Silicon carbide sealing ring (reaction and pressureless sintering) 

 Silicon carbide is an inorganic non-metallic materials with high hardness, high wear resistance, low coefficient of friction, oxidation resistance, thermal stability, low coefficient of thermal expansion, thermal conductivity and thermal shock resistance and resistance to chemical corrosion excellent characteristics can be used for the various requirements of wear and corrosion resistance and high temperature mechanical equipment. After years of unremitting efforts, the engineering and technical personnel, greatly improving the performance of silicon carbide. Now, silicon carbide has become an important engineering material. Widely used in machinery, metallurgy, petrochemicals, shipbuilding, military equipment and other fields, such as mechanical seal friction pair, sliding bearings, nozzles, cutting tools and so on. 
 My company production of silicon carbide products have the following four grades: 
 1, DX101 reaction bonded silicon carbide 
 DX101 to suppress by the fine particles of α-SiC and additives into biscuit contact with liquid silicon at high temperatures, the carbon in the green body infiltration of Si reaction to generate the β-SiC and α-SiC and free silicon filled pores, resulting in a high density ceramic materials. It can be used in moderate concentrations of acid or alkaline medium. 
 2, the DX102 contains free graphite reaction bonded silicon carbide 
 To improve the mechanical properties of silicon carbide ceramic seal ring, developed on the basis of my company in the the DX101 reaction bonded silicon carbide, the DX102 containing free graphite reaction-sintered SiC. Contain a certain amount of small graphite particles in the ceramic matrix, so its addition to the performance of the the DX101 reaction sintering of silicon carbide, with a high performance self-lubricating, low friction coefficient, suitable for use in dry friction conditions. 
 3, the DX201 pressure sintered silicon carbide 
 The DX201 is a new generation of engineering ceramics, to suppress the selection of high-purity α-SiC powder and additives into the biscuit, no pressure around the junction process, high purity, high-density sintered at high temperatures, does not contain free silicon, SiC ceramics no pressure sintered SiC hardness, strength, corrosion resistance, high temperature resistance, impact resistance and other properties than those in other engineering ceramics such as alumina, reaction bonded silicon carbide, and other fine can be applied to strong corrosion, high speed, high resistance grinding, and other working conditions, but also an ideal material for production of bulletproof plates, nozzles. 
 4, DX202 containing free graphite, non-pressure burning silicon carbide 
 DX202 is added on the basis of the DX201 sintered graphite particles, compared with the DX201, that is, without reducing the the DX201 corrosion resistance, improve self-lubricity and load carrying capacity, suitable for strong corrosion, high load, dry conditions of friction, hard - hard paired (mechanical seal friction pair). 

 Ceramic seal ring 

 Product characteristics: high surface hardness, wear resistance, corrosion resistance 

 Technical parameters highest use temperature of 1600 ° C surface roughness ≤ 0.1um, flatness ≤ 0.5um, dimensional tolerances ≤ ± 0.1mm. 

 Applications: a variety of pumps and motor mechanical static and dynamic contact area sealed 

 Ring [bearing] seal 

 Definition: 

 By one or several parts of the ring cover, fixed on a bearing ring or washer and another ring or gasket contact or the formation of narrow gaps of the labyrinth to prevent lubricant leakage and intrusion of foreign objects. 

 Applied sciences: 

 Mechanical engineering (a discipline); mechanical parts (two subjects); bearing (three subjects) 

 Alumina ceramic seals, gaskets 

 Material: ceramic, cross-sectional shape: O-type role: shaft seal, the scope of application: electrical appliances, bearings, properties: corrosion-resistant, high temperature resistance, wear resistance, thickness: 3 (mm) internal diameter: 50 (mm) outside diameter No: 90 (mm), sample or spot: the sample, whether the standard: nonstandard parts, whether imported:. 
 Features self-lubricating, wear-resistant sealing, easy assembly, long life, loss, impact resistance, fracture toughness and good properties.