Introduction of silicon nitride plate material
Introduction to silicon nitride plate materials
First, the introduction of silicon nitride plate materials, silicon nitride has high strength. In particular, hot-pressed silicon nitride is one of the hardest substances in the world, can withstand high temperatures, and its strength can be maintained at high temperatures of 1200. After being heated, it will not melt into a melt, and it will decompose to 1900. It has amazing refractory performance, can resist almost all inorganic acids and 30%, and is also a high-performance electrical insulating material-silicon nitride process technology. Atmospheric pressure sintering method (PLS) uses the properties of Si3N4 decomposition temperature rise (usually N2=1atm pressure, starting to decompose from 1800) to increase the pressure of sintering nitrogen atmosphere. 17003354-1800. In addition, this method carries out gas pressure sintering in the temperature range of 18003354-2000, the purpose is to use gas pressure to promote the densification of Si3N4 ceramic structure, thereby improving the strength of ceramics. As a result, the performance of silicon nitride plate material products is slightly lower than that of hot pressing sintering. The disadvantages of this method of silicon nitride plate material are similar to those of hot-press sintering.
2. Silicon nitride ceramic grinding rod hardness: Silicon nitride has high hardness and high chemical stability, and is a very good high-temperature ceramic material. Silicon nitride is atomic crystal 3, pure silicon nitride tube color: 4, silicon nitride protective sleeve strength: the advancement of displacement sensitive indentation technology, the elastic coefficient and hardness value of the material can be determined according to the accurate measurement load 3354 displacement curve data . It provides an appropriate experimental means for studying the relationship between two people. Oliver-Pharr can establish the theoretical relationship between elastic coefficient and hardness through the test method based on elastic contact theory. 5. The structure type of Dalian silicon nitride thermal insulation block: the excellent performance of structural ceramics directly affects the performance and use effect of the product, the specific phase composition and microstructure characteristics of ceramic composition and grain size, aspect ratio, arrangement characteristics, compactness, Grain boundary composition, etc. Such as silicon chloride ceramics. The room temperature and high temperature bending strength, single toughness, hardness, thermal conductivity, thermal shock resistance, oxidation increase and other properties of silicon nitride ceramics increase with the increase of ceramic density. 6. The thermal expansion coefficient of ceramic nozzles, but prepared from -Si3N4 powder Sample D has good thermal shock resistance, and the critical thermal shock temperature difference TC is 600. That is to say, in the nanoscale range, silicon nitride ceramics with thicker particles have thermal shock resistance. Covalent bonding makes silicon nitride have high hardness and melting point. 8. The application and use of reaction synthesis silicon nitride ceramics. Due to its excellent mechanical, chemical, electrical, optical, and thermal properties, silicon nitride can be widely used for its high-strength thermal stability, allowing high-concentration mixing, etc., to prepare electrical/ light instrument. With high strength, thermal shock resistance and high chemical stability, it can be used as a good refractory material. It has the characteristics of high strength and wear resistance, and can be widely used as traditional silicon nitride ceramics such as compression and wear-resistant components. Therefore, brittleness, poor uniformity, poor reliability, poor toughness and strength. In applications, nano-silicon nitride has the characteristics of very small particle size, large specific surface area, and high chemical properties. In addition, it can also make the composition and structure of silicon nitride ceramics uniform, improve the performance of the material, and improve the reliability of use. In addition, because the composition and structure of materials can be adjusted at the nanometer level, the potential performance of silicon nitride ceramic materials can be fully utilized, and the strength, toughness and superplasticity of nano silicon nitride ceramic materials developed by nanotechnology have been greatly improved. It overcomes many shortcomings as engineering ceramics and opens up a new field of application of engineering ceramics. 9. Differences between silicon nitride ceramics and zirconia.