|Melting Point||2973 °C|
|Density||2.1 g/cm3 (h-BN); 3.45 g/cm3 (c-BN)|
|Solubility in H2O||Insoluble|
|Refractive Index||1.8 (h-BN); 2.1 (c-BN)|
|Electrical Resistivity||13 to 15 10x Ω-m|
The boron nitride crucible is usually composed of boron nitride, or BN, which is a chemical compound with equal numbers of boron and nitrogen atoms. The hexagonal boron nitride (HBN) corresponding to graphite is the softest and most stable form among BN polymorphs, and is therefore used as lubricant and an additive to cosmetic products. The cubic (CBN) variety analogous to diamond has high hardness which is inferior only to diamond. The rare wurtzite BN (WBN) modification is similar to lonsdaleite, and it may even be harder than CBN.
|BN99||Hot pressed at high temperature (1900℃).
Excellent corrosion resistance and thermal conductivity. Limited wear resistance
Self-bonded and high purity(>99%)
|BNBO||General purpose material
Bonded by boric oxide
|BNCB||Calcium borate bonded boron nitride
Enhanced moisture resistance
|BN60||BN 60%, SiO2 40%||Finished Parts|
|BN40||BN 40%, SiO2 60%||Finished Parts|
|ZSBN||BN-45%, Zr2O3 45%||Finished Parts|
Specifications of BN99 and ZSBN for your reference!
– Low wetability to molten metal
– Relatively high thermal conductivity with low thermal expansion
– Relatively high thermal shock resistance
– Extremely high working temperature with proper inert gas protection (>3000C has been recorded).
The high quality Boron Nitride ceramic from Advanced Ceramic Materials (ACM) can withstand high temperature in the high vacuum environment, plus it has excellent corrosion resistance and electrical resistance. Thus, Boron Nitride ceramic product is an ideal choice in a wide range of industries, such as:
– Crucibles for crystal growth
– Break rings for horizontal casting machine
– Insulators for high temperature furnace
– Electric insulators in vacuum system
– Feed through for high voltage equipment
ACM’s Boron Nitride Crucible is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
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I highly recommend ACM's bn products especially because they offer the boron nitride ceramics of good quality. Will buy again.