Silicon carbide nozzle, due to their unique attributes, have become an essential component in various industries. Silicon carbide (SiC) is a ceramic material that is strong enough to compete with diamond. Steel or brass are the traditional nozzle materials, while SiC nozzles have excellent hardness, wear resistance and thermal shock resistance.
Understanding Silicon Carbide
Silicon carbide is a compound made of silicon and carbon. It has a black color and weighs 40.1 g/mol. Its density varies between 3.0 and 3.2 g/cm3. At 2,730° C (4,946° F), SiC decomposes because it melts at this temperature. Electrical resistivity of SiC ranges from 1 to 4 10x Ω-m while its Poisson’s ratio is from 0.15-0.21; specific heat varies between 670 J/kg-K and 1180 J/kg-K.
Types of Silicon Carbide Nozzles
SiC nozzles are divided into three types depending on their properties and uses.
Recrystallized Silicon Carbide Nozzle
Made from highly purified silicon carbide having a purity of up to 99.5%, they are resistant to high temperatures of up to 1650°C. Their bulk density is typically around 2.7 g/cm3 while flexural strength can be as high as approximately 110 MPa and compressive strength greater than 300 MPa.Thermal expansion for these nozzles is 4.6(1200°C) while thermal conductivity can be within the range of 35~36W/m.K.
Sintered SiC Nozzles
These have a silicon carbide purity ranging from about 98% and can endure high temperatures up to 1550°C although they are heavier with average bulk densities that fall between 3.1g/cm3.They exhibit a flexural strength of 400 MPa and a compressive strength of 2200 MPa.The thermal expansion for these nozzles is4.0(<500°C), while their thermal conductivity is 110 W/m.K.
Reaction Bonded SiC Nozzles
These are made from silicon carbide whose purity exceeds 88% and can be used at temperatures up to 1300°C. Their bulk densities lie beyond 3 g/cm3. The flexural strength of these nozzles is approximately 380 MPa with a compressive strength of 2100 MPa. At the same time, they expand thermally by4.4(<500°C) and have a thermal conductivity of 65W/m.K.
Benefits of Silicon Carbide Nozzle
Compared to conventional nozzles, silicon carbide nozzles offer various advantages:
High Resistance to Extreme Conditions: These nozzles withstand high temperatures and pressures without any problems. Additionally, their low thermal expansion makes them resistant to thermal stress.
Corrosion and Abrasion Resistant: They are known for their corrosion resistant properties.
Long Lifespan: This property ensures that they last longer than ordinary equipment thus making them cheaper in the long run.
Chemical Resistance: They resist most types of chemicals and work well in corrosive environments.
Applications of Silicon Carbide Nozzle
Silicon carbide is extensively used in high-performance nozzles applications. These are available in different shapes, sizes and can also be tailored depending on the needs of the users to fit into various machinery types.
Slide Bearings: These are used in slide bearings because they exhibit great strength as well as wear resistance.
Sealing Rings: This is due to its very low coefficient of thermal expansion and its hardness exceeding those of other materials used in similar applications such as ceramics or metals.
Wear Parts: Silicon Carbide Nozzle have excellent wear resistance and can be used as wear parts.
Sintering Aids: The sintering aids are composed of silicon carbide and have high thermal conductivity.
Crucibles: SiC nozzles are used in crucibles because they can stand extreme heat temperatures.
Semiconductor Applications: Silicon carbide nozzles are used in semiconductor applications due to their electrical conductivity.
Heating Elements: SiC nozzles are used in heating elements due to their high thermal conductivity.
Burner Nozzles: In addition, silicon carbide nozzles are used in burner nozzles because they have a pressure and temperature tolerant quality.
Heat Exchangers: These attributes make SiC nozzles applicable for use in heat exchangers which require high thermal conductivities and low thermal expansions.
Packaging
All Silicon Carbide Nozzle should be handled with care during storage and transportation to minimize any possible damage or deterioration that may affect the quality of our products.
In conclusion, silicon carbide nozzles should be chosen for high-performance, durable and resilient nozzles suitable for extreme conditions with reliable operations.