Ceramic products based on silicon carbide (SiC)

Silicon carbide (SiC) ceramics ensures high thermal resistance and high operational characteristics.
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Description
Specifications

Among the key benefits one can name resistance to temperature gradient, high corrosion resistance and stable dimensions. 


Silicon carbide ceramics was widely adopted in automobile production and aerospace as abrasive semiconductor structural high temperature material for production of engine elements and thermal facilities, as well as other electronics.


The “NPO “GKMP” LLC proposes silicon carbide ceramic parts of different design (SSiC, SiSiC, RSiC and OSiC) per Customer’s requirements.


Benefits:

  • High mechanical robustness
  • High hardness
  • Resistance to thermal shock
  • High durability when exposed to abrasive stress and high temperatures
  • Resistance to corrosion and oxidizing
  • High resistance to exposure of aggressive media
  • High electric conductivity
  • Low thermal expansion coefficient = high thermal resistance, stable geometry
  • High chemical resistance

Application:

  • Fittings and structural elements of high temperature furnaces;
  • Nozzles for various purposes, burner tops, retort vessels;
  • Jackets for thermal couples, heat-resistive tubes;
  • Crucibles, barrels, casings of different configuration;
  • Friction couple;
  • Heaters;
  • Elements of thermal combustion facilities etc.

Silicon infiltrated silicium carbide (SiSiC)

Property Meaning
Operating temperature, 0С

1380

Density, g/cm3

≥3.02

Apparent porosity, %

≤0.1

Flexural strength, MPa

250(20°С)

280 (1200°С)

Elasticity modulus, GPa

300(1200°С)

330(20°С)

Thermal conductivity, W/m·K

45(1200°С)

Strength

13

Resistance to acids and alkali

high

 



Sintered silicon carbide (SSiC)

Property Meaning
Free silicon, %

<0.1

Silicon carbide, %

≥99

Poured density, g/cm3

3.1-3.15

Vickers hardness, НV

2500

Rockwell hardness, НRA

94

Open porosity, %

<0.2

Compressive strength, MPa

>3000

Flexural strength, MPa

>400

Elasticity modulus, GPa

410

Thermal conductivity, W/m·K

100-120

 



Recrystallized silicon carbide (RSiC)

Property Meaning
α- SiC, %

98.5

Maximal operating temperature, oC

1650

Porosity, %

15

Poured density, g/cm3

2.60-2.74

Compressive strength, MPa

>600

Flexural strength, MPa

90-100

Young modulus, ГПа

240

Thermal conductivity, W/m·K

24

 


Oxide-bonded silicon carbide (OSiC)

 

Property Meaning
SiC, %

≥90

Maximal operating temperature, oC

1550

Open porosity, %

7-8

Poured density, g/cm3

2.75

Compressive strength, MPa

≥1300

Tensile strength at ambient temperature , MPa

≥500



Nitride-bonded Silicon carbide (NSiC)

 

Property Meaning
SiC content, %

≥75

Si3N4 content, %

≥21

Fe2O3 content, %

≤0.5

Maximal operating temperature, °С

1550

Porosity, %

≤15

Density, g/cm3

2.6-2.7

Flexural strength, MPa

≥180

Flexural strength (20°С), MPa

≥45

Flexural strength (1200°С), MPa

≥50

Thermal conductivity (800°С), W/m·K

≥18

Thermal conductivity (1200°С), W/m·K

≥14

 

 

The “NPO “GKMP” LLC proposes silicon carbide ceramic parts of different design (SSiC, SiSiC, RSiC and OSiC) per Customer’s drawing and dimensions required.

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Why choose us?

Affordable prices. The cost is calculated depending on requirements set forth in technical assignment.
Qualified personnel. Our well-trained staff will complete a task of any complexity.
High quality. We use only high-quality raw materials and keep up with the relevant technologies.
Full service cycle. Apart from production itself, we provide additional services, from comissioning to subsequent maintenance.
Wide range of products. Thanks to our long-standingand well-alligned cooperation with numerous companies, we constantly look for new challenges.
One-of-the-kind customized products. We work on approved technical assignment based on relevant standards and regulation.
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