precision cnc Alumina Ceramic bearing sleeve ring
Reputation depends on quality, quality comes from Hard!
Alumina Ceramics:
The core technology of the alumina ceramic low pressure method is the catalyst. The TiCl4-Al(C2H5)3 system invented by Ziegler in Germany is the first-generation catalyst for polyolefins, with low catalytic efficiency, about several kilograms of polyethylene per gram of titanium. In 1963, Solvay in Belgium pioneered the second-generation catalyst with magnesium compounds as the carrier, with a catalytic efficiency of tens of thousands to hundreds of thousands of grams of polyethylene per gram of titanium. The second-generation catalyst can also save the post-treatment process of removing catalyst residues. Later, high-efficiency catalysts for gas phase method were developed. In 1975, Italy's Monte Edison Group developed a catalyst that can directly produce spherical polyethylene without granulation. It is called the third-generation catalyst, which is another revolution in high-density polyethylene production. Polyethylene is very sensitive to environmental stress (chemical and mechanical effects), and its heat aging resistance is worse than the chemical structure and processing of polymers. Polyethylene can be processed by general thermoplastic molding methods (see plastic processing). It has a wide range of uses, mainly used to make films, packaging materials, containers, pipes, monofilaments, wires and cables, daily necessities, etc., and can be used as high-frequency insulating materials for TVs and radars. With the development of petrochemical industry, polyethylene production has developed rapidly, and the output accounts for about 1/4 of the total output of plastics. In 1983, the total production capacity of polyethylene in the world was 24.65 Mt, and the capacity of installations under construction was 3.16 Mt. According to the latest statistics in 2011, the global production capacity reached 96 Mt. The development trend of polyethylene production shows that production and consumption are gradually shifting to Asia, and China is becoming the most important consumer market.
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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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.
