Silicon carbide ceramics

SiC ceramics have been widely used in the automotive and aerospace industries as an abrasive semiconductor structural high-temperature material for the production of engine parts and thermal installations, as well as electronics.
Areas of use:
Material Advantages:
NPO GKMP LLC offers a variety of ceramic parts based on silicon carbide (sintered SSiC, reaction sintered SiSiC, recrystallized RSiC and oxide-bonded OSiC) of various sizes according to customer size.
The non-oxide ceramic silicon carbide (SiSiC)
Name |
Measure |
Value |
Use temperature |
0С |
1380 |
Density |
g/cm3 |
≥3.02 |
Open porosity |
% |
≤0.1 |
Bending strength |
MPа |
250(20°С) 280 (1200°С) |
Elastic modulus |
GPа |
300(1200°С) 330(20°С) |
Thermal conductivity |
W / mK |
45(1200°С) |
Rigidity |
13 |
|
Resistance to acid and alkali |
High |
Sintered Silicon Carbide (SSiC)
Name |
Measure |
Value |
Silicon free |
% |
<0.1 |
Silicon carbide |
% |
≥99 |
Bulk density |
g/cm3 |
3.1-3.15 |
Vickers hardness |
НV |
2500 |
Rockwell hardness |
НRA |
94 |
Open porosity |
% |
<0.2 |
Compressive strength |
MPа |
>3000 |
Bending strength |
MPа |
>400 |
Elastic modulus |
GPа |
410 |
Thermal conductivity |
W / mK |
100-120 |
Recrystallized SiC (RSiC)
Name |
Measure |
Value |
α- SiC |
% |
98.5 |
Maximum operating temperature |
0С |
1650 |
Porosity |
% |
15 |
Bulk density |
g/cm3 |
2.60-2.74 |
Compressive strength |
MPа |
≥600 |
Bending strength |
MPа |
90-100 |
Young's module |
GPа |
240 |
Thermal conductivity |
W / mK |
24 |
Oxide Bounded Silicon Carbide (OSiC)
Name |
Measure |
Value |
SiC |
% |
≥90 |
Maximum operating temperature |
0С |
1550 |
Open porosity |
% |
7-8 |
Bulk density |
g/cm3 |
2.75 |
Bending strength |
kg/сm2 |
≥1300 |
Tensile strength at room temperature |
kg/cm2 |
≥500 |
Nitrogen-bonded silicon carbide (NSiC)
Name |
Measure |
Value |
SiC content |
% |
≥75 |
Si3N4 content |
% |
≥21 |
Fe2O3 content |
% |
≤0,5 |
Maximum operating temperature |
°С |
1550 |
Porosity |
% |
≤15 |
Density |
g/cm3 |
2,6-2,7 |
Compressive strength |
MPа |
≥180 |
Bending strength (20 ° C) |
MPа |
≥45 |
Bending strength (1200 ° C) |
MPа |
≥50 |
Thermal conductivity (800 ° C) |
W/m·К |
≥18 |
Thermal conductivity (1200 ° C) |
W/m·К |
≥14 |
NPO GKMP LLC supplies a variety of custom-made parts of different types and features made of ceramic based on silicon carbide (sintered silicon carbide (SSiC), non-oxide ceramic silicon carbide (SiSiC), recrystallized silicon carbide (RSiC), oxide bounded silicon carbide (OSiC), nitrogen-bonded silicon carbide (NSiC) in accordance with the dimensions and drawings of the customer.
Zirconium dioxide ceramics

