What is alumina crucible?
Alumina Crucible is made of raw material aluminum oxide. Alumina is a ceramic material with high thermal conductivity, compressive strength, high temperature resisitance and thermal shock resistance. In addition, it can be easily combined with metals and other ceramic materials using brazing techniques and metalizing.
How do you use alumina in the crucible?
ALUMINA CRUCIBLE INSTRUCTIONS
- 1) CHECK YOUR CRUCIBLE FOR CRACKS, DAMAGE OR ABNORMALITIES WHEN RECEIVED.
- 2) HANDLE AND STORE YOUR CRUCIBLES WITH DUE CARE.
- 3) TAKE CARE WHEN INSTALLING YOUR CRUCIBLE.
- 4) PREVENT THERMAL SHOCK.
- 5) NEVER EXCEED THE MAXIMUM TEMPERATURE LIMIT FOR EACH CRUCIBLE.
How are alumina crucibles made?
Aluminum oxide is refined industrially from bauxite ore, which contains aluminum. After several purification processes, a substance called calcined alumina is obtained, which contains mostly alumina with some impurities, mainly sodium oxide. Calcined alumina is often used to make crucibles.
How do you clean alumina crucibles?
For cleaning very heavily contaminated alumina crucibles, the following process has proven itself: soak the crucibles for at least 24 hours in aqua regia (3 parts concentrated hydrochloric acid and 1 part concentrated nitric acid) and boil for 3 hours in this solution (aqua regia dissolution).
What is a crucible in literature?
A crucible is a severe test or trial or an extremely challenging experience. This figurative sense of crucible is based on the literal meaning of the word: a heat-resistant container used to melt metals. The word is perhaps best known from its use as the title of the 1953 play The Crucible by Arthur Miller.
How much does a porcelain crucible weigh?
Specifications for this item
| Brand Name | Avogadro’s |
|---|---|
| Ean | 0683203916912 |
| Item Weight | 6.0 ounces |
| Material | Porcelain |
| Model Number | 310-2 |
Is alumina crucible made of porcelain?
Crucibles and their covers are made of high temperature-resistant materials, usually porcelain, alumina or an inert metal. One of the earliest uses of platinum was to make crucibles. Ceramics such as alumina, zirconia, and especially magnesia will tolerate the highest temperatures.
How do you clean alumina tubes?
All Answers (3) What kind of material do you want to remove from the alumina tube? If these are organic compounds, tars or pyrolytic carbon, the safest way is just heating slowly the tube up to 1000°C in air and let the organic matter burn completely until you recover a nice, clean, white tube.
How do you clean ceramic alumina?
This is done by immersing the ceramic in a heated solvent (heating to increase activity) and then placing them inside an ultrasonic cleaner for at least 15 minutes. The solvent is then rinsed off using deionized or distilled water, which removes any loose contaminants from the surface.
What is The Crucible used for?
Used from ancient times as a container for melting or testing metals, crucibles were probably so named from the Latin word crux, “cross” or “trial.” Modern crucibles may be small laboratory utensils for conducting high-temperature chemical reactions and analyses or large industrial vessels for melting and calcining …
Why does a crucible need to be heated?
The empty crucible is heated to remove moisture and ensure that the crucible is completely dry as any water present may affect the reading.
What is isostatically pressed alumina crucible?
Dyson Technical Ceramics™ Isostatically Pressed Alumina Crucibles offer resistance to high temperatures, while maintaining good erosion resistance. Dyson Technical Ceramics manufactures a range of crucibles based on Alumina. Categories: Aerospace, Biomedical, Automotive, Foundry, Glass, Investment Casting, Isostatically Pressed Crucibles, Steel.
What materials can be melted in an alumina crucible?
They are ideal for melting steel; cobalt based alloys, nickel, chromium and manganese alloys, as well as iron. Our high temperature alumina crucibles are manufactured in sizes up to 4000# and can be constructed to your specific needs both in size and in material selection to maximize chemical attack.
What is the difference between TGA Crucible and alumina crucible?
Alumina crucibles are normally used for TGA measurements. These crucibles can be reused. Standard TGA crucible are used up to 1600 °C and are available for different sample volumes. Detailed information: The 600 uL crucible is manufactured from a special alumina.
Why choose high temperature alumina induction Crucible?
Our high temperature alumina crucibles are manufactured in sizes up to 4000# and can be constructed to your specific needs both in size and in material selection to maximize chemical attack. Our alumina induction crucibles offer increased resistance to saturation, erosion and thermal shock allowing less slag build up and longer life.