High Purity Alumina Ceramic Crucible , Multi Capacity Alumina Crucible Boat
Advantages of Alumina Ceramic Crucible
Alumina ceramic crucibles become an ideal choice under extreme temperature conditions due to their high melting point, low thermal expansion, and stable chemical properties. Although they have higher costs and require careful handling, the comprehensive performance of alumina ceramic crucibles in terms of high-temperature stability, corrosion resistance, and service life makes them irreplaceable in key scientific research and industrial processes. For scenarios requiring long-term high-temperature treatment or repeated thermal cycling, alumina ceramic crucibles are generally the most cost-effective solution.
Applications of Alumina Ceramic Crucible
1. Laboratory Research: Alumina ceramic crucibles used in various scientific disciplines such as chemistry, materials science, and metallurgy for sample preparation, chemical analysis, and synthesis of advanced materials.
2. Metal and Ceramic Processing: Alumina ceramic crucibles employed in the melting, casting, and heat treatment of metals and ceramics, providing a reliable containment vessel for high-temperature processes.
3. Semiconductor Manufacturing: Alumina ceramic crucibles crucial in semiconductor fabrication processes, including crystal growth, wafer processing, and thermal treatment, where precise temperature control and contamination-free environments are paramount.
4. Glassmaking: Alumina ceramic crucibles used for glass melting and refining operations, ensuring the purity and quality of molten glass for the production of optical, electronic, and specialty glass products.
The difference between alumina ceramic crucibles and evaporating vessels
1. Different uses
Alumina ceramic crucibles can heat non aqueous substances, such as melting non corrosive salts, igniting precipitates, carbonizing or ashing certain complex specimens, etc; Evaporating dishes are generally used to evaporate solutions.
2. Different materials
The material of alumina ceramic crucibles must be resistant to high temperatures, and the upper temperature limit for ceramic crucibles is about 800 degrees Celsius; Alumina ceramic crucibles can be used at high temperatures above 1000 degrees Celsius, while evaporating vessels are usually made of ordinary glass or ceramics, and should be used at temperatures below 400 degrees Celsius.
3. Different heating methods
The alumina ceramic crucible can be directly heated or placed in a high-temperature heating furnace for heating; Ceramic evaporating dishes can also be heated directly with an open flame, while glass evaporating dishes usually need to be padded with asbestos mesh to be heated.
4. Due to the fact that crucibles are commonly used instruments in thermogravimetric analysis and have very precise quality requirements, it is generally necessary to use waste crucible pliers when using crucibles; The evaporating dish is usually taken by hand, and a glass rod or spoon can be used to transfer reagents.
5. The main purpose of alumina ceramic crucibles is to burn and precipitate, which can be used for high-temperature treatment of samples, such as ashing, charcoal burning, etc. The alumina ceramic crucible can withstand high temperatures of 1500 degrees Celsius. Ceramic evaporating dishes are mainly used for evaporating and concentrating liquids. When not subjected to quantitative analysis, they can also be used for drying solids, ashing filter paper, and high-temperature calcination (below 500 degrees Celsius).
Size,Performance index
Alumina ceramic performance index (Notice of Correct in Leakeage Rate）
NO. | Property | Unit | Alumina |
1 | Al2O3 | % | >99.3 |
2 | SiO2 | % | - |
3 | Density | g/cm3 | 3.88 |
4 | Water absorption | % | 0.01 |
5 | Cold compressive strength | MPa | 350 |
6 | 20ºC leakage rates | Torr・L/sec | >10-11=1.33322×10-12Pa・m3/sec |
7 | Twisting in high temperature | mm | 0.2 allowed in 1600ºC |
8 | Bonding in high temperature | not bonded in 1600ºC | |
9 | 20-1000ºC coefficient ofthermalexpansion | mm.10-6/ºC.m | 8.2 |
10 | Thermal conductivity | W/m.k | 25 |
11 | Electric insulation strength | KV/mm | 20 |
12 | 20ºCdirect current insulation resistance | Ohm/cm | 1014 |
13 | High-temperature insulation resistance | 1000ºC MΩ | ≥0.08 |
1300ºC MΩ | ≥0.02 | ||
14 | Thermal shock resistance | 4 times not cracked in 1550ºC | |
15 | Maximum working temperature | ºC | 1800 |
Our factory
Slip casting moulding: Inject the prepared slurry into the gypsum mold and let it stand for a period of time to allow the gypsum mold to absorb moisture. The slurry forms a uniform body on the inner wall of the mold.
Injection moulding: Inject a slurry containing paraffin into a metal mold at a certain temperature and pressure, and after the body cools and solidifies, perform demolding to prepare ceramic bodies.
Extrusion moulding: Suitable for long tube products, the powder is extruded into shape through an extruder.
Why Choose Us?
1. 20 years of professional production industrial ceramics factory.
2. High quality products with low price.
3. High alumina ceramic products 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
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