Creusets en nitrure de bore pour système de filature sous vide

Tuyau en céramique hexagonal isolant de nitrure de bore BN
Plaque PBN de nitrure de bore pyrolytique d'isolateur électrique
Creusets en nitrure de bore pour système de filature sous vide
Creusets en nitrure de bore pour système de filature sous vide 1
Creusets en nitrure de bore pour système de filature sous vide
Creusets en nitrure de bore pour système de filature sous vide 1

Creusets en nitrure de bore pour système de filature sous vide

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Creusets en nitrure de bore pour système de filature sous vide

Hexagonal boron nitride (NE) is made by hot-pressed sintering,boron nitride crucible have a good self-lubricate ceramic crucibles that can withstand high temperature and maintain its lubricating capability in a high vacuum environment. boron nitride ceramic has similarly with graphite mechanically but offers excellent electrical resistance.

Boron nitride ceramic is chemically and has relatively good thermal conductivity, low thermal expansion and microwave clarity. Boron nitride can be quickly machined as well. Moreover, glass, salts and the rest of liquid metals are non-wetting. This ensures that neither of these compounds can be moistened, and it is far more immune to chemical assaults.
Nitrure de bore hexagonal (h-BN) performs very well under high heat condition and is effective in the air at temperatures of up to 900 degrees C, in the vacuum at 1,900 degrees C and in the inert environment at 2,000 degrees C. BN is self-lubricating as well, par conséquent, it does not need the use of molecules of gas or water stuck in its layers. Because of this, in a vacuum, which is important for aerospace applications, boron nitride (NE) can work perfectly.

Les Boron Nitride Crucibles are widely used for vacuum melt spinning system,tel que :
* Nonferrous & ferrous metals such as Al, Bi, Ge, Sb, Sn, Cd, Pb, Ni, Zn, Cu, mg, Im, Fe, Acier inoxydable…
* Glass melt, Soda glass, Cryolite
* Silicon molten salt, fluoride, slag

there are standard BN crucibles for this melt spinning system application, certainly we also can make by customized.

✔Bonne isolation électrique:

ITEM
UNIT
BN-2000
BN-2300
BN-2800
BN-3000
Contenu principal
Tube en céramique d'alumine pour capteurs automobiles
NE>99%
BN+Al2O3
BN+AlN
BN+ZrO2
Couleur
Tube en céramique d'alumine pour capteurs automobiles
blanche
Light Grey
Dark Grey
Dark Grey
Densité
g/cm3
1.95-2.00
2.25-2.35
2.75-2.85
2.90-3.00
Résistance à la flexion
MPa
30
65
85
90
Résistance à la compression
MPa
55
145
205
220
Electrical Resistivity
??·cm
>1014
>1013
>1013
>1012
Max. Use Temp. (Air)
°C
900
1,000
1,000
1,000
Max. Use Temp. (Vacuum)
°C
1,900
1,750
1,800
1,750
Max. Use Temp. (isolateurs pour dispositifs microélectroniques)
°C
2,000
1,750
1,800
1,750
Conductivité thermique
W/m.K
35
30
85
30
Côte (25 Tube en céramique d'alumine pour capteurs automobiles 1,000 °C)
10-6/Tube
1.5
2
2.8
3.5

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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