High Purity Alumina Crucibles For Metals Melting , Ceramic Powders Heat Treatment
Brand Name:ZG
Certification:CE
Model Number:MS
Minimum Order Quantity:1 piece
Delivery Time:5-8 working days
Payment Terms:L/C, D/A, D/P, T/T, Western Union, MoneyGram
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Location:
Zhengzhou Henan China
Address:
No. 26, Dongqing Street, High-tech Zone, Zhengzhou ,Henan, China
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within 48 hours
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High Purity Alumina Crucibles for metals melting, ceramic powders heat treatment, annealing, fusion processes
Alumina (Al2O3) is one of the most important ceramic oxides which is widely used for structural, electronics, medical and electrical fields. Alumina has wide application as engineering technical ceramic due to its high hardness value, high abrasion (wear) resistance and low cost. It has high melting point (2054 °C), and boiling point (2977 °C) low thermal expansion and high compressive strength which provides good thermal shock resistance. Alumina is one the best electrical insulations at high temperatures making it excellent choice as a thermodielectric refractory and is transparent to microwave radio frequencies. It’s fairly high chemical stability, make Alumina a good material to withstand chemical corrosion. ZG is producing a broad range of analytical grade, recrystallized, dense Alumina crucibles in various sizes and forms. Custom solutions available upon request.
Alumina crucibles are the material of choice for a wide range of
general purpose laboratory and industrial applications. Alumina has
wide application as a crucible ceramic due to its high hardness
value, high abrasion (wear) resistance, high corrosion resistance
and low cost compared with other refractories. It has high
compressive strength which provides good thermal shock resistance.
High purity Alumina is one the best electrical insulations at high
temperatures making it excellent choice as a thermodielectric
refractory and is transparent to microwave radio frequencies.
ZG recrystallized Alumina t-ceramics Crucibles Key Features:
- 1750 C Service temperature
- 99.7% Alumina content, less than 300ppm Fe2O3
- Excellent chemical resistance to acids, bases & organics even at elevated temperatures
- Low porosity and fine surface finish enhance cleaning and prevents chemical attack
- Superior mechanical strength and wear resistance
- Consistent dimensional control
- State-of-the-art crucibles manufactured by the most cost-effective process.
Related Data
| Main component | 99%Al2O3 | S-SiC | ZrO2 | Si3N4 | ||
| Physical Property | Density | g/cm3 | 3.9 | 3.1 | 6 | 3.2 |
| Water Absorption | % | 0 | 0.1 | 0 | 0.1 | |
| Sinter Temperature | °C | 1700 | 2200 | 1500 | 1800 | |
| Mechanical Property | Rockwell Hardness | HV | 1700 | 2200 | 1300 | 1400 |
| Bend Strength | kgf/mm2 | 3500 | 4000 | 9000 | 7000 | |
| Compression Intensity | Kgf/mm2 | 30000 | 20000 | 20000 | 23000 | |
| Thermal Property | Maximum working temperature | °C | 1500 | 1600 | 1300 | 1400 |
| thermal expansion coefficient 0-1000°C | /°C | 8.0*10-6 | 4.1*10-6(0-500°C) | 9.5*10-6 | 2.0*10-6(0-500°C) | |
| 5.2*10-6(500-1000°C) | 4.0*10-6(500-1000°C) | |||||
| Thermal Shock resistance | T(°C) | 200 | 250 | 300 | 400-500 | |
| Thermal Conductivity | W/m.k(25°C | 31 | 100 | 3 | 25 | |
| 300°C) | 16 | 100 | 3 | 25 | ||
| Electrical Property | Resisting rate of Volume | ◎.cm | ||||
| 20°C | >1012 | 106-108 | >1010 | >1011 | ||
| 100°C | 1012-1013 | – | – | >1011 | ||
| 300°C | >1012 | – | – | >1011 | ||
| Insulation Breakdown Intensity | KV/mm | 18 | semiconductor | 9 | 17.7 | |
| Dielectric Constant (1 MHz) | (E) | 10 | – | 29 | 7 | |
| Dielectric Dissipation | (tg o) | 0.4*10-3 | – | – | – | |
Applications.
Analytical applications, metals melting, ceramic powders heat treatment, material acid treatment even at elevated temperature, crucibles for annealing, crucibles for fusion processes, crucibles for crystal growing, crucibles for extremely corrosive environments, like plasma etching
High Purity Alumina Crucibles For Metals Melting , Ceramic Powders Heat Treatment
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