Glass is an ancient building material. With the rapid improvement of modern science and technology and the rapid development of applied technology, various glasses with unique functions have come out one after another, which has prospered the glass family. Unbreakable Glass A British aircraft manufacturing company invented an indestructible glass for aircraft, which is a kind of multi-layer glass, and the chips are bonded into a transparent plastic film. This PVC-based plastic film has a thick semi-liquid consistency. When someone tries to break it, the hit PVC film will slowly gather together and restore its unique integrity. This kind of glass can be used in cars to prevent cars from being stolen. Nailable glass This kind of glass was successfully developed by Mitsubishi Electronic Instrument Laboratory in Japan, and it was made of boric acid glass powder and carbonized fiber by mixing and heating to 1000 degrees Celsius. It is made of cemented carbide reinforced glass, and its maximum fracture stress is more than twice that of ordinary glass. There are no fragile weaknesses, nails and wooden screws, and you don't have to worry about breaking them. Non-reflective glass is a kind of non-reflective glass developed by Short Glass Company in Germany, and its light reflectivity is only within 1% (8% for ordinary glass), thus solving the problems of glass reflection and glare headache. Anti-theft glass, developed by a Hungarian research institute, has a multi-layer structure with extremely thin metal wires embedded in the middle of each layer. In case the thief breaks the glass, the alarm system connected with the metal wire will send out an alarm signal immediately. A Japanese sound insulation glass company imported technology from Germany and manufactured a new type of sound insulation glass. This kind of glass is made of soft resin with a thickness of 5 mm, which can almost absorb the noise during the meeting, and is especially suitable for recording and broadcasting studios. Its price is five times that of ordinary glass. Air-conditioning glass is a kind of double-layer glass, which can send heat to the glass interlayer and radiate it indoors through air holes, rather than through the radiator. This is energy-saving, convenient, sound-proof and dust-proof. You can change it to air conditioning in summer. Vacuum glass, a vacuum glass developed by Japan Flat Glass Company, has a vacuum layer of1100 atmospheric pressure with a spacing of 0.2 mm between two pieces of glass with a thickness of 3 mm, which is supported by a small metal cylinder to prevent the external atmospheric pressure from sticking the two pieces of glass together. This kind of vacuum glass is only 6.2 mm thick and can be directly installed on ordinary window frames. It has good heat and sound insulation effect and is suitable for windows of residential buildings and high-rise buildings. The transparency of this kind of glass developed in smart glass and the United States can change with the viewing angle. It has a special polymer film, and its astigmatism, thickness, area and form can be freely selected by the manufacturer, which can play a certain role in protection and shielding. Holographic glass The holographic diffractive glass developed by a research group in Boston, USA, can concentrate some colors of light in selected directions. With this glass window, natural light can be decomposed into spectral combination colors, and light can be emitted to the ceiling and then reflected to all corners of the room. Even in a room without windows, sunlight can be "obtained" from the reflecting wall through the ventilation pipe, and then the light can spread to the ceiling through the small holes. Tempered Glass A British company has successfully developed a thermochromic tempered glass called Jiao Yun, which is a kind of synthetic glass with plastic films on both sides and a polymer aqueous solvent in the middle. It is transparent in low temperature environment, absorbs the heat energy of sunlight, and becomes opaque white clouds when the ambient temperature rises, blocking the heat energy of sunlight, thus effectively regulating the indoor temperature. Bioglass The University of Florida has developed a new type of bioglass with biological activity and active tissue combination. The bioglass has biological adaptability and can be used for artificial bone and artificial gum. Antenna Glass A Japanese company has successfully developed a TV antenna window glass. The inner layer of this glass is embedded with a very thin antenna. After installation, the indoor TV can present a clearer picture. Tissue glass German scientists have created an ultra-thin glass, which can be used in optoelectronics, biosensors, computer display screens and other modern technical fields. Its thickness is only 0.003 mm ... Information glass The University of Tokushima in Japan invented a glass that can record information. When it records information, the laser is focused on a certain point inside the glass with an optical microscope, and the irradiation is completed within 30 picoseconds, leaving a recording spot. When reading information, the laser scans the light spot. This kind of recording information can be carried out at room temperature, and its performance is higher than that of the currently used optical disc. Foam glass Bulgarian building materials experts have successfully developed a kind of foam glass, which has good biological stability, non-decay, poor hygroscopicity, easy processing and easy adhesion with other building materials. This new type of foam glass is successfully made by adding various mineral components to liquid glass. Self-cleaning glass The University of Tokyo in Japan invented a titanium dioxide coated glass, which can prevent dirt and water stains from accumulating on the surface, achieve the effects of automatic cleaning and shock prevention, and can clean the glass window effortlessly. Contaminated glass The California Air Pollution Observation Laboratory has developed a kind of contaminated glass which can detect pollution. This kind of glass will change color when it is polluted by polluted gas, such as green when it is polluted by acidic gas and yellow-gray when it is polluted by amine-containing gas. It will be widely used to make pollution detection materials and label materials. Carbon dioxide exhausting glass Osaka Institute of Industrial Technology of Japan University of Technology has developed a carbon dioxide permeable glass film, which can be applied to the glass window of the living room to exhaust the indoor carbon dioxide gas to the outside. It permeates different amounts of carbon dioxide at different humidity, and the higher the humidity, the higher the permeability.