insulating machinable Alumina Ceramic cnc components
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Alumina Ceramics:
Structural ceramics include ceramic materials such as abrasion resistance, high strength, heat resistance, thermal shock resistance, hardness, high rigidity, low expansion and heat insulation; functional ceramics include acoustic, optical, electrical, magnetic, biological, chemical, and nuclear Functional ceramic materials. The basic physical properties of Si3N4 Under normal pressure, si3N4 has no melting point. The thermal expansion coefficient of Silicon Nitride directly decomposed at around 1870 °C is low. In addition to SiO2 (quartz) in ceramic materials, the thermal expansion coefficient of Si3N4 is almost low. 2.35×106/K, which is about 1/3 of A1203, its thermal conductivity is large, 18.4W/(m·K), and it has high strength, so its thermal shock resistance is very good, second only to quartz. And glass-ceramic, the thermal fatigue performance is also very good. The room temperature resistivity is 1.1x10"Q·cm, 5.7×106Q·cm at 900C, the dielectric constant is 8.3, and the dielectric loss is -0. 1 silicon nitride ceramic beads can reach HRC80 degrees, the limit high temperature is about 800 degrees
It is a high temperature insoluble compound, has no melting point, and has high resistance to high temperature creep. The binder-free reaction sintered silicon nitride has a softening point above 1800 °C.
At 1285 degrees, it reacts with dicalcium dinitrate to form calcium sulphide sulphide. At 600 degrees, the transition metal is reduced, nitrogen oxides are released, and the flexural strength is 147 MPa.
properties: High hardness, high strength, wear resistance, corrosion resistance, high temperacture (1600°), good thermal diffusivity, good insulativity, low cost etc.
Data Sheet↓
Color: White/Ivory Density: 3.9g/cm3 Alumina Content: 96% 99% 99.5% Gas permeability: 0 Water Absorption: 0 MONS' Hardness: 82 Vickers Hardness (Hv50): 15.7(1600) Gpa(Kg/mm²) Flexural Strength(20°C): 330Mpa Compressive Strength(20°C): 2000Mpa Fracture Toughness (20°C): 4 MPam1/2 Thermal Conductivity(20°C): 27.5W(m.K) Thermal Expansion Coefficient: 7.6 10-6/°C Thermal Shock Resistance: 200 △T°C
Maximum use temperature 1650°C
Dielectric Strength: ＞10 KV/mm
Dielectric Constant: 9.1er
Dielectric Loss Angle(1MHz): 0.0002-0.0003
Volume Resistivity(20°C): ＞1014Ω.cm
Application industry: Machinery, electronic, chemical, petroleum etc. Specific application: Electrical ceramic substrate, plunger, sealing ring 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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