Alumina ceramic crucible is widely used in experimental analysis for its excellent performance, and satisfactory lifespan. However, to ensure the performance and lifespan of a crucible, it is very important to hand, operate and maintain it correctly, so i/n the current article, a care guideline of alumina ceramic crucible will be introduced for users.  

Although crucible is fabricated with strict quality control and carefully packed, however very occasional damage may still happen during transportation. When crucibles are received, it’s necessary to inspect them carefully for cracks so to avoid using a damaged one. If any of them are damaged during transportation, then contact the supplier for replacement.

Never stack crucible with another one, since which may lead to cracking. Alumina crucible is fragile, so it’s necessary to handle them carefully.

It is recommended to keep at least 25mm distance from the heating source. Without adequate space between crucible and top and sides of the furnace, the crucible expands during the heating process, which may lead to cracking.

Make sure that the alumina ceramic crucible is completely dried before use. If it’s still wet, let it dry naturally or in a dryer at a low drying process.

Do not load too many materials in alumina ceramic crucible, which will increase the possibility of uneven heating.

Lower the temperature as gradually as possible when finish using, and keep the cooling down rate at half of heating rate, also be noted that heated alumina products contact with a cold surface should be avoided. 

Every crucible has a maximum temperature limit depending on the material. Exceeding the maximum temperature will damage the crucible, so it is important to control the temperature of crucible carefully. For alumina ceramic crucibles, maximum temperature limit is 1750°C

Although 99.7 % Al2O3 does not react with most acids, chemicals or reagents, it may form low-temperature eutectic compounds with element of Bismuth, Lead, Silicon, Tin, Antimony and rare earth. So note that do not to use the alumina ceramic crucible for heat treatment of eutectic compound.