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.
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
Silicon free
<0.1
Silicon carbide
≥99
Bulk density
3.1-3.15
Vickers hardness
НV
2500
Rockwell hardness
НRA
94
<0.2
Compressive strength
>3000
>400
410
100-120
α- SiC
98.5
Maximum operating temperature
1650
Porosity
15
2.60-2.74
≥600
90-100
Young's module
240
24
SiC
≥90
1550
7-8
2.75
kg/сm2
≥1300
Tensile strength at room temperature
kg/cm2
≥500
Nitrogen-bonded silicon carbide (NSiC)
SiC content
≥75
Si3N4 content
≥21
Fe2O3 content
≤0,5
°С
≤15
2,6-2,7
≥180
Bending strength (20 ° C)
≥45
Bending strength (1200 ° C)
≥50
Thermal conductivity (800 ° C)
W/m·К
≥18
Thermal conductivity (1200 ° C)
≥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 (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:
Sructure
ZrO2 95%+ Y2O3 5%
Density, g / cm3
6.03
Open porosity, %
0
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)
1000
ZrO2 85,5%+ Y2O314,5%
6.04
Crystal lattice structure
Cubic (at high temperatures) Tetragonal (at low temperatures)
200-300
Hardness
1100 (HV)
Thermal conductivity, W / m · K
27
Thermal conductivity at 20-100 ° С, W / mK
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.
The main properties of alumina (Al2O3):
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
g/сm3
3.0
3.1
3.3
3.4
3.6
3.7
3.81
3.85
280
215.7
230
312
304
340
370
Coefficient of linear thermal expansion
10-6/оС
(25-800оС)
7.1
7.6
7.5
7.3
Dielectric Strength
kV/mm
Electrical resistivity
20°С ,Ω•сm 300°С,Ω•сm
>1014 >1013
>1014 >1012
>1014 >1010
Operating temperature
оС
1350
1250
1290
1390
1480
1600
1700
Mohs' hardness
8.5
8.8
9.0
Fire resistance
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 is a combination of alumina and 10-20% zirconium
LLC NPO GKMP supplies custom-made ceramic products based on ZTA according to customer drawings.
ZTA Properties
ZrO2
20
Al2O3+ZrO2
г/см3
≥4.00
Water absorption
HV(GPа)
400-500
Compressive Strength
2800
Fracture toughness
MPа м3/2
9.8
310
Maximum using temperature
1450
Sintering temperature
Thermal expansion coefficient
X10-6/oC
8.2
V / m • K (25-300 ° С)
LLC NPO GKMP supplies custom-made ceramic products based on ZTA according to individual customer drawings.
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.
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.
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)
BN˃99%
BN˃98%
BN+SiC+ZrO2
BN+AlN
Binder
self-binding
B2O3
AlBO3
(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
Oxidizing medium
(°С)
900
Inert gas
2300
2100
High vacuum
1900
(MPа)
25
100
130
300
250
Thermal expansion coefficient 25-1000 ° C
10-6/K
0-2
4.0
4.5
(V/mK)
50
30
40
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.
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.
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
1.95-2.20
Lattice constant
μm
a: 2.504x10-10
c:6.692x10-10
Resistivity
3.11x 1011
Tensile strength (ab)
(Н/mm2)
153.86
c
243.63
ab
197.76
Coefficient of elasticity
235690
200
(W/mК)
a:60
c:2.6
a:43.7
c:2.8
Dielectric strength (at room temperature)
(kV/mm)
56
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