How to maintain the corundum crucible?

In the process of using the corundum crucible, we must pay attention to daily maintenance, otherwise the impurities are difficult to remove, and it is inevitable to replace it with another one. The maintenance of the corundum crucible must first pay attention to the limitations of use. Do not use the corundum crucible to sinter the strong For samples with alkali and strong acid as flux, do not heat up too suddenly during use to avoid rapid heat and damage the corundum crucible. Different box-type resistance furnaces require different corundum crucible styles. Choose the appropriate corundum crucible when choosing.