractory bubbles, and bubbles caused by metallic iron are not within the scope of this article. Only the bubble defects in the forming process of float glass are discussed here. Bubbles related to molding can be divided into upper surface bubbles and lower surface bubbles.

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