High borosilicate 4.0 fireproof glass is a type of glass developed on the basis of traditional 3.3 high borosilicate glass, which is suitable for building safety and fire prevention. In addition to superior fire resistance and good heat shock resistance, it also has the following advantages: 3.3 ultra-high chemical stability, high borosilicate 4.0 fireproof glass. Based on its special glass composition, its excellent chemical stability can be analyzed and compared in terms of acid resistance, water resistance, and alkali resistance. 3.3.1 Acid and Water Resistance: The erosion of glass by acid and water begins with the exchange of H+ions and Na+ions in the glass, resulting in a series of chemical reactions. Eventually, the silicon oxygen framework in the glass is destroyed and the glass is corroded. Therefore, the Na+concentration in glass directly affects its acid and water resistance properties. The alkaline oxide content of high borosilicate glass is low, calculated as sodium oxide (Na20) content (%): 3.5? 4.5. The alkaline oxide content of ordinary sodium calcium silicate glass, calculated as sodium oxide (Na20) content (%): 13.0? 14.0. From this, it can be seen that the acid resistance and water resistance of high borosilicate special glass are superior to ordinary sodium calcium silicate glass. 3.3.2 Alkali resistance: The erosion of glass by alkali is caused by the destruction of the silicon oxygen skeleton (i.e., a Si-0-Si bond) by OH - ions, resulting in the formation of a Si-O - group and the dissolution of SiO2 in the solution. The degree of glass erosion is not only related to the concentration of OH chestnut, the type of cation, and the duration of erosion, but also to the alkali resistance of glass, which is an important influencing factor. The alkali resistance of glass is related to the strength of various R-O bonds contained in the glass, and high field strength and high coordination cations enhance the alkali resistance of glass. Trivalent boron ion (B3+) is such a high field strength and high coordination cation, so the content of boron oxide (B2O3) in high borosilicate glass improves the alkali resistance of the glass. 3.4 Excellent optical performance high borosilicate 4.0 fire-resistant glass formula with high raw material purity, low iron, ultra white, high transmittance, visible light transmittance of over 91%.It is precisely because high borosilicate 4.0 fire-resistant glass has ultra-high transmittance and transparency that, while maintaining the transparency and aesthetics of buildings, it can still ensure people's visibility for easy evacuation and rescue in the event of a fire. This is something that composite fire-resistant glass and other single piece fire-resistant glass cannot match. Due to the special raw material formula and chemical composition of high borosilicate glass, the density of high borosilicate 4.0 glass is 2.3g/cm3, while the density of ordinary sodium calcium silicate glass is 2.5g/cm3. Therefore, high borosilicate 4.0 glass is over 8% lighter than ordinary glass, and as a building material, it can significantly reduce the weight of buildings. Due to its unique tetrahedral structure of boron oxides, high borosilicate 4.0 glass has ultra-high mechanical strength. 3.6 Processable performance fire-resistant glass is a high-performance single piece fire-resistant glass that can be used alone or processed by cutting, grinding, punching, coating, etc. before tempering; Further processing methods such as coating, hollowing, vacuum, and lamination can also be used to produce more comprehensive building fire-resistant materials. 3.7 No NiS (nickel sulfide) crystallization, eliminating the risk of self explosion. Glass self explosion refers to the phenomenon of tempered glass breaking without direct external force. The cost of replacing glass used in construction after self explosion is relatively high, even higher than the cost of the glass itself, so the standard control of self explosion rate in China's glass industry is less than 0.3%. There are two main reasons for self explosion: glass quality and installation reasons. The main causes of glass quality are nickel sulfide (NiS) impurities and heterogeneous particles in the glass; Visible defects in glass; The high and low stress values on the surface of the glass; Uneven stress in glass. Ordinary sodium calcium silicate tempered glass is prone to self explosion, and the higher the stress, the more prone it is to self explosion. The reason for self explosion is due to unavoidable NiS impurities in the raw material formula and other production process reasons. The formula and production process of high borosilicate glass raw materials achieve nickel free and low sulfur, and the source of sulfur is trace sulfur in raw materials and natural gas. No NiS (nickel sulfide) crystals, eliminating the risk of self explosion. In the production process of high borosilicate glass raw sheets, the melting temperature is high, the glass liquid is clear and more homogeneous, so the flatness of the glass surface is high, the impurities of different phases on the surface are minimal, and the quality of tempered glass is higher than that of ordinary glass. The above are 7 superior physical and chemical properties of high borosilicate 4.0 fire-resistant glass, providing guarantees for its market application.