Silicon carbide ceramics

Ultra-high-temperature ceramics

Silicon carbide ceramics

Ceramic based on silicon carbide (SiC) provides products with high heat resistance and the highest performance. The main advantages are the resistance of the material to temperature extremes, high corrosion resistance and stable product dimensions.
Ceramic products based on silicon carbide (SiC)

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:

  • Accessories and constructional elements of high-temperature furnaces;
  • Nozzles for various purposes and burner tops, retorts;
  • Covers for thermocouples, heat-resistant pipes;
  • Crucibles, glasses, sleeves of various configurations;
  • Friction pairs;
  • Heaters;
  • Elements of thermal combustion plants, etc.
  • Material Advantages:

  • High mechanical strength;
  • High hardness;
  • Resistance to thermal shock;
  • High wear resistance in conditions of abrasive wear and elevated temperatures;
  • Resistance to corrosion and oxidation;
  • High resistance to aggressive environments;
  • High electrical conductivity;
  • Low coefficient of thermal expansion + high thermal conductivity = high heat resistance, stability of geometric characteristics;
  • High chemical resistance.
  • 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

    Ultra-high-temperature ceramics

    Zirconium dioxide ceramics

    Products made of technical ceramics based on stabilized zirconium dioxide are chemically inert (do not react with aggressive substances).
    Ceramic products based on zirconium dioxide (ZrO2)

    Zirconium dioxide (ZrO2) has an exceptional range of properties, such as:

  • High hardness;
  • Excellent corrosion resistance;
  • Low thermal conductivity;
  • Crack resistance;
  • Preservation of strength at high temperatures.
  • 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:

  • Preservation of strength at high temperatures (melting point 2715 ° C);
  • High hardness;
  • Corrosion resistance;
  • Low thermal conductivity.
  • Areas of use:

  • Lining of wear equipment;
  • Bearings;
  • Grinding bodies;
  • Crucibles;
  • Augers;
  • Elements of valves and valves;
  • Rollers for rolling reinforcement;
  • Parts for oxygen sensors;
  • Heaters;
  • Refractory products;
  • Plungers;
  • Ceramic insulators.

  • 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)
    Tetragonal (at low 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

    Ultra-high-temperature ceramics

    Aluminium oxide ceramics

    Products from aluminum oxide (alumina, corundum) are in demand more than any other high-quality ceramic material.
    Aluminum oxide-based ceramic products (Al2O3)

    The main properties of alumina (Al2O3):

  • High hardness;
  • Good thermal conductivity;
  • Excellent corrosion resistance;
  • Low density;
  • Preservation of strength at high temperatures;
  • Electrical insulation properties;
  • Low cost in relation to other ceramic materials.

  • The main areas of use from corundum (aluminum oxide):
  • Lining of wear equipment;
  • Mechanical seal rings;
  • Dies, wiring, guides;
  • Bearings;
  • Grinding bodies;
  • Burners;
  • Crucibles;
  • Elements of valves and valves;
  • Nozzles for devices for argon-arc welding;
  • Electrical insulators.
  • 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
    300°С,Ω•сm

    >1014
    >1013

    >1014
    >1013

    >1014
    >1013

    >1014
    >1013

    >1014
    >1013

    >1014
    >1012

    >1014
    >1010

    >1014
    >1010

    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

    Ultra-high-temperature ceramics

    ZTA based ceramics

    The maximum temperature for using products from ZTA is 1450 ° С. ZTA material is more often used in the manufacture of insulators, sensors, piston bushings and pump components, components of the fluid supply system, housings and carriers of LED chips.
    ZTA-based ceramic products

    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

    Ultra-high-temperature ceramics

    Boron nitride ceramics

    Boron nitride products are widely used in high-temperature technology products.
    Ceramic products based on boron nitride (BN)

    Boron Nitride CeramicsBoron 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.

    Pyrolytic boron nitride (PBN -based) ceramics productsPBN-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.

    Documents

    Certificates and permissions Support information QMS Product overview
    Sanitary-Epidemiological Conclusion certificate of using sources Ionizing radiation
    Sanitary-Epidemiological Conclusion certificate of using sources Ionizing radiation 2 pp.
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