Why choose alumina products?
High purity alumina products can withstand very high temperature under
reducing, inert or high vacuum condition. They remain good chemical resistance
under high temperatures, and have excellent wear and abrasion resistance. What's
the highest temperature that 99.6% alumina products can withstand? Alumina
products can withstand up to 1750°C (3182°F). What's the chemical composition
of your alumina products?
 What
are the engineering properties of your alumina products?
How
to store alumina products?Alumina products should be stored in a dry place.
If they get wet, let the crucible or tube dry naturally before using them. If
dry crucibles by placing in a dryer or oven, make sure that the dry process goes
slowly. What should I pay attention to when I use alumina products?-
Alumina products are fragile. Please handle them carefully and avoid collision
during unpacking, transportation, handling and cleaning.
- Check whether
any micro-cracks exist before using alumina products. Products with micro-cracks
should not be used.
- Do not load too many materials in alumina crucibles,
which can increase the possibility of uneven heating.
- Alumina crucibles
are sensitive to thermal shock. Try to warm up the 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 usually takes about 3 hours to increase to high temperature.
- Lower
the temperature as gradually as possible. The cooling down rate is often 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.
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