YDTech® suppliers of ceramics aluminium oxide Al2O3 structural parts, fasteners, slots, blades, teethes, flanges, crucibles! manufacturers of ceramics alumina Al2O3 sticks, plungers, nozzles, impellers, shafts, seals, flanges, crucibles in china.
alumina ceramics, as alumina (Al2O3), or aluminum oxide (Al2O3), is an industrial oxide ceramic known for its extreme hardness and high thermal conductivity. the properties of alumina ceramics make them one of the most widely used ceramics for structural, wear, and corrosive environments.
aluminum oxide, as a material for precision ceramics, has multiple excellent characteristics, including high hardness, excellent chemical stability, high temperature stability, good insulation performance, and dimensional stability. This makes it have important applications in various fields such as wear-resistant parts, chemical vessels, high-temperature heating elements, electronic insulators, and components with high precision size control requirements.
alumina can be produced by sinter or by hot pressing using appropriate sintering aids. alumina-based ceramics are one of the most studied and characterized advanced ceramic materials known today. due to the important combination of properties, their behavior has been thoroughly researched. Alumina is characterized by high hardness, excellent resistance to corrosion, thermal stability, good dielectric properties, low loss tangent, and stiffness.
aluminum oxide is widely popular due to its balanced mechanical properties, including high strength, high hardness, and good wear resistance. These characteristics enable alumina to play a crucial role in many fields. aluminum oxide is the most commonly used abrasive grain in the woodwork and metalwork industry. This is because it does a better job than silicon carbide on several materials, including bare wood, painted surfaces, and metal.
chemistry properties for precision ceramics Al2O3 alumina
| Al2O3 ceramics | unit | Al2O3 | Al2O3 | Al2O3 | Al2O3 | Al2O3 | |||
| percentage | ... | 95% | 96% | 99% | 99.5% | 99.7% | |||
| color | ... | white | white | ivory | ivory | ivory | |||
| density | g/cm3 | 3.7 | 3.7 | 3.85 | 3.9 | 3.9 | |||
| ceramics Al2O3 alumina blades, teethes, flanges, crucibles, plungers, ceramics Al2O3 aluminium oxide nozzles, impellers, shafts, seals, discs, impellers, knives, pipes, washers, bolts, guides, filters, components. | |||||||||
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Alumina is very common in the production of refractory materials for high-temperature industrial furnaces. Its high melting point and stability enable it to work in extreme high-temperature environments without deformation or damage.
because of their excellent chemical stability, alumina ceramics are used widely in acid-resistant pump impellers, pump bodies, acid-carrying pipe linings and valves. aluminum oxide ceramics are used in the manufacture of textile wear parts and knives. this is due to their extreme hardness and wear resistance.
physical properties for precision ceramics Al2O3 alumina
| Al2O3 ceramics | unit | Al2O3 | Al2O3 | Al2O3 | Al2O3 | Al2O3 | |||
| percentage | ... | 95% | 96% | 99% | 99.5% | 99.7% | |||
| Flexural strength(20℃) | Mpa | 300 | 300 | 330 | 360 | 380 | |||
| compressive strength(20℃) | Mpa | 2000 | 2000 | 2000 | 2350 | ... | |||
| Elastic modulus(20℃) | Gpa | 270 | 275 | 370 | 370 | 380 | |||
| Fracture toughness(20℃) | MPam 1/2 | 3.5 | 3.5 | 4 | 4 | ... | |||
| Vipoll coefficient(20℃) | ... | 0.2 | 0.22 | 0.22 | ... | ... | |||
| hardness(20℃) | HRA | 90 | 90 | 90 | ... | ... | |||
| Vickers hardness(HV1) | kg/mm2 | 1600 | 1600 | 1600 | 1650 | 1750 | |||
| Rockwell hardness(45N) | R45N | 83.5 | 83.5 | 83.5 | ... | ... | |||
| ceramic Si3N4 ZrO2 Al2O3 cylindrical needles, rollers, bearings, dowels, pins, balls,valves, sticks, rods, ceramic Si3N4 ZrO2 Al2O3, substrates, rings, plates, tubes, blocks,threads, structural parts, fasteners, silicon nitride ceramic Si3N4 ZrO2 Al2O3 slots, blades, teethes, flanges, crucibles, plungers, nozzles, impellers, shafts, seals, laser cutting. | |||||||||
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Aluminum oxide is also widely used in the electronics industry, especially in the manufacturing of substrates, insulators, and packaging materials. Its excellent electrical insulation and thermal conductivity make it an ideal material for electronic components alumina ceramic materials are used in making spark plugs, which are useful in a wide variety of engines. Transparent alumina ceramics are used in making high-pressure sodium lamps and infrared detection window material.
