Print reference release time: 2012-08-14
Foam glass
Chinese name: Foam glass English name: foam glass Definition: made of cullet, foaming agent, modified additive and foaming accelerator, after fine pulverization and uniform mixing, then high temperature melting, foaming, annealing Inorganic non-metallic glass materials. It has excellent heat insulation (cooling), sound absorption, moisture resistance, fire prevention, light weight and high strength. Applied science: Materials Science and Technology (a subject); inorganic non-metallic materials (two subjects); glass (three subjects)
Foam glass
In the 1930s, Saint-Gobain of France first developed foam glass with calcium carbonate as a foaming agent. In 1935, it applied for the first patent. Subsequently, in 1939, the Soviet Union experimentally produced foam glass at the intermediate pilot plant of the Mendeleev Institute of Chemical Technology.
Foam glass was first invented by Pittsburgh Corning Company of the United States. It is made of cullet foaming agent, modified additive and foaming accelerator. After fine pulverization and uniform mixing, it is then melted at high temperature, foamed and annealed. Made of inorganic non-metallic glass material. It consists of a large number of uniform bubble structures with a diameter of 1 to 2 mm. The sound absorbing foam glass is more than 50% open cell bubbles, and the heat insulating foam glass is more than 75% closed cell air bubbles, and the product density is 160-220 kg/m3, which can be adjusted according to the requirements of use, through changes in production technical parameters. .
Because this new material has the functions of moisture proof, fireproof and anti-corrosion, and the glass material has the advantages of long-term use performance, it is in a harsh environment such as heat insulation, deep cooling, underground, open air, flammable, damp and chemical attack. It is favored by users. It is widely used in wall insulation, petroleum, chemical industry, machine room noise reduction, highway sound absorption barrier, electric power, military products, etc., and is called green environmental protection insulation material by users.
Depending on the properties of the foam glass, it can be used as insulation material in various sectors of construction engineering, as well as in shipbuilding, chemical, cryogenic and high temperature technologies. White and stained glass are also used as sound absorbing and decorative materials. Waste in production – foamed glass powder and scrap can also be used as fillers for decorative light concrete and other applications. Depending on the application, foam glass products produced by the corresponding processes can be divided into four categories, namely, insulating foam glass, sound absorbing decorative foam glass, facing foam glass and granular foam glass.
performance
Foam glass is a kind of lightweight high-strength building materials and decorative materials with excellent performance (insulation), sound absorption, moisture proof and fireproof. The temperature range is from 196 degrees to 450 degrees. Class A is non-combustible and has the same life as the building. The coefficient is 0.058 and the moisture permeability coefficient is almost zero. Although other new insulation materials emerge in an endless stream, foam glass is playing an increasingly important role in its fields of permanentness, safety, high reliability, low thermal insulation, moisture-proof engineering, and sound absorption. Its production is the recycling of waste solid materials, which is an example of protecting the environment and obtaining substantial economic benefits.
Lava foam glass: using natural lava or industrial waste slag such as perlite and obsidian as the basic raw material, or adding a certain amount of glass powder to reduce the foaming temperature, foam glass made of mirabilite or the like as a foaming agent. Generally used as insulation materials and wall materials for construction and industrial equipment.
Application field
Foam glass is a porous inorganic non-metallic material which is made of waste flat glass and bottle glass and is formed by high temperature foaming. It is fireproof, waterproof, non-toxic, corrosion-resistant, anti-mite, non-aging, non-radioactive and insulating. Anti-magnetic wave, anti-static, high mechanical strength, good adhesion to various types of mud. It is a stable building exterior wall and roof insulation, sound insulation and waterproof material.
According to reports, foam glass can also be used in the heat preservation project of flue, kiln and cold storage, heat insulation, waterproof and fireproof engineering of various gas, liquid and oil transmission pipelines, subway, library, office building, opera house, cinema, etc. Various places that require sound insulation and heat insulation equipment, isolation and sound insulation engineering for infrastructure construction, leak prevention and flood control works for river canals, guardrails, dams, etc. It even has functions for home cleaning and health care. The use of foam glass to protect the heating duct reduces heat loss by approximately 25% compared to conventional protective materials.
Foam glass is a kind of lightweight high-strength building materials and decorative materials with excellent performance (cooling), sound absorption, moisture proof and fireproof. It is also called porous glass. Its interior is filled with numerous open or closed small pores. The total volume is 80%~90%, the pore size is 0.5~5mm, and some are as small as a few microns. The main raw material of foam glass is usually cullet, acidic volcanic lava materials such as volcanic ash, pumice, perlite, obsidian, blast furnace slag, etc.
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