BORON NITRIDE GRADE ZSBN TUBES

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 ¡ãC
Resistivity		>1012 ¦¸¡¤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¡ª2.2 g/cm3
Chemical Composition	B+N	99.5%
	Oxygen Content	<0.4%
	Carbon Content	<0.02%
Working Environment Temperature	Oxidizing Atmosphere	850¡ãC
	Vacuum	1800¡ãC
	Inertia	2300¡ãC

Processing Methods: