Porous boron nitride industrial ceramic insulator washer ring

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porous boron nitride industrial ceramic washer ring
PBN Pyrolytic Boron Nitride round porous ceramic ring 2
porous boron nitride industrial ceramic washer ring
PBN Pyrolytic Boron Nitride round porous ceramic ring 2

Porous boron nitride industrial ceramic insulator washer ring

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Porous boron nitride industrial ceramic insulator washer ring

Boron nitride BN ceramic：

Boron Nitride (BN) is a white, low porosity refractory material with physical and mechanical properties similar to Graphite.
However, unlike Graphite, Boron Nitride has high thermal conductivity and good thermal shock performance. The most common formulation of Boron Nitride contains boric oxide, which can cause Boron Nitride to absorb moisture, resulting in swelling and property degradation.
Material Properties
ITEM
UNIT
BN-2000
BN-2300
BN-2800
BN-3000
Main Content
–
BN>99%
BN+Al2O3
BN+AlN
BN+ZrO2
Color
–
White
Light Grey
Dark Grey
Dark Grey
Density
g/cm3
1.95-2.00
2.25-2.35
2.75-2.85
2.90-3.00
Flexural Strength
Mpa
30
65
85
90
Compressive Strength
Mpa
55
145
205
220
Electrical Resistivity
Ω·cm
>1014
>1013
>1013
>1012
Max. Use Temp. (Air)
℃
900
1,000
1,000
1,000
Max. Use Temp. (Vacuum)
℃
1,900
1,750
1,800
1,750
Max. Use Temp. (Inert)
℃
2,000
1,750
1,800
1,750
Thermal Conductivity
W/m.K
35
30
85
30
CTE (25 – 1,000 ℃)
10-6/K
1.5
2
2.8
3.5

Porous boron nitride industrial ceramic insulator washer ring

We generally choose a form known as hexagonal boron nitride (h-BN). Hexagonal BN is a composite of boron and nitrogen that is both heat and chemically resistant. It is the most robust crystalline type of boron nitride, along with graphite. Since it has a composition identical to graphite, although you will even hear it named “white graphite” since it is white in colour. What is more, hardness of hexagonal BN is similar to graphite, so it is very easily to machine the parts into required shape, only one small tip,machining work should be process in dry conditions with no cooling liquid. Also, visible dust can be created during machining,so wearing mask and goggle is necessary.

Application

1.Used in high voltage and high frequency electric and plasma arc insulator and various heater insulators, heating tube sleeve and high temperature, high frequency, high voltage insulation cooling parts, high frequency application of electric furnace materials.

2.high voltage and high frequency electric and plasma arc insulator and various heater insulators, heating tube sleeve and high temperature, high frequency, high voltage insulation cooling parts, high frequency application of electric furnace materials.
3.It can be manufactured high-temperature components, rocket combustion chamber lining, thermal shielding of spacecraft, corrosion resistant parts of MHD generators, etc.

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