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Ferro-Ceramic Grinding Inc. machines over 15 different materials

Boron Nitride

Boron Nitride Properties
Boron Nitride BN is made using a hot pressing process, and comes as a lubricious white solid. 

Boron Nitride Properties

Boron Nitride

BN is made using a hot pressing process, and comes as a lubricious white solid.  It can be machined using standard carbide drills.  Due to crystal stucture, BN is anisotropic electrically and mechanically. BN exhibits a high electrical resistance, low dielectric constant and loss tangent, low thermal expansion, chemical inertness, and good thermal shock resistance.

There are several different purity levels for this material.  All offer very high thermal conductivity and stability in inert and reducing atmospheres up to 2800°C, and in 850°C in oxidizing environments.

Typical uses include vacuum components, low friction seals, various electronic parts, nuclear applications, and plasma arc insulators.

  

Properties
Units
Test
Value
Physical
Chemical Formula
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C
Density, r
g/cm3
ASTM C20
2.25
Color
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black
Crystal Structure
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hexagonal
Water Absorption
% @R.T.
ASTM C373
0.5 - 3.0
Hardness
Moh's
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1.0 - 1.5
Hardness
knoop (kg/mm2)
Knoop 100g
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Mechanical
Compressive Strength
MPa @ R.T.
ASTM C773
96
Tensile Strength
MPa @ R.T.
ACMA Test #4
4.8
Modulus of Elasticity
(Young's Mod.)
GPa
ASTM C848
4.8
Flexural Strength (MOR)
MPa @ R.T.
ASTM F417
50
Poisson's Ratio, u
-
ASTM C818
--
Fracture Toughness, KIc
MPa x m1/2
Notched Beam Test
--
Thermal
Max. Use Temperature
(* denotes inert atm.)
șC
No load cond.
3650 *
Thermal Shock Resistance
DT (șC)
Quenching
200 - 250
Thermal Conductivity
W/m-K @ R.T.
ASTM C408
24
Coefficient of Linear Thermal Expansion, al
mm/m-șC (~25șC through ±1000șC)
ASTM C372
8.39
Specific Heat, cp
cal/g-șC @ R.T.
ASTM C351
0.16
Electrical
Dielectric Constant
1MHz @ R.T.
ASTM D150
--
Dielectric Strength
kV/mm
ASTM D116
--
Electrical Resistivity
Wcm @ R.T.
ASTM D1829
7 x 10-3
 
 
*Although we have no reason to doubt the accuracy of the data presented, Ferro-Ceramic Grinding Inc. offers this information for comparison only, and disclaims any and all liability from error, omissions or inaccuracies, such that it does not constitute a warranty or representation for which we shall assume legal responsibility.