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Hexagonal Boron Nitride Powder (HBN)

 

 

Particle Size D50: -10um

 

Chemistry SPEC
TYP
BN 99.0 Min 99.1
B2O3 - .18
Free B - .16
NaO2 < 0.1 .07
Fe2O3 < 0.07 .05
CaO < 0.07 .055
MgO < 0.01 .006
Al2O3 < 0.05 .01
TiO2 < 0.005 .001

 

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
Mohs
-
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(1000ºC)
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