6.25" L x 0.250 OD x HIGH PURITY BORON NITRIDE ROD CARBORUNDUM HP GRADE No.: 215

Description

6.25” LONG X 0.250" O.D. HIGH PURITY BORON NITRIDE ROD REFRACTORY
No.: 215
The specifications for these components are as follows:
Outside Diameter:
Average approximately 0.250” +0.010/ -0.000"
Length:
Average Approximately 6
.25” +0.000/-0.020
You are buying one (1) each of a  6.25” Long x  0.250" O.D High Purity Boron Nitride Rod.
They are in excellent condition being NS (New Stock). They are 6.250" Long.
They are longer than 66" to provide the necessary kerf allowance when cutting them to shorter lengths.
They are made from 98+ purity Boron Nitride (BN
)
These rods are hot pressed to full density. They are devoid of porosity.
Boron Nitride Applications
·
Break rings for continuous casting of metals
·
Break rings for continuous casting of metals
·
Heat treatment fixtures
·
High temperature lubricant
·
Molds/mold release agent
·
Molten metals and glass casting
·
Nozzles for transfer or atomization
·
Laser nozzles
·
Nuclear shielding
·
Induction heating coil supports
·
Spacers
·
High-temperature & high-voltage electrical insulators
·
Furnace supports which require electrical resistivity
·
Crucibles and containers for high purity molten metals
·
Radar components and antenna windows
·
Ion thruster discharge channels
Boron Nitride for Thermal Management of Electronic Devices
Boron Nitride is one of the few materials that offers electrical insulation and high thermal conductivity. This makes BN extremely useful in high power electronic applications in heat sink and heat spreader applications. Other materials that are commonly used are Aluminum Nitride, Beryllium Oxide, and sometimes Alumina – however, all of these materials are significantly more difficult to machine into intricate shapes.
Boron Nitride Machining
Hexagonal Boron Nitride can be machined into highly complex geometries with tight tolerances.
The specifications for these components are as follows:
Outside Diameter:
Average approximately 0.250” +0.010/ -0.000"
Length:
Average Approximately 6
.25” +0.000/-0.020
Please Note:
These are not precision technical ceramic components. There is no warp or camber Specification for this item. However they are relatively straight and round.
Technical Boron Nitride Properties
Properties
Units
Hexagonal BN Grades
HP
AX05
M26
ZSBN
Crystaline Phase
Hexagonal BN
Hexagonal BN >99%
BN - 40%, SiO2 - 60%
BN - 45%, ZrO2 - 45%, Borosilicate Glass <10%
Binder Type
Calcium Borate
Self Bonded
SiO2
Borosilicate
Color
White
White
White
Grey
* Pressing Direction
Parallel / Perp.
II
┴
II
┴
II
┴
II
┴
Mechanical Properties
Density
g/cm3
2
1.9
2.1
2.9
Flexural Strength
MPa
59
45
22
21
62
34
144
107
Youngs Modulus
Gpa
40
60
17
71
0
218.7
253.8
Compressive Strength
MPa
96
25
0
218.7
253.8
Hardness Knoop
Kg/mm2
16
4
100
Thermal Properties
Thermal Conductivity at 25°C
W/mK
27
29
78
130
11
29
24
34
Max. Temp - Oxidizing/Inert
°C
850
1150
850
2000
1000+
850
Specific Heat at 25°C
j/gK
0.81
0.81
0.77
0.64
Coeff. Of Thermal Expansion (10-6)
25 - 400°C
0.6
0.4
-2.3
-0.7
3.0
0.4
4.1
3.4
400 - 800°C
1.1
0.8
-2.5
1.1
2.5
0.1
5.6
4.3
800 - 1200°C
1.5
0.9
1.6
0.4
3.0
0.1
7.2
5.2
1200 - 1600°C
2.8
2.7
0.9
0.3
4.6
3.4
1600 - 1900°C
0.5
0.9
Electrical Properties
Dielectric Constant at 1MHz
4.3
4.0
4.0
4.0
4.5
3.8
Dissipation Factor at 1MHz
E-03
1.5
2.1
1.2
3.0
1.7
6.7
Dielectric Strength
KV/mm
>10
79.0
66
>9
RT Resistivity
Ω cm
>10^13
>10^13
>10^13
>10^14
>10^13
>10^14
>10^14
>10^15
* Note – When solid
ride is hot pressed, the crystal structure of the material orients itself. This results in anisotropic physical and thermal properties; meaning they vary depending on the orientation of the material relative to hot pressing direction (parallel or perpendicular)
If you require a
dditional technical information, design, or application engineering consultation, feel free to contact us. As a materials scientist with four decades experience in high temperature processing, ceramics, dentistry, and jewelry manufacture it will be possible to provide you with creative and imaginative approaches to your requirements.
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No.: 215