Bayville Chemical Supply Company Inc 70-G East Jefryn Boulevard Deer Park, New York, 11729 USA Telephone: 631-586-4309 Fax: 631-254-5591 E-Mail: info@bayvillechemical.net
Bayville Chemical Supply Company Inc70-G East Jefryn BoulevardDeer Park, New York, 11729  USA           Telephone: 631-586-4309      Fax: 631-254-5591      E-Mail: info@bayvillechemical.net

Boron Nitride

Boron Nitride High Grade and Regular Grade is available in solid ceramic forms such as block, plate, rod and bars.  (For powders see our "S" grade listing.)

High Grade

High Grade Boron Nitride is Hexagonal in structure.  It is a diffusion bonded ceramic, which does not depend on a Boron Oxide binder for mechanical integrity.

 

Typical Properties:

Binder

None

Maximum Use Temperature in Oxidizing Atmosphere

850oC

Maximum Use Temperature in Inert Atmosphere

3000oC

Specific Heat at 700oC

0.35 J/goC

Dielectric Strength

2000 V/mil

Pressing Direction

Parallel

Volume Resistivity at RT

> 1014 Ohm cm

Loss Tangent at 8.8 GHz

0.0012

Dielectric Constant at RT

4.0

Thermal Conductivity at 25oC

40.0 W/m/K

Thermal Conductivity at 1500oC

14.0 W/m/K

Thermal Expansion Coefficient RT to 1500oC

1.0 x10-6 in/in/oC

Flexural Strength at 25oC

2600 psi

Flexural Strength at 1500oC

6200 psi

Pressing Direction

Perpendicular

Volume Resistivity at RT

> 1015 Ohm cm

Loss Tangent at 8.8 GHz

0.0003

Dielectric Constant at RT

4.0

Thermal Conductivity at 25oC

65.0 W/m/K

Thermal Conductivity at 1500oC

22.0 W/m/K

Thermal Expansion Coefficient RT to 1500oC

0.3 x10-6 in/in/oC

Flexural Strength at 25oC

3100 psi

Flexural Strength at 1500oC

11000 psi

Percentage Open Porosity

12.57%

Density (minimum)

1.91 g/cc

Oxygen

0.3 - 0.4%

Carbon

0.01 - 0.03%

Calcium

0.03 - 0.05%

Other Impurities

0.05% maximum

 

Chemically, High Grade Boron Nitride is inert and not wetted by most molten materials such as glasses, metals, halide salts and many other reagents.

 

Mechanically, High Grade Boron Nitride has an increased strength as compared to temperature.  This feature offers higher temperature performance to applications previously unobtainable with boron nitrides, which are boron oxide bonded.

 

Thermally, High Grade Boron Nitride has minimal thermal expansion; high thermal conductivity and an operating range approaching 3000oC.  The thermal shock stability is excellent over a wide range of use temperatures.

 

Electronically, High Grade Boron Nitride is transparent to microwave energy.  It has high Resistivity and high dielectric strength with a low loss tangent and dielectric constant.

 

Additionally High Grade Boron Nitride is non-toxic, easily machined and has no moisture pick-up and non-outgassing characteristics.

 

Boron Nitride

Regular Grade

Typical Properties:

Binder

Boric Oxide

Binder Melting Point

550oC

Maximum Use Temperature in Oxidizing Atmosphere

850oC

Maximum Use Temperature in Inert Atmosphere

1800oC

Specific Heat at 700oC

1.610 J/goC

Hardness (Knoop)

15.51 - 24.19 kg/mm2

Dielectric Strength

2400 V/mil

Pressing Direction

Parallel

Volume Resistivity at RT

> 1014 Ohm cm

Loss Tangent at 8.8 GHz

0.0017

Dielectric Constant at RT

4.58

Thermal Conductivity at 25oC

30.13 W/m/K

Thermal Expansion Coefficient RT to 1500oC

11.85 x10-6 in/in/oC

Flexural Strength at 25oC

11000 psi

Flexural Strength at 1500oC

900 psi

Pressing Direction

Perpendicular

Volume Resistivity at RT

> 1015 Ohm cm

Loss Tangent at 8.8 GHz

0.0005

Dielectric Constant at RT

4.15

Thermal Conductivity at 25oC

33.71 W/m/K

Thermal Expansion Coefficient RT to 1500oC

3.12 x10-6 in/in/oC

Flexural Strength at 25oC

16400 psi

Flexural Strength at 1500oC

1380 psi

Percentage Open Porosity

2.84%

Density (minimum)

1.92 g/cc

Oxygen

3.0 - 5.0%

Carbon

0.01 - 0.03%

Calcium

0.1 - 0.2%

Boric Oxide

4.0 - 5.0%

Other Impurities

0.2% maximum

 

Boron Nitride, Regular or High Grade, is available as rods, bars, block and plate.  Additionally Boron Nitride can be fabricated into many custom shapes.  Please contact your sales representative for pricing and your custom quotations.

 

Where to Find Us:

Bayville Chemical
70 East Jefryn Boulevard
Suite G
Deer Park, NY 11729


Phone: 631 586-4309

What's New

New larger location

As of August 2014, we have moved to this new, larger, modern facility to better service your needs.

 



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