thermal properties for precision ceramics Al2O3 alumina
| Al2O3 ceramics | unit | Al2O3 | Al2O3 | Al2O3 | Al2O3 | Al2O3 | |||
| percentage | ... | 95% | 96% | 99% | 99.5% | 99.7% | |||
| color | ... | white | white | ivory | ivory | ivory | |||
| Coefficient of thermal expansion | 10-6K-1 | 6.5 | 6.5 | 7.6 | 7.2 | 7.2 | |||
| Thermal conductivity | W/mk | 20 | 25 | 27.5 | 32 | 32 | |||
| Thermal shock stability | △T.℃ | 200 | 200 | 200 | 250 | ... | |||
| Specific heat capacity | J/g·k | ... | ... | 0.79 | 0.78 | 0.79 | |||
| Maximum temperature | ℃ | 1600 | 1600 | 1650 | 1650 | ... | |||
| ceramic Si3N4 ZrO2 Al2O3 cylindrical needles, rollers, bearings, dowels, pins, balls,valves, sticks, rods, ceramic Si3N4 ZrO2 Al2O3, substrates, rings, plates, tubes, blocks,threads, structural parts, fasteners, silicon nitride ceramic Si3N4 ZrO2 Al2O3 slots, blades, teethes, flanges, crucibles, plungers, nozzles, impellers, shafts, seals, laser cutting. | |||||||||
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The stability of the chemical and physical properties of alumina makes it an indispensable material in precision industry. These characteristics include heat resistance, high thermal conductivity, high strength and hardness, as well as excellent electrical insulation and corrosion resistance.
with an alumina content higher than 95%, alumina ceramics can be used as excellent electrical insulators. They also have a low dielectric loss, with a wide range of applications in electronics and electrical appliances. Transparent aluminum oxide shows good permeability to visible light and infrared rays.
electrical properties for precision ceramics Al2O3 alumina
| Al2O3 ceramics | unit | Al2O3 | Al2O3 | Al2O3 | Al2O3 | Al2O3 | |||
| percentage | ... | 95% | 96% | 99% | 99.5% | 99.7% | |||
| 20 ℃ Volume resistance | Ωcm | 1014 | 1014 | 1014 | 1014 | 1014 | |||
| Dielectric strength | KV/mm | 10 | 10 | 10 | 15 | 15 | |||
| 1MHZ dielectric constant | ... | 9 | 9 | 9.1 | 9.9 | 9.9 | |||
| Megahertz dielectric loss angle (1MHz 20 ℃) | tanδ | 3*10-4 | 2*10-4 | 3*10-4 | 1*10-4 | 1*10-4 | |||
| ceramic Si3N4 ZrO2 Al2O3 cylindrical needles, rollers, bearings, dowels, pins, balls,valves, sticks, rods, ceramic Si3N4 ZrO2 Al2O3, substrates, rings, plates, tubes, blocks,threads, structural parts, fasteners, silicon nitride ceramic Si3N4 ZrO2 Al2O3 slots, blades, teethes, flanges, crucibles, plungers, nozzles, impellers, shafts, seals, laser cutting. | |||||||||
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The heat resistance and good thermal conductivity of alumina make it very useful in applications that require rapid heat dissipation, such as LED lighting and power electronics. Mechanical properties: High strength and hardness ensure the durability of alumina under physical stress, which is particularly important in aerospace and automotive manufacturing.
The high electrical insulation and strong corrosion resistance of alumina make it suitable for chemical treatment environments and electrical applications. In addition, its high biocompatibility also makes it very popular in medical devices and biological implant materials. other essential applications of alumina ceramics can be seen in seal rings, medical prostheses, laser tubes, thermocouple tubes, electronic substrates, ballistic armor, electrical insulators, grinding media, and wear components.