Complaint
Alumina Ceramic:
Alumina ceramics are ceramic materials based on alumina (Al2O3) for thick film integrated circuits. Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. It should be noted that ultrasonic cleaning is required. Alumina ceramics is a versatile ceramic. Because of its superior performance, it has been widely used in modern society, satisfying the needs of daily use and special performance.
Alumina ceramics are classified into two types: high purity type and normal type.
The high-purity alumina ceramics have a Al2O3 content of 99.9% or more. Since the sintering temperature is as high as 1650-1990 ° C and the transmission wavelength is 1 to 6 μm, the molten glass is generally used to replace the platinum crucible; Sexual and alkali-resistant metal corrosion is used as a sodium lamp; it can be used as an integrated circuit substrate and high-frequency insulation material in the electronics industry.
Ordinary alumina ceramics are classified into 99 porcelain, 95 porcelain, 90 porcelain, 85 porcelain, etc. according to the Al2O3 content. Sometimes the Al2O3 content is 80% or 75%, which is also classified as ordinary alumina ceramic series. Among them, 99 alumina ceramic materials are used to make high temperature crucibles, refractory furnace tubes and special wear-resistant materials, such as ceramic bearings, ceramic seals and water valve sheets; 95 alumina ceramics are mainly used as corrosion-resistant and wear-resistant parts; In addition, due to the incorporation of part of talc, the electrical properties and mechanical strength are improved, and it can be sealed with metals such as molybdenum, niobium and tantalum, and some are used as electric vacuum device devices.
Alumina ceramic properties: High hardness, high strength, wear resistance, corrosion resistance, high temperacture (1600°), good thermal diffusivity, good insulativity, low cost etc.
| Properties | Units | 96% Al2O3 | 99% Al2O3 | Zirconia | Silicon Nitride | Machinable Ceramic |
| Material Characteristics | ||||||
| Gas Permeability | 0 | 0 | 0 | 0 | 0 | |
| Water Absorption | % | 0% | 0% | 0% | 0% | 0.038% |
| Colour | White | Ivory | White | Grey | White | |
| Density | g/cm3 | 3.7 | 3.85 | 6 | 3.2 | 2.7 |
| Physical Characteristics | ||||||
| Hardness | Kg/mm2 | 1100 | 1400 | 1100 | 1600 | 1175 |
| Modulus of Elasticity | Gpa | 300 | 350 | 200 | 300 | 65 |
| Flexural Strength | Mpa | 300 | 340 | 1150 | 600 | 108 |
| Compressive Strength | Mpa | 2100 | 2200 | 2500 | 2500 | 488 |
| Fracture Toughness | Mpam1/2 | 3.5 | 4 | 12 | 6 | |
| Thermodynamic Property | ||||||
| Max Use Temperature | °C | 1500 | 1650 | 1500 | 1800 | 800 |
| Thermal Conductiviey | W/(m.k) | 25 | 27.5 | 2.5 | 20 | 1.68 |
| Thermal Expansion Coefficient | 10-6/°C | 7.5 | 8 | 10 | 3.2 | 8.6 |
| Thermal Shock Resistance | △T°C | 200 | 200 | 250 | 600 | 200 |
| Specific Heat | J/kg.K | 860 | 860 | 500 | 500 | |
| Electrical Specification | ||||||
| Dielectric Strength | KV/mm | 12 | 10 | 5 | 40 | |
| Dielectric Constant | εr | 9.5 | 9.1 | 12 | 6 | 7 |
| Volume Resistivity | Ω | ≥1014 | ≥1014 | ≥1010 | ≥1014 | ≥1016 |
| Dielectric Loss Angle | 0.0002 | 0.0002 | 0.001 | |||
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. Show 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
FAQ
Q: Are you trading company or manufacturer?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. Or it is 15-30 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? Is it free or extra?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance, balance before shippment.
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