Silicon nitride ceramic valve

Product Introduction of Silicon Nitride Ceramic Valves

Silicon nitride ceramic valves are valve products made primarily from silicon nitride (Si₃N₄). Silicon nitride is an inorganic compound with the chemical formula Si₃N₄, possessing the following notable characteristics:

1. High hardness and wear resistance: Hardness can reach approximately HRA93 (HV10 ≥ 1400), capable of resisting the impact of micro-jets and micro-cutting generated by cavitation bubble collapse.

2. Excellent fracture toughness: KIC ≥ 6.5 MPa·m¹/², effectively absorbing impact energy and inhibiting crack initiation and propagation.

3. High-temperature resistance: Can withstand temperatures up to 1000℃ in air and up to 1400℃ in a protective atmosphere.

4. Chemical stability: Resistant to corrosion from all inorganic acids except hydrofluoric acid and sodium hydroxide solutions below 25%.

5. Low density and high elastic modulus: Density is 3.2-3.3 g/cm³, and the elastic modulus reaches 300-320 GPa.

6. Self-lubricating properties: Possesses a low coefficient of friction, reducing friction with the contact surfaces of the valve core or ball.

Application Fields

Due to their excellent performance, silicon nitride ceramic valves have a wide range of applications in various industrial fields:

1. Mechanical field: High-speed bearings for high-speed machine tool spindles, aerospace engine bearings, automotive engine bearings, and wind turbine bearings.

2. Chemical and marine industries: Pipelines for conveying corrosive media, wear-resistant valve systems.

3. High-temperature processes: High-temperature pipelines in the petrochemical industry, high-temperature environments in the metallurgical industry.

Technical Parameters

Supports custom specifications.