Pyrolytic Boron Nitride Tube

As the professional manufacture, we would like to provide you high quality Nextgen Pyrolytic Boron Nitride Tube. And we will offer you the best after-sale service and timely delivery. Compared with normal boron nitride ceramic, pyrolytic boron nitride (PBN) has a much better purity level. PBN tubes and other pyrolytic boron nitride products are synthesized on the mold by chemical vapor deposition (CVD) process, with BCl3 and NH3 at high temperature and low pressure. The PBN products are extremely pure, as the purity of vapor is easier to be controlled. Most PBN products made from the CVD process have a total impurity of less than 100 ppm, which means the purity is better than 99.99%. With such a high purity level, PBN crucibles are ideal products for semiconductor industries.

Pyrolytic Boron Nitride Specification

Item		Unit	Value
Lattice constant		μ m	a:2.504×10-10
			c:6.692×10-10
Density		g/cm3	2.0-2.19
Resistivity		Ω·cm	3.11×1011
Tensile strength (ab)		N/mm2	153.86
Bend strength	c	N/mm2	243.63
	ab	N/mm2	197.76
Elastic modulus		N/mm2	235690
Thermo conductivity			“a” direction	“c” direction
	(200℃)	W/m·k	60	2.6
	(900℃)	W/m·k	43.7	2.8
Dielectric strength (at RT)		KV/mm	56

PBN Tube Properties

Item	Parameter
Compound Formula	BN
Molecular Weight	24.82
Appearance	White
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