Heat Resistance Ceramic Glass

Description of Ceramic Glass

Ceramic glass is a polycrystalline solid-phase material containing a vitreous body, which is formed by the controlled nucleation and crystallization of basic glass of a specific composition at a certain temperature. Ceramic Glass Combines the properties of glass and ceramics and is superior to metals and polymers in terms of thermal, chemical, biological, optical and electrical properties. Ceramic glass has concentrated the triple advantages of glass, ceramics and natural stone, and is superior to natural stone and ceramics. It is a new material with development prospect in the 21st century.

Advantages of Ceramic Glass

Ceramic glass is developed from special glass materials, as a new type of ceramic materials, the material is characterized by: good aging resistance, in a certain high temperature environment can be sharply warmed up or cooled down, it has a very low coefficient of thermal expansion and good resistance to thermal shock, can be processed into different sizes, especially suitable for the use of kitchen stoves and the development of the product, the permeability and thermal conductivity of the ability to be strong, high-temperature resistance, good gloss. Feeling delicate with smooth texture, is environmentally friendly, long-term use does not change color, not deformed, easy to clean. Environmentally friendly, long-term use does not change color, not deformed, easy to clean.

Physical properties of Ceramic Glass :

-Thermal expansion is almost zero

-Good temperature stability and durability

-High mechanical stability

-System-optimized infrared transmittance

-Low thermal conductivity

-High thermal shock resistance

Applications of Ceramic Glass

As a new type of material, ceramic glass has the advantages of high temperature resistance, corrosion resistance, high strength, high hardness, high insulation, low dielectric loss, chemical stability, etc. It has a wide range of applications, ranging from household appliances, cooktop,fireplace biomedicine, optics, electronics, machinery and equipment manufacturing, construction, photolithography, metrology, to astronomical applications.

How Ceramic Glass Made

Fusion Method

The preparation of glass ceramics was first used in the fusion method, which is still widely used. This method is a variety of raw materials and additives are mixed, in 1100 ℃ ~ 1550 ℃ high temperature melting, homogenization of the glass melt molding, annealing at a certain temperature after the nucleation and crystallization, in order to obtain a fine grain, uniform and the whole precipitation of the glass ceramics. The most important feature of the fusion method is that it can follow any one of the family - glass molding methods, such as pressing, calendering, blowing, drawing and casting. Compared with the usual ceramic molding process, this method is suitable for the preparation of complex shapes, size precision products, easy to mechanize, automated production, the resulting glass-ceramic products of high densities, uniform composition, no porosity. However, the melting temperature of this method is high, the number of glass-ceramic crystal phase depends on the overall crystallization ability of the base glass and heat treatment system.

Sintering

The traditional fusion method of preparing glass-ceramics has certain limitations, such as high glass melting temperature and long heat treatment time, while the sintering method is able to overcome the above shortcomings. This method is the glass melt water quenching, grinding fine to get the glass powder, sieving and grading of glass powder made of billet, and then sintered at a certain temperature, cooling with the furnace to get the sample. The sintering method is characterized by a lower melting temperature of the base glass than the fusion method and a shorter melting time. As the glass powder has a high specific surface area, than the glass obtained by the fusion method is easier to precipitate the crystal, do not have to use the nucleating agent. In addition, this method of preparation of glass ceramics without the glass formation stage, so suitable for very high temperature melting of glass and difficult to form glass glass ceramics preparation.