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High Strength Resistance Silicon Nitride Grinding Balls Silicon Nitride Bearing Balls
High Strength Resistance Silicon Nitride Grinding Balls Silicon Nitride Bearing Balls
FOB Price
USA
Main Products : hexagonal boron nitride powder, boron nitride ceramics, silicon nitride ceramics, alumina ceramics, beryllium oxide ceramics
1115-3, No.9 Qianshan Road, Zhuhai, Guangdong Province, China Zhuhai, California
High Strength Resistance Silicon Nitride Grinding Balls Silicon Nitride Bearing Balls Details
Place of Origin
China
Supply Type
In-Stock Items
Condition
New
High Strength Resistance Silicon Nitride Grinding Balls Silicon Nitride Bearing Balls Introduce

Si3N4 ceramic is one kind atomic crystal industrial ceramic. It has the characteristics of wear resistance, high temperature resistance, high temprerature strength, high thermal stability, resistance to most metal solutions and acid-alkali corrosion, high thermal conductivity and good insulation performance. It is a new material with the best comprehensive performance.

Features

• Excellent compactness and high strength

• Excellent thermal conductivity and thermal-shock resistance

• High hardness, self lubrication and good wear resistance

• Low thermal expansion coefficient and high temperature resistance

• No infiltration with aluminum and other non-ferrous molten metals, good corrosion resistance

Ceramic bearings have developed rapidly since 1972. It has been widely used in precision machine tools, automobiles, aeroengines, chemical instruments, superconducting devices and other fields. As a bearing material, the most basic characteristic is the rolling fatigue life. In order to evaluate the applicability of various ceramic bearings, the rolling life test of ceramic plate is carried out, and the order of rolling life is alumina < silicon carbide < zirconia < silicon nitride. It can be seen that Si3N4 is the most suitable bearing material among the above four common engineering structural ceramics.

Technical Specification:

Silicon Nitride Balls are very high-cost grinding media that are used for milling same materials (silicon nitride ball to mill silicon nitride materials) to avoid contamination. They are now available in 2mm and 3mm and sizes up to 25mm. They are a special order item.

Silicon Nitride Ceramic Ball

Accuracy Grade(μm) (GB/T 308.2-2010(E) Standard)

GradeVdwsΔSPHVdwlRa
G3≤0.08≤0.080.13≤0.01
G5≤0.13≤0.130.25≤0.014
G10≤0.25≤0.250.5≤0.02
G16≤0.4≤0.40.8≤0.025
G20≤0.5≤0.51≤0.032

Advantages of Silicon Nitride Bearing balls:

PropertiesOrdinary Steel BallSilicon Nitride BallsEvaluations
Density(kg/cm3)7800≥3220The lower the density, the less energy loss
Young's Modulus (GPa)210≥300The higher the modulus number, the smaller the deformation
Vickers-hardness(GPa)814-18The higher the hardness, the better the rigidity
Toughness (MPa·m)16-256-8The higher the toughness, the better the impact resistance
Thermal Expansion Rate(10-6/K)12≤3The lower the thermal expansion rate, the smaller the deformation
Specific Heat Capacity(J/kg·K)450650The larger the specific heat, the smaller the temperature change
Use Upper Limit Temperature(℃)2301000The higher the online temperature, the wider the application field
Minimum Surface Roughness(μm)0.020.004-0.005The smaller the surface roughness, the smoother
Compressive Strength (MPa)7.5≥3000The higher the compressive strength, the longer the life
Resistivity (Ω·cm)0.00110^14The higher the resistivity, the better the insulation

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