Si3N4 ceramic jet muzzle nipple orifice nozzle
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Silicon Nitride Ceramic:
Silicon nitride has high mechanical strength. Generally, the flexural strength of hot-pressed products is 500-700 MPa, and the high can reach 1000-1200 MPa. The flexural strength after reaction sintering is 200 MPa, and the high can be 300-400 MPa. Although the room temperature strength of the reaction sintered product is not high, the strength does not decrease at a high temperature of 1200 to 1350 °C. The high temperature creep of silicon nitride is small. For example, the reaction-sintered silicon nitride has a load of 24 MPa at 1200 ° C, and its shape becomes 0.5 % after 1000 h. The silicon nitride ceramic has a small friction coefficient. Under the condition of high temperature and high speed, the friction coefficient is also increased by a small amount, so that the normal operation of the mechanism can be ensured. This is a prominent advantage, and the silicon nitride ceramic begins to rub against the grinding friction. The coefficient is 1.0 to 1.5. After precision running-in, the friction coefficient is greatly reduced and kept below 0.5, so the silicon nitride ceramic is considered to be a material having self-lubricity. The main reason for this self-lubricity is different from graphite, boron nitride, talc and the like in the scale structure of the material structure. It is under the action of pressure, the friction surface is slightly decomposed to form a thin film, so that the sliding resistance between the friction surfaces is reduced, and the smoothness of the friction surface is increased. The more friction, the smaller the resistance, the less the amount of wear, and most materials, after constant friction, soften due to surface wear or temperature rise, and the friction coefficient tends to increase gradually.
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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