Ceramic PBN Pyrolytic Boron Nitride Plate,Rod And Crucible Etc.

Specifications Ceramic PBN Pyrolytic Boron Nitride Parts

1.Purity up to 99.99%,dense surface,air tightness

2.High temperature strength

The Professional Manufacturer For PBN Since Year 1980,The No.1 Exporter:  Ceramic Pyrolytic Boron Nitride PBN Plate,Crucible,Rod,Parts,The High Technology production & steady quality! Accept Customized Designs & Dimensions!   Product Overview: Pyrolytic boron nitride (PBN) is a special ceramic material, obtained from special equipment by using chemical vapor deposition process. The pyrolytic boron nitride deposition process, like a "snow": hexagonal boron nitride snow sheet parallel to falls, to a piece of graphite base material, and reaches a certain thickness, the final cooling demolding made.   Main features: 1.Color ivory white to orange-brown, non-toxic, non-porous, easy to process.  2.Purity up to 99.99%, dense surface, air tightness.  3.High temperature strength with increasing temperature, 2200 °C reaches the maximum value.  4.Acid, alkali, salt and organic reagents, high temperature, and the vast majority of the molten metal, semiconductor material is not moist, not reaction.  5 Good thermal shock resistance, good thermal conductivity, low thermal expansion coefficient.  6 High resistance, high dielectric strength, a small dielectric constant, and low magnetic loss tangent, and having a good permeability of microwave and infrared properties.  7. Performance of the mechanical, thermal, electrical, and so there is a clear anisotropy.   The main parameters:

Performance		Unit	Index
Lattice constant		μ m	a:2.504×10-10     c:6.692×10-10
Apparent density		g/cm3	2.0-2.19
Microhardness (Knoop) (ab plane)		N/mm2	691.88
Volume resistivity		Ω·cm	3.11×1011
Tensile strength (|| “C”)		N/mm2	153.86
Bending strength	(|| “C”)	N/mm2	243.63
	(⊥“C”)	N/mm2	197.76
Modulus of elasticity		N/mm2	235690
Thermal conductivity		W/m·k	“a”direction   “c”direction
	(200°C)	W/m·k	60           2.60
	(900°C)	W/m·k	43.70       2.80
Dielectric strength (room temperature)		KV/mm	56

  Applications: Heater, to prevent the generation of impurities in the semiconductor material manufacturing equipment, in order to improve the purity.   Overview: