BN type, AlN type, Porous Machinable Ceramics

We offer a wide assortment of machinable ceramics including BN, AlN type, and porous machinable ceramics.
Each materials has unique characteristics in addition to excellent machinability.

BN (Boron nitride) type

BN HC / BN N-1

Hexagonal Boron Nitride has excellent thermal resistance properties in inert atmosphere.
Excellent thermal shock strength and insulation properties at high temperature.
Inactive against melted metal and molten glass.

SBN

Composite materials of BN and silicon nitride.
Better mechanical strength and wear resistant properties than BN.

AlN (Aluminum nitride) type

SHAPAL Hi Msoft

Composite materials of Aluminum nitride and BN.
High thermal conductivity and mechanical strength.

Porous

MACHINAX

 Porous machinable ceramics.

ALMATITE

Very low thermal expansion coefficient and high thermal shock resistance properties.
Inactive against melted metal.

Material characteristics

Classification BN (Boron nitride) type AlN (Aluminum nitride) type Porous
Code BN HC BN N-1 SBN SHAPAL Hi Msoft MACHINAX ALMATITE
Composition Hexagonal BN Hexagonal BN BN-Si3N4 AlN-BN CaSiO3 Al2TiO3
Color white white light grey light grey white grey
Bulk Density g/cm3 2.00 1.80 2.50 2.88 2.10 3.30
Water Adsorption Ratio % 0.4 0.04 - 0 10 1.8
Flexural Strength MPa 35 30 270 300 50 10
Compressive Strength MPa 50 20 - 100 250 150
Young's Modulus GPa 20 10 80 177 52 -
Poisson's Ratio - - - - 0.31 - -
Hardness GPa 1.3 0.8 5.5 3.7 2.6 1.5
Fracture Toughness MPa・m1/2 - - - - - -
Electrical Resistivity (RT) Ω・cm >1015 >1015 >1014 >1015 >109 >1012
Dielectric Constant [1MHz] - 4 4.5 6.3 6.8 5 13
Dielectric Loss (tanδ)[1MHz] - 0.0008 0.0009 0.0053 0.001 0.012 0.007
Dielectric Strength kV/mm 20 19 - 65 10 7
Max. Useable Temperature 1800※1 2200※1 1700※1 1900※1 900※2 900※2
Thermal Expansion Coefficient (RT) ×10-6/℃ - - - - - -
Thermal Expansion Coefficient (RT-400℃) ×10-6/℃ -0.2 -1.8 2.1 4.8 7.0 -2.1
Thermal Expansion Coefficient (RT-800℃) ×10-6/℃ -0.1 -1.2 2.4 5.0 7.5 -0.9
Thermal Conductivity (RT) W/(m・K) 36 63 47 92 1.6 1.5
Specific Heat (RT) J/(g・K) 0.7 0.8 0.7 - 0.8 0.8
Thermal Shock Resistance ⊿T 1500※1 1500※1 1500※1 400 250 900
Remarks Denka Co., Ltd. Tokuyama Corp.
  • ※1 non-oxidative atmosphere
  • ※2 oxidative atmosphere/no visual change in appearance

* The data indicated herein is representative values and not guaranteed values.

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