Low boron and fluorine glass formula

Abstract

The invention relates to a glass formulation, in particular to a low-boron low-fluorine glass formulation. In the prior E glass formulation, more boron and fluorine are contained, and the boron and the fluorine are easily volatile in the glass melting process, thereby causing the emission of waste gas to obvious increase, not only increasing production cost and but also easily causing the secondary pollution of solid waste. The invention provides the low-boron low-fluorine glass formulation, which is characterized in that the formulation comprises the following components in weight percentage: 54 to 60 percent of SiO2, 20 to 28 percent of CaO, 12 to 18 percent of Al2O3, 0 to 5 percent of B2O3, 2 to 6 percent of MgO, 0 to 0.4 percent of F, 0 to 0.8 percent of K2O and Na2O, 0.1 to 1 percent of TiO2, 0.1 to 0.5 percent of Fe2O3, 0 to 0.6 percent of SO3, and less than 1 percent of impurities. The glass fiber produced by the glass formulation has low boron and low fluorine and good performances.

Description

technical field [0001] The invention relates to a glass formula, in particular to a low boron and low fluorine glass formula. Background technique [0002] E glass is the most commonly used glass component for the production of continuous glass fibers, and E glass is also called alkali-free glass. The main advantage of E glass is that the difference between its log3 molding temperature and liquidus temperature (ΔT value) is relatively large, so devitrification is not easy to occur during the glass fiber molding process, and E glass can be melted and clarified at a relatively low temperature. [0003] However, the traditional E-glass formula contains a lot of boron and fluorine, which are volatile components during the glass melting process, which will lead to a significant increase in exhaust gas emissions. Since boron and fluorine are polluting substances, their discharge is strictly controlled by environmental regulations, which requires the construction of expensive wast...

AI Technical Summary

Problems solved by technology

[0003] However, the traditional E glass formula contains more boron and fluorine, which are volatile components in the glass melting process, which will lead to a significant increase in exhaust gas emissions

Since boron and fluorine are polluting substances, their discharge is strictly controlled by environmental regulations, which requires the construction of expensive waste gas treatment facilities to ensure that the discharged waste gas meets the environmental protection standards stipulated by the state, which not only increases production costs, but also easily causes Secondary pollution of solid waste

[0004] Therefore, in order to reduce environmental pollution and reduce the production cost of glass raw materials, low-boron or low-fluorine glass formulations have been developed abroad, but there are many defects in known low-boron or low-fluorine glasses.

For example, the glass disclosed in British Patent GB520427 has a small ΔT value and is prone to devitrification; another example is the glass disclosed in US Patent No. US4542106. Although there is no boron and fluorine, a large amount of titanium dioxide is used. Causes glass to have an unsuitable color

At present, there is no low-boron and low-fluorine glass formula in China.