Boron nitride ceramics
Boron nitride based ceramics are widely used in aircraft and rocket technology, in mechanical engineering and glass industry, in the chemical industry, energy and metallurgy. In the production of high-temperature equipment, crucibles, insulators and electric vacuum devices based on boron nitride are increasingly used.
The unique combination of exceptional thermal, physical and chemical characteristics of boron nitride-based ceramics makes it an ideal material for solving complex problems and achieving a wide range of industrial goals.
Areas of use:
- Crucibles, insulators and high temperature ceramics;
- High temperature lubricants;
- Synthesis of superhard substances;
- Electrovacuum and semiconductor instrument making.
Suggested modifications of boron nitride: HEXOGONAL (α) - h-BN, (white graphite, a talc-like powder, has a hexagonal, graphite-like crystalline structure and has semiconductor properties.
Characteristics:
- Heat resistance;
- Non toxicity;
- Chemical inertness;
- Resistance to oxidation (up to 700 ° C);
- High dielectric strength;
- Low dielectric constant.
LLC NPO GKMP delivers a wide range of heat-resistant ceramics based on hexagonal boron nitride (various shapes and sizes, taking into account the requirements and wishes of the customer).
Hot Pressed Boron Nitride (BN)
Sructure |
Measure |
BN˃99% |
BN˃98% |
BN+SiC+ZrO2 |
BN+AlN |
|
Binder |
|
self-binding |
B2O3 |
AlBO3 |
AlBO3 |
|
Density |
(g/cm3) |
1.9-2.0 |
2.1-2.2 |
2.3-3.0 |
2.5-2.6 |
|
Resistivity (at 25 ° C) |
(Ω/cm) |
>1014 |
˃1013 |
˃1012 |
˃1014 |
|
Maximum operating temperature |
Oxidizing medium |
(°С) |
900 |
900 |
900 |
900 |
Inert gas |
(°С) |
2300 |
2000 |
1700 |
2100 |
|
High vacuum |
(°С) |
1800 |
1800 |
1700 |
1900 |
|
Bending strength |
(MPа) |
25 |
75 |
100 |
130 |
|
Compressive strength |
(MPа) |
100 |
100 |
300 |
250 |
|
Thermal expansion coefficient 25-1000 ° C |
10-6/K |
0-2 |
2.0 |
4.0 |
4.5 |
|
Thermal conductivity |
(V/mK) |
50 |
30 |
40 |
60 |
We supply heat-resistant ceramics based on hexagonal boron nitride of various shapes and sizes, taking into account the requirements and wishes of the customer.
Boron nitride ceramics
PBN-based products are widely used in high-temperature technology products. One of the most important characteristics of boron nitride is that this substance gives any product heat resistance, density and stability.
PBN-based ceramics products are widely used in aircraft and rocket technology, in mechanical engineering and glass industry, in the chemical industry, energy and metallurgy. In the production of high-temperature equipment, crucibles, insulators and electric vacuum devices based on boron nitride are increasingly used.
The unique combination of exceptional thermal, physical and chemical characteristics of boron nitride-based ceramics makes it an ideal material for solving complex problems and achieving a wide range of industrial goals.
Pyrolytic Boron Nitride (PBN) is obtained by gas-phase chemical deposition. Compared to the conventional boron nitride compound, p-BN has a much higher level of purity and a number of advantages.
Areas of use:
- High vacuum processes (as a material for crucibles, boats, pipes, flasks, etc.);
- Processes for growing crystals (including complex semiconductor crystals);
- In the field of molecular beam epitaxy;
- The field of special equipment and electronics (production of integrated circuits, windows for outputting microwave energy, etc.);
- Synthesis and growing of semiconductors.
Suggested modifications of boron nitride: HEXOGONAL (α) - h-BN, (white graphite, a talc-like powder, has a hexagonal, graphite-like crystalline structure and has semiconductor properties.
Characteristics:
- High degree of purity (˃99.99%);
- High temperature resistance;
- Chemical inertness;
- High thermal conductivity;
- Radio transparency;
- Non toxicity.
NPO GKMP LLC supplies a wide range of heat-resistant ceramics based on pyrolytic boron nitride (various shapes and sizes, taking into account the requirements and wishes of the customer).
Pyrolytic boron nitride
Properties |
Measure |
Value |
|
Density |
(g/cm3) |
1.95-2.20 |
|
Lattice constant |
μm |
a: 2.504x10-10 c:6.692x10-10 |
|
Resistivity |
(Ω/cm) |
3.11x 1011 |
|
Tensile strength (ab) |
(Н/mm2) |
153.86 |
|
Bending strength |
c |
(Н/mm2) |
243.63 |
ab |
(Н/mm2) |
197.76 |
|
Coefficient of elasticity |
(Н/mm2) |
235690 |
|
Thermal conductivity |
200 |
(W/mК) |
a:60 c:2.6 |
900 |
(W/mК) |
a:43.7 c:2.8 |
|
Dielectric strength (at room temperature) |
(kV/mm) |
56 |
We supply heat-resistant ceramics based on hexagonal boron nitride of various shapes and sizes, taking into account the requirements and wishes of the customer.