wearable Al2O3 Alumina Ceramic Parts
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Alumina Ceramic:
(Al2O3·H2O and Al2O3·3H2O) are the main minerals of aluminum in nature. After pulverizing, they are impregnated with high-temperature sodium hydroxide solution to obtain sodium metaaluminate solution; the residue is removed by filtration, the filtrate is cooled and aluminum hydroxide crystals are added. After a long time of stirring, the sodium aluminate solution will be separated into precipitates of aluminum hydroxide; the precipitate is separated and washed, and then calcined at a temperature of 950-1200 ° C to obtain α-type alumina powder, and the mother liquor can be recycled. This method was invented by the Austrian scientist K.J. Bayer in 1888 and is still the main method of industrial production of alumina. It is called the Bayer method. In the crystal lattice of α-type alumina, the oxygen ions are hexagonally packed tightly, and Al3+ is symmetrically distributed in the octahedral coordination center surrounded by oxygen ions. The lattice energy is large, so the melting point and boiling point are very high. Α-type alumina is insoluble in water and acid, also known as aluminum oxide in industry. It is the basic raw material for making metal aluminum. It is also used in making various refractory bricks, refractory enamel, refractory tubes, high temperature resistant experimental instruments, and as an abrasive. , flame retardant, fillers, etc.; high-purity α-alumina is also the raw material for the production of artificial corundum, artificial ruby and sapphire; also used to produce the board base of modern large-scale integrated circuits.
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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