thermal shock resistant Si3N4 ceramic motor accessories

thermal shock resistant Si3N4 ceramic motor accessories

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Silicon Nitride Ceramic:

By controlling the amount of porogen added and adjusting the particle size of the porogen, the porosity and pore size of the Si3N4 ceramic can be controlled. By adjusting the porogen content, a porous having a high porosity and a low dielectric constant can be prepared. Si3N4 ceramics, the lowest dielectric constant value is 2.4297. As the amount of porogen added increases, the porosity of the sample increases, the α-Si3N4 phase in the sample increases, the free silicon content decreases, and the sample ε' and tan δ The larger the pore size of the pore former, the larger the pore size of the porous Si3N4 sintered body after the reaction sintering, and the ε′ and tan δ of the sample have different amplitudes.
Since Si 3 N 4 is a compound mainly composed of a covalent bond, the bond force is strong and directional, and the formation and migration of structural defects require high energy, and even at high temperatures, the diffusion coefficient is low, which is It is very difficult to make pure Si 3 N 4 dependent on temperature only for densification. For this reason, it is necessary to add some additives to improve the sintering properties. For additives, we should consider the following problems: (1) Additives at high temperature should be The SiO 2 reaction on the surface of the Si 3 N 4 powder forms a liquid phase (attached: Si 3 N 4 "clean" surface is always covered with a layer of SiO 2 , which will seriously affect the sintering) (2) the viscosity of the liquid phase formed, surface The tension should be appropriate.
Silicon nitride composite: high temperature resistant, low dielectric, creep resistant radome silicon nitride film for anti-oxidation high performance missiles: excellent optoelectronic properties, high chemical stability, resistance to impurity diffusion and moisture infiltration High-strength silicon nitride ceramic ball: high hardness, high wear resistance, corrosion resistance, high temperature resistance, light weight, high processing precision, self-lubricating, and insulating properties are the preferred materials for ceramic bearings and hybrid ceramic ball bearings.

properties:

High hardness, high strength, wear resistance, corrosion resistance, high temperature(1200°), good thermal diffusivity, good thermal shock resistance(avoid the temperature changing rapidly), good insulativity, low density. The comprehensive properties are best in most of structure ceramic.

Data Sheet↓

Application industry:

Machinery, electronic, semiconductor, chemical, petroleum, smelt.

Specific application:

Welding shaft, electronic substrate, plunger, nozzle, slide guide, diesel parts, metal molding, shaft wheels etc.

7.MOQ is not limited, small quantity is welcome.

8.Vigorous team and good after-sales service

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