technical Si3N4 ceramic structural machinery parts
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Silicon Nitride Ceramic:
TElectronic ceramics can be divided into five categories according to their functions and uses: insulating ceramics, capacitor ceramics, ferroelectric ceramics, semiconductor ceramics and ion ceramics. Referred to as device porcelain, it has excellent electrical insulation properties and is used as electronic ceramics for structural parts, substrates and casings in electronic equipment and devices. Insulation device porcelain includes various insulators, coil frames, tube holders, band switches, capacitor support brackets, integrated circuit substrates and packaging shells. The basic requirements for this type of porcelain are low dielectric constant ε, small dielectric loss tanδ, high insulation resistivity ρ, high breakdown strength E, and good dielectric temperature characteristics and frequency characteristics. In addition, higher mechanical strength and chemical stability are also required. Among these types of ceramics, talc porcelain and alumina porcelain are the most widely used. Their main crystalline phase components are and respectively. Talc porcelain has excellent electrical insulation and low cost, and is a typical high-frequency device porcelain used in radio frequency bands. Alumina porcelain is a kind of high-frequency, high-temperature and high-strength device porcelain with better electrical insulation. Its electrical and physical properties increase with the increase of the aluminum oxide content. Commonly used are high alumina porcelain containing 75%, 95%, and 99% aluminum oxide. In some highly demanding integrated circuits, even pure corundum porcelain with an aluminum oxide content of 99.9% is used, whose properties are similar to sapphire single crystals. The disadvantages of high alumina porcelain, especially pure corundum porcelain, are difficulty in manufacturing, high firing temperature and high price.
properties:
High hardness, high strength, wear resistance, corrosion resistance, high temperature(1200°), good thermal diffusivity, good thermal shock resistance(avoid the temperature changing rapidly), good insulativity, low density. The comprehensive properties are best in most of structure ceramic.
Data Sheet↓
Color: Black Grey
Density: ＞3.2g/cm3
Hardness: HRA90
Vickers Hardness (Hv50): ＞1550 HV0.5
Modulus of Elasticity: 290Gpa
Flexural Strength: ＞600Mpa
Compressive Strength: 2500Mpa
Modulus of Elasticity(25°C): 65Gpa
Fracture toughness:＞6.0 Mpam1/2
Maximum Use Temperature: 1200°C
Thermal Conductivity:15-20 W(m.K)
Thermal Expansion Coefficient: ＞3.1 10-6/°C
Thermal Shock Resistance: 500 △T°C
Special Heat Capacity: 700 KJ/kg.K
Dielectric Strength: 1 KV/mm
Dielectric Constant: er
Volume Resistivity(20°C): 1.0*10(12)Ω.cm
Application industry:
Machinery, electronic, semiconductor, chemical, petroleum, smelt.
Specific application:
Welding shaft, electronic substrate, plunger, nozzle, slide guide, diesel parts, metal molding, shaft wheels 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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FAQ
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A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
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A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
