High Pure MAX.99.99% PBN Pyrolytic Boron Nitride Ceramic ring

PBN Coating Pyrolytic Boron Nitride Ceramic

1.Purity up to 99.99%,dense surface,air tightness
2.High temperature strength

PBN is high purity (99.995%) technical ceramic,deposited into free-standing shapes (crucibles) and coatings on graphite using a Chemical Vapor Deposition (CVD) process. Crystal structure of this non-toxic ceramic is such that it exhibits a high degree of thermal anisotropy favorable for crystal growth and other applications.

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Product Details

PRODUCT INTRODUCTION

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.

APPLICATION

1) Electronic Parts - heat sinks, substrates, coil forms, prototypes

2) Boron doping wafers in silicon semiconductor processing

3) Vacuum melting crucibles

4) High precision sealing, brazing, and metallizing fixtures

5) Microwave tubes

6) Horizonatal caster break rings

7) Low friction seals

8) Plasma arc insulators

9) High temperature furnace fixtures and supports

Item:	Pyrolytic Boron Nitride (PBN) Ceramic ring
Process Type:	deposition process
Material:	Pyrolytic Boron Nitride (PBN)
Tolerance:	+-1mm
Facility:	Automatic molding equipment
Certificates:	ISO 9001 SGS
Shipping:	Many stocks , delivery time around 5-10days . by sea or by air as customer request
Delivery & Service:	Timely delivery each time. Provide reliable service and responsible for each customer with each product. Our target is to satisfy every customer with the best service.

CHEMICAL COMPOSITION

Item	Unit
Apparent Density	g/cm3	2.15-2.19
Gas permeability(He)	cm3/s	<1*10-10
Micro hardness(Knoop)	N/mm2	691.88(a-b plane)
Tensile strength	N/mm2	153.86(parallel)
Bending strength	N/mm2	243.63(parallel)	197.76(parallel)
Modulus of elasticity	N/mm2	235690
Specific heat capacity	Cal/g.℃	0.371(@ 200℃)	0.442(@ 900℃)
Thermal conductivity 200℃	W/cm.k	0.6(parallel)	0.026(perpendicular)
Thermal conductivity 900℃	W/cm.k	0.4370(parallel)	0.028(perpendicular)
Dielectric Strength(RT)	KV/mm	56
Volume Resistivity	Cm	3.11*1011

MATERIAL INTRODUCTION

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.

OUR ADVANTAGE

XTL have 7000 square meters work shop

Automatic production line

Longer working life

Reasonable price

All prototype products have to go through 4 checks in the whole process:
1. Raw material inspection
2. In processing inspection
3. Final inspection
4. Outgoing inspection

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PBN ceramic (pyrolytic boron nitride, pyrolytic BN) is a kind of advanced ceramic, can be produced with 99.99% purity by the forming method of chemical vapour deposition (CVD), no need to go through the traditional hot pressing sintering process. PBN ceramic has high purity, chemical inertness, thermal stability, low outgassing, non-wetting characteristics, and long lifetime, it is the ideal material for furnace, electrical, microwave, and semiconductor components.

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