Ceramic Properties Tables
Ferro-Ceramic Grinding Inc. machines over 15 different materials
Boron Nitride
Boron Nitride PropertiesBoron Nitride BN is made using a hot pressing process, and comes as a lubricious white solid.
If you have any problems viewing table, download image version
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
|
-
|
-
|
BN
|
Density, r
|
g/cm3
|
ASTM C20
|
2.28
|
Color
|
-
|
-
|
white
|
Crystal Structure
|
-
|
-
|
hexagonal
|
Water Absorption
|
% @R.T.
|
ASTM C373
|
0.0 - 1.0
|
Hardness
|
Moh's
|
-
|
2
|
Hardness
|
knoop (kg/mm2)
|
Knoop 100g
|
25-205
|
Mechanical
|
|||
Compressive Strength
|
MPa @ R.T.
|
ASTM C773
|
23.5
|
Tensile Strength
|
MPa @ R.T.
|
ACMA Test #4
|
2.41 (1000 ºC)
|
Modulus of Elasticity
(Young's Mod.) |
GPa
|
ASTM C848
|
675
|
Flexural Strength (MOR)
|
MPa @ R.T.
|
ASTM F417
|
51.8
|
Poisson's Ratio, u
|
-
|
ASTM C818
|
0.05
|
Fracture Toughness, KIc
|
MPa x m1/2
|
Notched Beam Test
|
2.6
|
Thermal
|
|||
Max. Use Temperature
(* denotes inert atm.) |
ºC
|
No load cond.
|
985
|
Thermal Shock Resistance
|
DT (ºC)
|
Quenching
|
> 1500
|
Thermal Conductivity
|
W/m-K @ R.T.
|
ASTM C408
|
20
|
Coefficient of Linear Thermal Expansion, al
|
mm/m-ºC (~25ºC
through ±1000ºC)
|
ASTM C372
|
1.0-2.0
|
Specific Heat, cp
|
cal/g-ºC @ R.T.
|
ASTM C351
|
0.19
|
Electrical
|
|||
Dielectric Constant
|
1MHz @ R.T.
|
ASTM D150
|
4.08
|
Dielectric Strength
|
kV/mm
|
ASTM D116
|
374
|
Electrical Resistivity
|
Wcm @ R.T.
|
ASTM D1829
|
1013
|
*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.