Alumina Ceramic Crucible For Metal Calcination Experiment
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Advantages of Alumina Ceramic Crucible
1. Alumina ceramic crucibles heat resistant about 1600 degrees, suitable for K2S207 and other acidic materials melting samples.
2. The alumina ceramic crucibles can be boiled and cleaned by dilute HCl to ensure the purity of the material and its high temperature resistance.
3. Alumina ceramic crucibles material high density, good oxidation resistance, 400-500 degrees higher than graphite material, up to 900 degrees, long service life.
4. Alumina ceramic crucibles has high heat resistance, low thermal expansion coefficient, good thermal shock resistance and good corrosion resistance.
5. Alumina ceramic crucibles stable chemical properties, basically no reaction with the melted metal, improve the purity of the alloy.
Applications of Alumina Ceramic Crucible
1. Materials Science: Sintering and annealing processes for ceramic and metal samples.
2. Chemistry: Thermal decomposition and calcination of chemical compounds.
3. Metal Casting: Melting and holding of metals before casting into molds.
4. Alloy Production: Mixing and refining of different metals to create alloys.
5. Gravimetric Analysis: Heating samples to remove volatile substances and determine their mass.
6. Ash Content Determination: Measuring the inorganic residue left after the combustion of organic material.
7. Differential Thermal Analysis (DTA): Studying thermal transitions in materials by measuring temperature differences.
8. Thermogravimetric Analysis (TGA): Measuring changes in mass as a function of temperature.
9. Catalyst Preparation: Calcining catalyst materials to achieve desired properties.
10. Chemical Synthesis: Heating and reacting chemicals at high temperatures.
The difference between alumina ceramic crucibles and evaporating vessels
Many people are not familiar with the difference between alumina ceramic crucibles and evaporating vessels. Although there are many similarities between the two in use, there are still significant differences in actual use.
Alumina ceramic crucibles can heat non aqueous substances, such as melting non corrosive salts, igniting precipitates, carbonizing or ashing certain complex specimens, etc; Evaporating vessels are generally used to evaporate solutions.
The material of alumina ceramic crucibles must be to good thermostability, 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.
The alumina ceramic crucible can be directly heated or placed in a high-temperature heating furnace for heating; Ceramic evaporating vessels can also be heated directly with an open flame, while glass evaporating vessels usually need to be padded with asbestos mesh to be heated.
4. Due to the fact that alumina ceramic 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 alumina ceramic crucibles; The evaporating vessels is usually taken by hand, and a glass rod or spoon can be used to transfer reagents.
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 | Compressive strength | MPa | 2300 |
6 | 20℃ leakage rates | Torr・L/sec | >10-11=1.33322×10-12Pa・m3/sec |
7 | Twisting in high temperature | mm | 0.2 allowed in 1600℃ |
8 | Bonding in high temperature | not bonded in 1600℃ | |
9 | 20—1000℃ coefficient of thermal expansion | mm.10-6/℃.m | 8.2 |
10 | Thermal conductivity | W/m.k | 25 |
11 | Electric insulation strength | KV/mm | 20 |
12 | 20℃direct current insulation resistance | Ohm/cm | 1014 |
13 | High-temperature insulation resistance | 1000℃ MΩ | ≥0.08 |
1300℃ MΩ | ≥0.02 | ||
14 | Thermal shock resistance | 4 times not cracked in 1550℃ | |
15 | Maximum working temperature | ℃ | 1800 |
16 | Hardness | Mohs | 9 |
17 | Flexural strength | Mpa | 35 |
Our factory
Jinzhou Yunxing Industrial Ceramics Co., Ltd. was established in 2000, mainly producing various types of tubular ceramic products and various industrial parts with alumina content above 99.3%. The factory covers an area of 4000 square meters.
The company's main products are: alumina ceramic tubes, alumina ceramic crucibles, alumina ceramic rods, alumina ceramic boats, alumina ceramic plates, alumina ceramic parts, etc.
There ars 3pcs 1800 ° C high-temperature kilns ,2pcs 1400 ° C low-temperature kilns produced by our company independently. There are slip casting(main),and extrusion molding,injection molding etc other molding technologies,which can satisfy the produvtion requirements of various specific ceramics products.
The company has 105 employees, including one senior ceramic engineer, three engineers, six overseas sales staff, and four professional after-sales staff.
FAQ
A1. Use as a material for industrial furnaces due to its ability to maintain its hardness at high temperatures. Used as a protector for high- temperature thermal couples. Used as a material for the chemical industry due to its high corrosion resistance.
A2. The temperature range of alumina ceramic crucibles is typically between 1600°C to 1800°C.
A3.Alumina is also widely used in refractory products, due to its high melting point. It is especially suited to demanding applications where the strength of the refractory must be retained at high temperatures.
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