Information and classification of single piece fireproof glass   :

Due to the poor weather resistance of grouted composite fireproof glass, many large foreign glass groups, such as Japan AGC, Germany SCHOTT, and France Saint-Gobain, are actively researching single-piece fireproof glass. This kind of fireproof glass has good weather resistance, never fades, and does not devitrify, fully reflecting the crystal clear and transparent characteristics of the glass. For example, SCHOTT's single-piece fire-resistant glass PYRAN has been used for indoor partitions in the UK's Sheffield Stadium stands, Manchester Airport, London Tobacco, Hong Kong and HSBC. The single-piece fireproof glass of Saint-Gobain of France has been used in projects such as the Shanghai Grand Theatre.

Single piece special fireproof glass. Special single-piece fireproof glass refers to the glass used as the special component of the glass substrate, rather than the glass of ordinary flat glass. It mainly includes borosilicate fireproof glass, aluminosilicate fireproof glass, microcrystalline fireproof glass and high quality float glass with softening temperature above 800 °C. The common main features are: glass softening point is higher, generally above 800 °C, low thermal expansion coefficient, generally does not burst or deform due to high temperature under strong flame, especially microcrystalline fireproof glass, in addition to the above characteristics It also has high mechanical strength, flexural strength, high compressive strength and good chemical stability and physical and mechanical properties. It also has the advantages of high softening temperature and low thermal expansion coefficient. It is used as fireproof glass and can be used as the best quality, but the fireproof glass of special materials (boron, aluminosilicate fireproof glass, microcrystalline fireproof glass) has high production cost. The market price is high, and people are more difficult to accept. Therefore, the market is still dominated by transparent composite laminated fire-resistant glass and high-strength single-piece fireproof glass.

Special single-piece fireproof glass has the following

A, borosilicate fireproof glass

The chemical composition of the borosilicate fireproof glass is between 70% and 80%, the B2O3 content is 8% to 13%, the Al2O3 content is 2% to 4%, and the R2O content is 4% to 10%. This glass is characterized by a high softening point temperature, a low coefficient of thermal expansion and stable chemical properties. The softening point is about 850 ° C, and the thermal expansion coefficient is (3 to 40) × 10 -7 / ° C at 0 to 300 ° C.

B, aluminosilicate glass

The chemical composition of aluminosilicate glass: SiO2 content is between 55% and 60%, B2O3 content is 5% to 8%, Al2O3 content is 18% to 25%, R2O content is 0.5% to 1.0%, and CaO is 4.5% to 8.0. %, MgO 6% to 9%.

This kind of glass is characterized by high Al2O3 content, low alkali content, high softening point temperature, and generally does not burst or deform when heated directly on the flame. The softening point is between 900 and 920 ° C, and the coefficient of thermal expansion is (5 to 7) × 10 -6 / ° C.

C, transparent microcrystalline fireproof glass

Microcrystalline fireproof glass is a polycrystal formed by adding a crystal nucleating agent such as Li2O, TiO2, ZrO2 or the like to a certain chemical composition of the glass, and then heat-treating the glass to precipitate and uniformly grow the crystallites.

The characteristics of this kind of glass: good chemical stability and physical and mechanical properties, high mechanical strength, high flexural and compressive strength, high softening temperature and small thermal expansion coefficient.

Single piece float fireproof glass. According to the data, the Japanese plate glass has introduced a float fire glass composed of sodium calcium with a softening point higher than 780 ° C, which has attracted the attention of glass merchants. Its introduction is as follows:

Nippon Sheet Glass has introduced a class of fireproof glass that can be used for industrial production by float method, which is characterized by a softening point higher than 780 ° C and difficult to soften. This type of glass belongs to soda lime glass.

Ordinary soda-calcium flat glass is not fireproof, and it is often subjected to comprehensive reinforcement treatment. It has high flexural strength and is made into high-strength glass, which can be used as fireproof glass. Although the borosilicate glass has a high softening temperature, it is difficult to industrialize a large-scale flat plate due to a high melting temperature and a high viscosity, and the boron-containing glass significantly reduces the furnace age. The patent's fire-resistant glass based on soda lime glass is suitable for float production. Although ordinary fireproof glass can block the spread of fire in the early stage of fire, it is softened and deformed by high temperature in the later stage. According to the relevant regulations of the Japanese government: the standard of Class A fire doors is 770 ~ 780 ° C can withstand 60 min, the glass does not fall off the door frame due to softening. The patented flat glass has a softening temperature higher than 780 ° C and is difficult to soften to meet this requirement. The patented glass is suitable for large-scale float production, and the glass can meet the requirements of Class A fire doors.

High strength single piece fire resistant glass. The high-strength single-piece fireproof glass is formed by comprehensively strengthening the flat glass. This product can be used not only as a single piece, but also as laminated glass, insulating glass, coated glass, and the like. It combines the functions of tempered glass and grouted composite fireproof glass. As the glass for building curtain wall, the high-strength single-piece fireproof glass not only has the same light transmittance as the float glass of the same thickness, but also has the same specific gravity as the float glass of the same thickness, so the high-strength single-piece fireproof glass replaces the same The thickness of tempered glass does not affect the safety of the glass curtain wall construction structure, and the strength is higher and it is not easy to be broken.

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