Development of precision ceramics
In recent years, the world is changing from traditional ceramics to new ceramics, ceramics has not only limited to art, daily and other fields, because of its good heat resistance, biocompatibility and other properties, is widely used and heat conduction, thermal machinery, sensitive sensors, optical field, medical field and new energy and other fields, has become the focus of current national research.
Precision ceramic processing series
New ceramics in high temperature resistance, corrosion resistance, wear resistance, ultra-hard, ultra-soft, superconductivity, far superior to traditional ceramics, existing metal or non-metallic materials. The new ceramics also have photosensitive, gas-sensitive thermal, humidity-sensitive piezoelectric and other properties, which are the basis for manufacturing artificial intelligence materials. Therefore, at present, some countries, especially economically and technologically developed countries, have put the development of new ceramic materials in an important strategic position, and have turned a large number of engineering and technical personnel and funds to the research and development of new ceramic materials. Precision ceramics, also known as high-performance ceramics, engineering ceramics and so on. As far as the main components are concerned, they can be divided into carbides, nitrides, oxides and borides. At present, the most important research and development objects are Si3N4 and SiCr in terms of use, which can be divided into structural ceramics, cutting ceramics and functional ceramics (mainly using their electrical and magnetic properties). Common ceramics have been widely used in building materials and light industry. However, as a precision ceramic, the main difference between it and ordinary ceramics is that the raw materials of precision ceramics are strictly selected to maximize the high purity of the raw materials that meet the requirements, and the particle size of the materials used is as fine as possible. Secondly, it is necessary to accurately control its chemical composition, avoid mixing unwanted impurities and the flying or volatilization loss of each component, and then control the formation of a fine structure, the particle size of the sintered particles, and the interface of the particles. Stomata and so on should be very careful. In this series of efforts, the unique qualities of ceramics are fully reflected. With the development of modern industrial technology, the requirements for material properties have exceeded those of metal materials or plastics.
