Alumina Ceramic
Alumina Ceramic, Al2O3 Ceramic
Alumina ceramics are a type of ceramic material with α-Al2O3 as the main crystal phase. The Al2O3 content is generally 75%~99.5%. Alumina ceramics have good electrical insulation, corrosion resistance, and wear resistance, are relatively cheap, and have balanced comprehensive performance. They are widely used in mechanical parts and are one of the most widely used ceramic materials. High-purity (≥99.5%) alumina has good corrosion resistance and plasma etching resistance and is widely used in pan-semiconductor equipment. Alumina ceramics are a type of ceramic material with α-Al2O3 as the main crystal phase. The Al2O3 content is generally 75%~99.5%.
Performance and Applications
-High mechanical strength: The bending strength of Al2O3 ceramics can reach 250MPa, and hot pressed products can reach 500MPa. The purer, the higher the strength, which can be maintained up to 900℃. Using its mechanical strength, it can be made into device ceramics and other mechanical parts.
-High resistivity and good electrical insulation performance: The room temperature resistivity is 1015Ω·cm, and the insulation strength is 15kV/mm. Using its insulation and strength, it can be made into substrates such as spark plugs and circuit shells.
-High hardness: With a Mohs hardness of 9 and excellent wear resistance, it is widely used in the manufacture of tools, grinding wheels, abrasive tools, wire drawing dies, extrusion dies, bearings, etc. When processing automobile engines and aircraft parts with Al2O3 ceramic tools, high precision can be obtained at high cutting speeds.
-High melting point and corrosion resistance: With a melting point of 2050℃, it can better resist the erosion of molten materials such as Be, Sr, Ni, Al, Fe, Ta, and Mn. It also has a high ability to resist erosion by NaOH, glass, and slag. In an inert atmosphere, it does not interact with Si, Sb, and Bi. Therefore, it can be used as refractory materials, furnace tubes, glass drawing crucibles, hollow balls, fibers, thermocouple protective sleeves, etc.
-Excellent chemical stability: Many complex sulfides, phosphides, arsenides, chlorides, nitrides, bromides, iodides, oxides, sulfuric acid, hydrochloric acid, nitric acid, and hydrofluoric acid do not react with Al2O3. Therefore, Al2O3 can be made into pure metal and single crystal growth crucibles, human joints, artificial bones, etc.
-Optical properties: It can be made into light-transmitting materials (transparent Al2O3 ceramics) to manufacture sodium vapor lamps, microwave fairings, infrared windows, laser oscillation elements, etc.
-Ionic conductivity: It is used as solar cell materials and battery materials.
Alumina Products
Edgetech Industries, Advanced Ceramics Division is a leading supplier of ceramic materials. We offer alumina products of high purity and at a competitive price.
Our advanced ceramics include Hot pressed Boron Nitride (HBN), Pyrolytic Boron Nitride (PBN), Silicon Nitride (Si3N4), Aluminum Nitride (AlN), Zirconia (ZrO2), Alumina (Al2O3), Lanthanum Hexaboride (LaB6), Cerium Boride (CeB6), Silicon Carbide (SiC), Boron Carbide (B4C), etc. Customized and complex ceramic parts are available on request.