Fire-resistant glass technology systems - fire glass fire characteristics and application status 2

Then the last content borosilicate glass has good chemical stability, higher softening point (about 850 ℃), low thermal expansion coefficient, can be used as heat-resistant and fire-resistant glass, the use of this glass as a fire Usually glass thickness of 6mm-8mm is appropriate for use in some foreign developed countries more widely. But borosilicate glass fire due to the high melting temperature, forming temperature is high, when melting volatile boron, divided equally easy to produce borosilicate furnace refractory erosion problems and technical difficulties such as speed, technology threshold and the cost is very high.

In addition to the fire borosilicate glass, special glass fire also include fire aluminosilicate glass, ceramics and fire-resistant glass softening temperature higher than 800 ℃ soda lime material quality float glass. Their common characteristics: high glass softening point, generally at above 80 ℃, low thermal expansion coefficient, generally not in a strong flame burst or deformation due to high temperature, fire-resistant glass-ceramic in particular, in addition to having the above characteristics, but also high mechanical strength, bending, high compressive strength and good chemical stability and physical and mechanical properties. But specialty materials fire-resistant glass (boron, aluminum silicate fire-resistant glass, fire-resistant glass-ceramic) higher prices, the market is difficult to accept, China's monolithic fire glass plate glass technology uses basic physical or chemical enhancement technology to improve glass the strength of the glass can withstand the stress generated by rapid heating (or quenching), the function of which has a fire.

Fire-resistant mechanism of high intensity fire monolithic glass is soda-lime-silica glass by increasing the strength to compete with the thermal stress and thus avoid cracking the glass surface micro crack caused. Fire glass thermal expansion of the whole glass bending deformation, glass surface fire by microcracks subject to thermal stress, resulting in gradual expansion of broken glass; fire monolithic glass high intensity, there is a greater than normal prestressed glass, to improve the thermal stress properties of the glass, when the glass thermal expansion, which will offset the high prestressing surface thermal stress generated, so no micro-cracks caused by expansion of glass breakage, thus ensuring the fire resistance under high temperature or flame impingement. When subjected to heat greater than the overall glass unexposed surface heat loss, the overall glass temperature gradually increased, the height direction from the surface viscosity by the fire began to soften into the area until the glass is insufficient to support the unexposed surface of the glass itself when the weight of the glass as a whole (or partial) collapse and loss of integrity.

Although compared with the traditional fire-resistant glass (such as filling, composite fire-resistant glass), fire monolithic glass has its incomparable superiority, but in case of fire, due to the non-insulated monolithic fire-resistant glass, the thermal radiation of the fire at the same partition outside flammable, combustible and human security through an impact, how to make fire monolithic glass with transparent appearance, to ensure good insulation fire resistance have become the focus of attention of designers. Studies have shown that by applying a system of automatic sprinkler protection Fireproof Fireproof glass partition glass insulation can solve the problem. By setting automatic fire sprinkler system in the position of the upper edge of the glass partition, when the fire broke out after the glass fire back surface air temperature reaches operating temperature spray nozzle back surface fire sprinkler system startup, glass fire back surface to form a continuous water curtain , taking the heat transfer due to leaving the heat absorbed by the glass, fire-resistant glass so that even at a very high fire load can maintain a lower temperature. Relevant tests showed that the automatic sprinkler protection, thermal insulation monolithic fire-resistant glass system has been significantly improved, the heat radiation is effectively blocked, glass refractory time is greatly extended, and fire back surface temperature below 40 ℃, can completely replace Fireproof Shutter.

When the fire-resistant glass frame systems no insulation requirements, the choice of class C fire-resistant glass. When the fire-resistant glass frame insulation system requirements, the choice of Class A or Class C fire-resistant glass fire-resistant glass water sprinkler protection.