Precision ceramics are new ceramic products different from traditional ceramics, also known as functional ceramics, engineering ceramics and technical ceramics. In terms of composition, it can be divided into carbides, nitrides, oxides and borides. In terms of use, it can be divided into structural ceramics, cutting ceramics and functional ceramics, industrial ceramics, etc.
Precision ceramics are made with strict control of ingredients and specific processes without mechanical grinding, and have a smooth and smooth surface and meet the requirements of public service size. Mainly used to make circuit substrates, coil bobbins, tube sockets, high-voltage insulating porcelain, rocket nose cones, etc. High porosity fine casting cores for casting alloys can also be made. It can also be used as a high-temperature material with good seismic resistance.
In recent years, countries around the world are changing from traditional ceramics to new ceramics. Ceramics are not only limited to art, daily life, etc., but are widely used in thermal conduction, thermomechanical, Sensitive sensors, optical fields and new energy fields have become the main points of research in various countries.
New ceramics are far superior to traditional ceramics, existing metal or non-metal materials in high temperature resistance, corrosion resistance, wear resistance, superhardness, and superconductivity. The new ceramics also have photosensitive, gas sensitive, thermal, humidity sensitive, piezoelectric and other functions, which are the basis for making artificial intelligence materials. Therefore, at that time, some countries, especially those with relatively prosperous economy and technology, put the development of new ceramic materials in an important strategic position, and turned a large number of engineering technicians and funds to the research and development of new ceramic materials.
As a precision ceramic, the main difference between it and general ceramics is that the materials of precision ceramics are strictly selected, that is, to obtain high-purity materials that meet the requirements as much as possible, and the particle size of the materials used is as fine as possible, which does not need to be precise. Control its chemical composition to avoid mixing of undesired impurities and the flying or volatilization loss of each component, and then to control the microstructure, pay great attention to the particle size of the sintered particles, the interface of the particles, the pores, etc. Under this series of efforts, the various excellent functions unique to ceramics can be fully reflected.