wearable high temperature Al2O3 Alumina Ceramic ferrule bolt
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Alumina Ceramics:
Among the oxides having a melting point exceeding 2000 ° C, alumina is the most flexible and inexpensive material. Alumina ceramics are the most widely used, widely used, and most productive ceramic materials in oxide ceramics. According to research reports, Al2O3 has 12 kinds of polymorphic polymorphic variants, but there are mainly three kinds of applications, namely α-Al2O3, β-Al2O3 and γ-Al2O3. These three crystals have different structures, so their properties There are big differences.
α-Al2O3 is a trigonal system with the most compact structure, low chemical activity, high temperature stability, excellent electrical properties and best mechanical properties.
β-Al2O3 is a polyaluminate mineral with a high Al2O3 content. Its chemical composition contains a certain amount of alkaline earth metal oxides and alkali metal oxides, and can also exhibit ionic conductivity.
γ-Al 2 O 3 is a spinel type cubic structure. Unstable at high temperatures, poor mechanical and electrical properties. However, it has a high specific surface area and strong chemical activity, and can be used as an adsorbent material through technical improvements.
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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