Zirconium dioxide (ZrO2) has an exceptional range of properties, such as:
All these combinations make zirconia-based ceramics indispensable for a wide variety of industries (from the production of refractories to medicine).
Zirconium dioxide is used in the production of highly refractory products, heat-resistant enamels, refractory glasses, various types of ceramics, ceramic pigments, solid electrolytes, thermal protective coatings, catalysts, cutting tools and abrasive materials. In recent years, zirconia has become widely used in fiber optics and the manufacture of ceramics used in electronics.
Characteristics:
Areas of use:
The main properties of the material
Sructure |
ZrO2 95%+ Y2O3 5% |
Density, g / cm3 |
6.03 |
Open porosity, % |
0 |
Vickers hardness |
1150 (HV0.5) |
Elastic modulus, GPа |
205 |
Bending Strength, MPа |
1300 |
Compressive strength, MPа |
3000 |
Thermal conductivity at 20-100 ° С, W/mК |
2.0 |
Heat resistance |
280 (△ T °С) |
The coefficient of linear thermal expansion at 20-1000 ° C, 10-6K-1 |
10-11 |
Volume resistivity (20 ° C) |
≥1010 (Ω) |
Maximum operating temperature |
1000 |
Sructure |
ZrO2 85,5%+ Y2O314,5% |
Density, g / cm3 |
6.04 |
Crystal lattice structure |
Cubic (at high temperatures) |
Bending Strength, MPа |
200-300 |
Hardness |
1100 (HV) |
Thermal conductivity, W / m · K |
27 |
Thermal conductivity at 20-100 ° С, W / mK |
2.0 |
The coefficient of linear thermal expansion at 20-1000 ° C, 10-6K-1 |
10 |
Melting point, ° С |
2715 |
Operating temperature range, ° С |
0-2300 |
It is possible to use a material with a different percentage of ZrO2 + Y2O3.
At the request of the customer, it is possible to use calcium oxide or magnesium oxide as a stabilizer.
NPO GKMP LLC supplies custom-made zirconia products of various configurations according to individual customer drawings.
Aluminium oxide ceramics

The main properties of alumina (Al2O3):
The main areas of use from corundum (aluminum oxide):
There are several modifications of aluminum oxide depending on the content of the main phase and impurities, which differ in strength and chemical resistance.
Al2O3 |
% |
60 |
75 |
80 |
85 |
92 |
95 |
99 |
99.7 |
Density |
g/сm3 |
3.0 |
3.1 |
3.3 |
3.4 |
3.6 |
3.7 |
3.81 |
3.85 |
Bending strength |
MPа |
205 |
280 |
215.7 |
230 |
312 |
304 |
340 |
370 |
Coefficient of linear thermal expansion |
10-6/оС (25-800оС) |
7.1 |
7.6 |
7.6 |
7.6 |
7.5 |
7.3 |
7.6 |
7.6 |
Dielectric Strength |
kV/mm |
10 |
|||||||
Electrical resistivity |
20°С ,Ω•сm |
>1014 |
>1014 |
>1014 |
>1014 |
>1014 |
>1014 |
>1014 |
>1014 |
Operating temperature |
оС |
1350 |
1000 |
1250 |
1290 |
1390 |
1480 |
1600 |
1700 |
Mohs' hardness |
7.5 |
7.5 |
7.5 |
7.5 |
8.5 |
8.8 |
9.0 |
9.0 |
|
Fire resistance |
оС |
1800 |
1700 |
1800 |
1850 |
1920 |
2000 |
2030 |
2040 |
LLC NPO GKMP supplies custom-made products from oxide ceramics of various sizes according to individual requests of the customer.
ZTA based ceramics

ZTA is a combination of alumina and 10-20% zirconium
ZTA Properties:- Extra strength and toughness compared to alumina;
- Lower cost than zirconia;
- High corrosion resistance;
- High fracture toughness;
- High bending strength.
Areas of use:
- Insulators, sensors, piston bushings and pump components;
- Fluid supply system components;
- LED Chip Carriers.
LLC NPO GKMP supplies custom-made ceramic products based on ZTA according to customer drawings.
The main characteristics of the material:
ZTA Properties |
Measure |
Value |
ZrO2 |
% |
20 |
Al2O3+ZrO2 |
% |
80 |
Density |
г/см3 |
≥4.00 |
Water absorption |
% |
0 |
Hardness |
HV(GPа) |
1650 |
Bending strength |
MPа |
400-500 |
Compressive Strength |
MPа |
2800 |
Fracture toughness |
MPа м3/2 |
9.8 |
Elastic modulus |
GPа |
310 |
Maximum using temperature |
оС |
1450 |
Sintering temperature |
оС |
1650 |
Thermal expansion coefficient |
X10-6/oC |
8.2 |
Thermal conductivity |
V / m • K (25-300 ° С) |
9.8 |
LLC NPO GKMP supplies custom-made ceramic products based on ZTA according to individual customer drawings.
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.
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.