Microcrystalline Glass Overview
Now, let's do a comparison experiment between microcrystalline glass and natural stone. We pour the ink on the marble and microcrystalline glass respectively, wait a moment, the ink on the microcrystalline glass can be easily wiped off, while the ink on the marble stays. This is why? Marble, granite and other natural stone surface roughness, can hide dirt, microcrystalline glass does not have this problem. As we all know, the main component of marble is calcium carbonate, made of it into buildings, it is easy to chemical reaction with water and carbon dioxide in the air, which is the reason for the discoloration of marble buildings over time, while the microcrystalline glass almost does not react with the air, so it can last for a long time.
Experts said that the breakthrough point of this invention is mainly two, respectively, the ratio of raw materials and the design of the process. Among them, the design of the process is the key to technology. Placement of microcrystalline glass first of all, the proportion of raw materials, put into the kiln firing melt, and so all melted, the melt poured on the cold iron plate, which is called quenching, quenching, the raw material has become a crystal glass, this step is the sintering process. Now, we mash the glass, put it into the mold, smoothen it, and put it into the kiln again, this time calcination makes its atomic arrangement regular, which is the process from ordinary glass to microcrystalline glass.
The general waste slag soil contains most of the ingredients for making microcrystalline glass. We use computer testing to determine the chemical composition of the existing raw materials and add the missing parts, which greatly reduces the cost. Microcrystalline glass uses waste slag and waste soil as raw materials, which is conducive to environmental management and can be turned into a treasure, in parallel with environmental protection work everywhere.
Low expansion coefficient of microcrystalline glass can be used for laser navigation gyro, optical telescopes and other important areas of science and technology, China's production of laser navigation gyro used microcrystalline glass basically depends on imports, recently, Xiamen Aviation Industry Co., Ltd. said it has developed a microcrystalline glass can be applied to laser navigation gyro, the quality can be comparable to imported glass such as Germany.
Microcrystalline glass concentrates the triple advantages of glass, ceramics and natural stone, better than natural stone and ceramics, can be used for architectural curtain walls and indoor high-grade decoration, but also mechanical structural materials, electronics, electrical insulation materials, large-scale integrated circuit backplane materials, microwave oven heat-resistant column vessels, chemical and anti-corrosion materials and mining wear-resistant materials, etc.. It is a new material of the 21st century with a promising development.
Microcrystalline glass for construction are used sintering method, and do not add crystal nucleating agent. Its basic principle is that glass is an amorphous solid, from the thermodynamic point of view, it is in a sub-stable state, compared to the crystal has a higher internal energy, so under certain conditions, can be transformed into a crystalline state. From the kinetic point of view, the viscosity of the glass melt increases sharply during the cooling process, which inhibits the formation of nuclei and crystal growth and prevents the growth and expansion of crystals. Microcrystalline glass for construction makes use of the mechanism of non-homogeneous crystallization without nucleating agent, and fully applies the thermodynamic possibility and kinetic inhibition to make this complementary physical process under certain conditions to form a new equilibrium, and a new material obtained.