Boron Nitride has the highest operating temperature in inert gas and vacuum environment. It has excellent electrical insulation, high thermal conductivity, low thermal expansion coefficient, excellent thermal shock resistance, it is usually used for electrical insulating components for vaccum furnace. It can be used as metal smelting crucibles because it will not react with most molten metals. Moreover, Boron Nitride can be quickly machined into high accuracy components by the normal mechanical machining methods.  

Main Advantages:

• Excellent thermal shock resistance 
• High electrical resistivity
• Low density
• High thermal conductivity
• Corrosion resistant
• Good chemical inertness
• High working temperature
• Low coefficient of friction
• Non-wetting (without oxidization)
• High dielectric breakdown strength
• Easy to machine with normal metal tools

 

Technical details:

Material Type		BN-99	BN + Ca	BN + Al2O3	BN + ZrO2	BN + AlN
Binder		B2O3	CaB2O4	AlBO3	B2O3	AlBO3
Density (g/cm3)		1.95-2.0	2.0-2.1	2.25-2.35	2.9-3.0	2.5-2.6
Flexural Strength (Mpa)		30	35	85	120	110
Compressive Strength (Mpa)		58	70	150	200	185
Electrical Resistivity (Ω.Cm)		>1014	>1013	>1012	>1012	>1013
Max Working Temperature(℃)	Air	900	900	1000	1000	1000
	Inert gas	2100	2100	1700	1800	1800
	Vacuum	1900	1900	1700	1800	1800
Thermal Conductivity (W/mk)		30	32	35	30	55
Thermal Expansion Coefficient  (25 - 1000℃) (10-6/k)		1.5	1.6	1.9	6.0	3.0
Typical Application		High Tempereture Furnace	High Temperature Furnace	Powder Metallurgy	Metal Casting	High Temperature Equipment

Typical Applications of 99% Boron Nitride:

1. Heat treatment fixtures
2. Nozzles for transfer or atomization
3. High temperature or high voltage electrical insulators
4. Vacuum furnace supporters which require electrical resistivity
5. Crucibles or containers for high purity molten metals
6. Break rings for continuous casting of metals

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