abrasive Si3N4 Silicon Nitride ceramic knot nut bolt
Reputation depends on quality, quality comes from Hard!
Silicon Nitride Ceramic:
Dry press forming: The presses of dry press forming technology are hydraulic or mechanical. They can be semi-automatic or fully automatic. The maximum pressure of the press is 200Mpa. The output can reach 15~50 pieces per minute due to the hydraulic press stroke pressure. Uniform, so the height of the pressed parts is different when the powder filling is different, and the pressure applied by the mechanical press varies depending on the filling of the powder, which may cause a difference in the dimensional shrinkage after sintering, affecting the quality of the product, and thus the powder particles during the dry pressing process. Uniform distribution is very important for mold filling.
There are three main parameters for determining the rate of sintering densification. The two main parameters of particle size, viscosity, surface grain size and liquid phase paste are mutually compatible. They do not work in isolation, but rather In order to better combine the liquid phase and the solid phase particles, the liquid phase viscosity should not be too high, and the bitterness is too high. It is possible to reduce the viscosity by adding an additive and improve the wetting ability between the solid and liquid phases, but the viscosity is not too low, so as to avoid When the particle diameter is large, the gravity is too large and the gravity flow deformation occurs, that is, the particle should be limited to a certain range, so that the surface tension is greater than the gravity. Therefore, in liquid phase sintering, fine particle raw materials must be used and the particle size of the raw materials must be reasonably distributed.
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↓
Color: Black Grey
Density: ＞3.2g/cm3
Hardness: HRA90
Vickers Hardness (Hv50): ＞1550 HV0.5
Modulus of Elasticity: 290Gpa
Flexural Strength: ＞600Mpa
Compressive Strength: 2500Mpa
Modulus of Elasticity(25°C): 65Gpa
Fracture toughness:＞6.0 Mpam1/2
Maximum Use Temperature: 1200°C
Thermal Conductivity:15-20 W(m.K)
Thermal Expansion Coefficient: ＞3.1 10-6/°C
Thermal Shock Resistance: 500 △T°C
Special Heat Capacity: 700 KJ/kg.K
Dielectric Strength: 1 KV/mm
Dielectric Constant: er
Volume Resistivity(20°C): 1.0*10(12)Ω.cm
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.
Why Choose Us? 1.12 years of professional production industrial ceramics factory 2.High quality products with low price 3.High precision parts with lowest tolerance 4.Short time for production 5.Has a group of experienced, professional and efficient R&D team 6.Has a good reputation in China and abroad. 7.MOQ is not limited, small quantity is welcome.
8.Vigorous team and good after-sales service
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FAQ
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A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
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A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
