BN Boron Nitride Ceramic Crucible
The use temperature of boron nitride ceramic crucible in vacuum is 1800 degrees, and the use temperature under atmosphere protection is 2100 degrees. Nitrogen or argon atmosphere is the best and has the longest life. The boron nitride crucible is resistant to thermal shock, and will not crack when it is rapidly cooled at 1500 degrees. It will not crack if it is taken out of the furnace at 1000 degrees for 20 minutes and blow and quenched for hundreds of times.