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   Item Name :

PBN Pyrolytic Boron Nitride Tube,Crucibl

PBN Pyrolytic Boron Nitride Tube,Crucibl
 
 
   Item No. : CS-224
   Product Category : Laboratory Porcelain
   Size : DIA:33mm*40mm*DIA18mm
   Hits : 931
   Chemical Analysis : Boron Nitride ≧99%
 
   Introduction :

PBN Pyrolytic Boron Nitride Tube,Crucible And Special Parts \manufacturer of PBN Pyrolytic Boron Nitride Tube,Crucible And Special Parts-cs ceramic co.,ltd  

 

Introduction:

Boron nitride is a white solid material in the as produced hot pressed form. It is a low porosity solid. It is easily machined into complex shapes using standard carbide tooling. The material is anisotropic in its electrical and mechanical properties due to the platy hexagonal crystals and their orientation during the hot press consolidation.

 

 

Key Boron Nitride Properties

 

1.High thermal conductivity

 

2.Low thermal expansion

 

3.Good thermal shock resistance

 

4.High electrical resistance

 

5.Low dielectric constant and loss tangent

 

6.Microwave transparency

 

7.Non toxic

 

8.Easily machined - non abrasive and lubricious

 

9.Chemically inert

 

10.Not wet by most molten metals

 

 

 

Typical Boron Nitridee Applications:

 

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

 

2.Boron doping wafers in silicon semiconductor processing

 

3.Vacuum melting crucibles

 

4.CVD crucibles

 

5.Microcircuit packaging

 

6.Sputtering targets

 

7.High precision sealing, brazing, and metallizing fixtures

 

8.Microwave tubes

 

9.Horizonatal caster break rings

 

10.Low friction seals

 

11.Plasma arc insulators

 

12.High temperature furnace fixtures and supports

 

 

  

 

 

Thermal Conductivity

(40-50)W/m·k

Thermal expansivity

(6.5-7.5)*10-6 °C

Resistivity

>1012 Ω·m

Puncture voltage

(2.5-4.0)*106 /kv·m

Mohs' hardnees

2

Dielectric constant

3.8-4.3

Bending strength

>35mpa

Compression strength

>200mpa

Density

1.9—2.2 g/cm3

Chemical Composition

B+N

99.5%

Oxygen Content

<0.4%

Carbon Content

<0.02%

Working Environment Temperature

Oxidizing Atmosphere

850°C

Vacuum

1800°C

Inertia

2300°C

 

Processing Methods: 

 

Manufacturing Options Advanced Finishing Services

Injection molding

Precision grinding and lapping
Roll compacting Laser machining
Extruding Engineering design and support
Co-firing Metallizing
Isostatic pressing Ceramic-to-metal brazing
Dry pressing Specialized coatings
Hot pressing Threaded components
Tape casting Precision motion components
Slip casting Complex clean room assemblies

Shipping:               We do international shipping for clients
                         
Special offer:      Most of our crucibles are produced to order, please mark clearly height, bottom diameter, top diameter, wall thickness and any special requirements i.e. lips etc. To speed up quotations please supply a drawing and if appropriate, the name of the system in which they are to be used.

 

 
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