Alumina Crucibles
The crucibles are made from high purity Alumina (Al2O3) (99.7%). Alumina possesses a high melting
point, strong hardness, and good chemical stability. It has found use in a range of high temperature
applications such as metal processing / molten glass, rapid thermal cycling, gemstone purification
for jewelry industry, alkaline electrolysis, elevated chemical process, etc.
| Catalogue Number | Approx. Capacity (ml) | Top Diameter (mm) | Bottom Diameter (mm) | Height (mm) | Price |
| MD-1005 | 5 | 25 | 15 | 28 | $10.75 |
| MD-1010 | 10 | 29 | 18 | 34 | $12.59 |
| MD-1020 | 20 | 35 | 24 | 42 | $15.97 |
| MD-1050 | 50 | 48 | 30 | 54 | $20.67 |
| MD-1100 | 100 | 58 | 35 | 68 | $25.84 |
| MD-1150 | 150 | 66 | 40 | 80 | $32.69 |
| MD-1250 | 250 | 79 | 42 | 93 | $40.40 |
| MD-1500 | 500 | 100 | 60 | 116 | $60.23 |
| MD-1750 | 750 | 112 | 70 | 132 | $80.68 |
| MD-11000 | 1000 | 125 | 82 | 148 | $102.28 |
| Catalogue Number | Approx. Capacity (ml) | Diameter (mm) | Height (mm) | Price |
| MD-2005 | 5 | 19 | 26 | $12.75 |
| MD-2010A | 10 | 25 | 25 | $13.59 |
| MD-2010B | 10 | 22 | 33 | $13.59 |
| MD-2050 | 50 | 45 | 35 | $19.67 |
| MD-2100 | 100 | 40 | 95 | $24.84 |
| MD-2250 | 250 | 60 | 100 | $36.40 |
| MD-2500 | 500 | 72 | 148 | $60.23 |
Property:
Purity: ≥ 99.7 %
Density: 3.85 g/cm3
Compressive Strength: 2500 Mpa
Flexural Strength: 360 Mpa
Thermal Shock: good
Max service temperature: 1750°C (3182°F)
Storage:
Alumina crucibles should be stored in a dry place. If they get wet, let the crucible dry naturally
before using them. If crucible is dried by placing in a dryer or an oven, please make sure that the
dry process goes slowly.
Use Instruction:
Alumina crucibles are fragile. Please handle them carefully and avoid collision during unpacking,
transportation, handling and cleaning.
Before use:
Before using alumina crucibles, check them if any cracks exist. Crucibles with cracks should not be used.
Material Load:
Load a appropriate amount of materials in alumina crucibles. Too many materials can increase the possibility of uneven heating.
Heating:
Alumina crucibles are sensitive to thermal shock. Try to warm up a furnace chamber slowly. A heating
rate between 150°C ~ 300°C/hour is recommended for the first 1-1.5 hours so that the crucibles can be
evenly heated to reduce the impact of thermal shock. It should take about 3 hours to reach the desired
high temperature.
Cooling:
To lower the temperature as gradually as possible. The cooling down rate should be half of the heating
rate. If possible, arrange for consecutive heating of furnace to maintain a hot crucible. If taking
the crucibles out of furnace into room temperature to pour the melted material, try to control the
process as short as possible.