Silicon Nitride Board Material Introduction

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Brief Introduction of Silicon Nitride Board Materials

First of all, the silicon nitride board material is introduced, and the strength of silicon nitride is very high. In particular, hot-pressed silicon nitride is one of the hard substances in the world, can withstand high temperatures, and the strength can be maintained to 1200 high temperatures. After being heated, it will not melt into a molten body and decompose to 1900. It has amazing refractory academic performance, can resist almost all inorganic acids and 30%, and is also a high-performance electrical insulation material-silicon nitride process technology. In the normal pressure sintering method (PLS), the pressure of the sintering nitrogen atmosphere is increased by utilizing the property that the decomposition temperature of Si3N4 is increased (usually N2 = 1atm pressure, decomposition starts from 1800 atm). 17003354-1800. In addition, the method carries out gas pressure sintering in the temperature range of 18003354-2000, and the purpose is to use gas pressure to promote the densification of the Si3N4 ceramic structure, thereby improving the strength of the ceramic. Results The performance of the silicon nitride plate material product was slightly lower than that of the hot pressing sintering. The disadvantages of this method of silicon nitride plate material are similar to hot press sintering.

2. silicon nitride ceramic grinding rod hardness: silicon nitride has high hardness and high chemical stability. It 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 progress of displacement sensitive indentation technology, the elastic coefficient and hardness value of the material can be determined according to the accurate measured load 3354 displacement curve data. It provides an appropriate experimental means for studying the relationship between the two people. Oliver-Pharr, the theoretical relationship between elastic coefficient and hardness can be established by the test method based on elastic contact theory. 5, Dalian silicon nitride insulation block structure type: 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, density, grain boundary composition, etc. For example 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, ceramic nozzle thermal expansion coefficient, but from-Si3N4 powder to prepare sample D thermal shock resistance is good, the critical thermal vibration temperature difference TC is 600. That is to say, in the nanometer scale range, silicon nitride ceramics with thicker particles have thermal shock resistance7, Shandong nitride protection band melting point and boiling point, that is, silicon nitride is a covalent compound, so it is combined with strong covalent bonds between atoms., So that silicon nitride has high hardness and melting point 8, the application and use of reaction synthesis silicon nitride ceramics. Because of its excellent mechanical, chemical, electrical, optical and thermal properties, silicon nitride can be widely used in the high strength thermal stability of silicon nitride, allowing high concentration mixing and other characteristics, the preparation of high temperature, high radiation environment work electrical/optical instruments. It has high strength, thermal shock resistance and high chemical stability, and 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, the composition structure of the silicon nitride ceramic can be made uniform, the performance of the material can be improved, and the reliability of use can be improved. In addition, because the composition and structure of the material can be adjusted at the nanometer level, and the potential properties of silicon nitride ceramic materials can be fully utilized, the strength, toughness and superplasticity of the nano-silicon nitride ceramic materials developed by nanotechnology have been greatly improved, which overcomes many shortcomings as engineering ceramics and opens up new areas of engineering ceramics application. 9. The differences between silicon nitride ceramics and zirconia.