Precision Ceramics USA

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 511 West Bay Street, Suite 350, Tampa, FL 33606

 
           
           
  Boron Nitride - Grades M & M26  

Boron nitride components engineered by Precision Ceramics USA are ideal for high temperature runner systems in hot metal casting
 
 

Solid Boron Nitride Grade M is a truly hydrophobic advanced ceramic. Composed of boron nitride and silica, it is completely resistant to moisture and has a MIL-I-10A grade of L542, a test requiring immersion in water for 48 hours prior to testing at elevated frequencies. Grade M is suitable for the most severe electrical applications. It is an excellent refractory material at temperatures up to 1400°C, and is unparalleled in resistance to thermal shock.

 

Applications 

  • High temperature electrical insulators and vacuum furnace supports which require electrical resistivity, high temperature strength, thermal shock resistance and low chemical resistivity

  • Crucibles and containers for high purity molten metals

  • Tools and refractories for glass forming which provide non-wetting, non-B2O3 containing contacts

  • Radar components and antenna windows which require exacting electrical and thermal properties

Typical Properties

Typical Chemical Analysis

Grade M

Grade M26
Boron1

18-20.25%

26.5-28.7%
Nitrogen 1

22.5-25.5%

32.8-35%
Oxygen2

-

-
Calcium1

.01%3

.01%3
Silica (SiO2)1

60%

40%1
Other Inorganic1

.02%

.05%
Trace Metals

.05%

.05%
TOTAL

100%

100%
B2O3*

.2%

.2%

 

*B2O3 is given for clarification and is not part of the elemental analysis

 1 Wet Chemistry - 2 LECO Oxygen - 3 Optical Emission Spectroscopy

 

Typical Physical Properties

Typical Physical Properties

Grade M

Grade M26
Percent BN: 40 60
Percent SiO2: 60 40
  Parallel       Perpendicular Parallel       Perpendicular
Volume Resistivity (ohm-cm) @ RT:
  @150°C:		 1.7 x 1015        5.1 x 1015
2.4 x 1013        3.3 x 1013		 6.4 x 1014        2.9 x 1015
2.4 x 1013        8.5 x 1013
Dielectric Constant (@ IMHz) @RT:
  microware frequency: @ RT, 8.8 GHz:		 4.21                      3.87
3.86                      4.08		 4.48                     3.89
3.89                     4.28
Dieletric Strength: volts/mil & (volts/mm)  
  Sample thickness: 10 mil.
  Tested up to 25kV)  25 mil		 1670 (65748)
>1000 (>39370)		 1690 (66535)
>1000 (39370)
Dissipation Factor (Loss tangent)  
  @RT @ 1 MHz
  @150°C @ 1 MHz
  @RT @ 8.8 GHz		 .0016                   .0035
.0017                   .0055
.0011                   .0005		 .0017                   .0061
.0094                   .0062
.0039                   .0006
Loss Factor
  @RT @ 1 MHz
  @150°C @ 1 MHz
  @RT @ 8.8 GHz
.0067                   .0140
.0077                   .0230
.0042                   .0020
.0076                   .0230
.0440                   .0250
.0150                   .0260
Surface Resistivity (ohms/ )@ RT
  @150°C		 8.5 x 1016
1.4 x 1015		 4.2 x 1016
1.5 x 1015

 

Please click on one of the links below, to view further information on our Boron Nitride product range.

 

  Boron Nitride - General Information

  Solid Boron Nitride - Grade A

  Solid Boron Nitride - Grade AX05

  Solid Boron Nitride - Grade HP

  Solid Boron Nitride - Grade ZSBN

  Boron Nitride Coatings

  Boron Nitride Industrial Powders

  Boron Nitride Aerosol Sprays

    
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