Silicon Nitride

Silicon Nitride is a kind of advanced ceramic material with high hardness, stable structure, small thermal expansion coefficient, excellent oxidation resistance and corrosion resistance, which integrates excellent thermal and chemical properties. Main purpose: It is mainly used in metallurgical industry, mechanical industry, chemical industry, semiconductor, aviation, atomic energy and other industries, medical artificial joints, and all-ceramic engines. Items Nano-Si3N4 phase content (%) amorphous chemical component N(wt%) 38.5 38.5 38.5 O(wt%) 1.25 1.25 1.25 C(wt%) 0.2 0.2 0.2 Fe(ppm)

Product name:silicon nitride Place of origin:hebei, china Brand name:ledphor Molecular formula:si3n4 Cas no.:12033-89-5 Purity:99.9% Appearance:white powder Particle size:d50

Granule 1-4mm 99.9%

In order to remove hydrogen in the aluminum liquid, the Silicon Nitride Ceramic hollow degassing rotor is used to feed nitrogen or argon, and the gas is dispersed by high-speed rotation,finally achieve the effect of neutralizing and discharging hydrogen. ï?¬Compared with graphite rotor, Silicon Nitride Ceramic will not be oxidized under high temperature environment, so it will not pollute the aluminum liquid, and the service life is much longer; ï?¬The property of high thermal shock resistance ensures that the degassing rotor will not break during frequent intermittent operation; Because Silicon Nitride Ceramic is of high density and high strength, it assures that degassing rotor can be reliable and stable in high speed rotation.

MF: Si3N4 Chemical Name: Silicon Nitride Powder Purity: > 99.99% APS: 40-50 µm (Size Customization possible) Form Micro powder CAS Number 12033-89-4

Silicon Nitride (Si3N4) has good high temperature strength, creep resistance and oxidation resistance. In addition, its low thermal expansion coefficient gives good thermal shock resistance compared with most ceramic materials. Silicon nitride is produced in two main ways; Reaction bonded silicon nitride (RBSN), and hot pressed silicon nitride (HPSN) and sintered silicon nitride (SSN). RBSN is made by direct reacting compacted silicon powder with nitrogen, and produces a relatively low-density product compared with hot pressed and sintered silicon nitride, however the process has only a small volume change allowing net shape forming. The HPSN and SSN material is made with sintering aids and offers better physical properties suitable for more demanding applications. Typical Silicon Nitride applications include: Bearing balls and rollers Cutting tools Valves, turbocharger rotors for engines Turbine blades Glow plugs Molten metal handling Thermocouple sheaths Welding jigs and fixtures Welding nozzles Advantages 1.High hardness 2.Wear resistance 3.High fire resistance 4.Corrosion preventive 5.Good chemical stability

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boron nitride ceramics The boron nitride crystal belongs to the hexagonal crystal system, which is similar to graphite in structure and performance, so it is also called "white graphite". It has good heat resistance, thermal stability, thermal conductivity, high temperature dielectric strength, and is an ideal heat dissipation material and high temperature insulation material. Boron nitride has good chemical stability and can resist the erosion of most molten metals. It also has good self-lubrication. Boron nitride products have low hardness and can be machined with an accuracy of 1/100 mm. Boron nitride can be used to make crucibles for smelting semiconductors and high-temperature vessels for metallurgy, semiconductor heat dissipation insulation parts, high-temperature bearings, thermowells and glass forming molds.