Silicon nitride cylindrical nozzle pipe belongs to a kind of fine ceramics, silicon nitride has good chemical stability, in addition to not resistant to hydrofluoric acid and concentrated NaOH erosion, can resist all inorganic acids and some alkali solutions, molten alkali and salt corrosion of silicon nitride normal casting temperature is stable for many metals, not infiltrated or corroded silicon nitride oxidation resistance is good.
Advantages of silicon nitride cylindrical nozzle :
Heat resistance: Silicon nitride ceramic cone tube and high temperature resistant ceramic sandblasting nozzle have excellent heat resistance, can maintain stable physical and chemical properties at extreme high temperatures, suitable for high temperature furnace, melting equipment, sandblasting equipment and other scenarios.
Corrosion resistance: These precision ceramic products have excellent corrosion resistance and can be used stably in harsh environments such as acid and alkali solutions and corrosive gases for a long time, such as corrosive media treatment equipment and chemical experimental equipment.
Precision machining: Silicon nitride ceramic cone tube and high temperature resistant ceramic blast nozzle can be precision machined to meet customer specific size, shape, aperture and other needs to ensure the accuracy and stability of the equipment, such as the nozzle accuracy and uniformity of the blast nozzle.
Wear resistance: These precision ceramic products have excellent wear resistance and are stable under the impact of high-speed fluids or particles, making them suitable for applications such as sandblasting equipment and abrasive conveying systems.
silicon nitride cylindrical nozzle performance indicators :
Performance | Ⅰ | Ⅱ | Ⅲ | ||
Density/(g/cm³) | 3.15≤ρ≤3.25 | ||||
Elastic modulus/GPa | 270≤E≤330 | ||||
Poisson's ratio | 0.23≤μ≤0.29 | ||||
Coefficient of thermal expansion (room temperature to 500℃)/X10-6/℃ | 2.0≤α≤3.7 | ||||
Bending strength/MPa | Four-point test | ≥750 | ≥650 | ≥530 | |
Three-point test | ≥820 | ≥720 | ≥550 | ||
Vickers hardness(HV) | ≥1420 | ≥1330 | ≥1270 | ||
Fracture toughness | ≥6 | ≥5 | ≥5 | ||
Crushing load ratio | 40% | 35% | 30% | ||
microcosmic structure | Air hole/μm | ≤10 | ≤10 | ≤25 | |
Inclusion | 25<S≤50 | ≤4 | ≤8 | ≤16 | |
50<S≤100 | ≤1 | ≤2 | ≤4 | ||
100<S≤200 | 0 | ≤1 | ≤25 | ||
S>200 | 0 | 0 | ≤1 |
Ceramic product processing accuracy :
Item | Precision value | ||||
Dimensional exact values | Up to 0.001mm | ||||
Degree of finish | Up to mirror | ||||
The number of concentricities | Up to 0.003mm | ||||
The number of parallelism | Up to 0.002mm | ||||
Bore tolerance | The minimum can be machined 0.005mm | ||||
Straight groove | The narrowest machined groove is 0.1*100mm | ||||
Thickness dimension | Minimum machining to 0.08mm | ||||
Screw thread | Min machining inner thread M2, outer thread no limited | ||||
Cylindricity dimension | Up to 0.004mm | ||||
Linear tolerance | Up to 0.001mm | ||||
Min aperture | The minimum processing capacity is 0.07mm |
Applications of silicon nitride cylindrical nozzles:
Metallurgical industry
In the metallurgical industry, silicon nitride ceramic cone tube and high temperature resistant ceramic sandblasting nozzle are widely used in high temperature and high pressure environment such as smelting furnace and melting equipment, bearing the key functions of sandblasting, cooling, heat insulation and so on.
Automobile manufacturing
In the automotive industry, these precision ceramic products are used as sand blasters for spraying equipment, which can operate stably in high temperature and high pressure environments, ensuring the accuracy and stability of the coating process.
Aerospace
In the aerospace sector, silicon nitride ceramic cones and high temperature resistant ceramic sand blasters are used in many key components that can withstand extreme temperatures and pressures to ensure stable operation.
Chemical industry
In the chemical industry, these precision ceramic products are used for spraying, cooling and other applications of corrosive media, such as chemical pipeline cleaning equipment, chemical reactors, etc.