High temperature ceramics draws attention of manufacturers due to specific properties and a broad range of application in different industries that require high temperatures.

Physicalproperties, hardness factor and stability at high temperatures put high temperature ceramics high for high temperature treatment of materials both in vacuum or without one.

Nevertheless, resistance to oxidation limited by 500ºC is considered one of the crucial disadvantages of this type. Contact with air can substantially affect its high temperature properties. This is the reason why high temperature ceramics is used in nodes isolated from air.

Refractory materials and high temperature ceramics across the globe is still an object of study though gained its pace among key structural materials in several industries, such as:

Metal work
Aviation
Rocketry
Nuclear energy
Electronics
Chemical industry

Silicon carbide, due to its unique combination of physical anthropologists including power electronics, machinery, metallurgy, chemical and food production oil and gas production expenses.

Zirconium dioxide is used to produce extra heat resistive units, heat resistive enamel, refractory glass, differenttypesofceramics, ceramicpigments, hardelectrolytes, thermalprotectioncoatings, catalyzers, artificialgems, cuttingtoolsandabrasivematerials.

In recent years zirconium dioxide is widely used in fiber optics and production of ceramics designed for electronics.

Boron nitride was widely adopted in heavy industry and chemical industry, as well as in several branches of electronics.

Application of aluminum oxide ceramics is rather wide thanks to its substantial hardness, heat resistance and good insulation properties of material. High temperature ceramics of different modifications of Al203 is in high demand in different industries of oil production and chemicals, as well as in others.

Advanced ZTA-based ceramics based (combination of Al2O3 and ZrO2) is mostly used to produce insulators, sensors, piston-bushings and pump components, water supply system components, housings and LED chips.

Application of high temperature ceramics in a technical process are still an object of study and new initiatives concerning its possible use.

Silicon carbide ceramic products

Ultra-high-temperature ceramics

Silicon carbide ceramic products

Ceramic products based on silicon carbide (SiC)

Description Specifications

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

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.

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.

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

Silicon infiltrated silicium carbide (SiSiC)

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)

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)

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)

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)

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.

Zirconium dioxide ceramics

Ultra-high-temperature ceramics

Zirconium dioxide ceramics

Products from zirconium dioxide ceramics (ZrO2)

Description Specifications

Products made of zirconium dioxide technical ceramics are chemically inert (do not react with aggressive agents).

Zirconium dioxide (ZrO2) has a unique set of properties, such as:

High hardness;
Perfect corrosion resistance;
Low thermal conductivity;
Crack resistance;
Robustness at high temperatures.

The combination of these properties renders Zirconium dioxide ceramics irreplaceable for numerous industries (from high resistive parts to medicine).

Zirconium dioxide is used to obtain extra heat resistive products, heat resistive enamel, refractory glass, different types of ceramics, ceramic pigments, thermal protective coatings, catalyzers, cutters and abrasive materials. Recently zirconium dioxide is widely used in fiber optics and production of ceramics to be integrated in electronic devices.

Characteristics:

Maintain robustness at high temperatures (melting point 2715 °С);
High hardness;
Corrosion resistance;
Low thermal conductivity.

Application:

Facing for worn-off hardware;

Roll bearings;

Grinding bodies;

Crucibles;

Screw conveyors;

Elements of valves and shut-offs;

Rolls for milling fittings;

Elements for oxygen sensors;

Heaters;

Heat-resistive products;

Plungers;

Ceramic insulators.

We supply zirconium dioxide products of different design per Customer’s individual drawings.

Basic properties of the material ZrO₂ 95%+ Y₂O₃ 5%

Density, g/cm³	6.03
Open porosity, %	0
Vickers hardness	1150 (HV0.5)
Elasticity modulus, GPa	205
Flexural strength, MPa	1300
Compressive strength, MPa	3000
Thermal conductivity at 20-100°С, W/mK	2.0
Thermal resistance	280 (△ T °С)
Linear thermal expansion coefficient at 20-1000°С, 10-6К-1	10-11
Volumetric specific resistance (20°С)	≥1010 (Ω)
Maximal operating temperature	1000

Material can be used with alternative percentage ZrO2 + Y2O3.

It is possible to use calcium oxide or magnesium oxide as stabilizer, if so requested by the Customer.

The “NPO “GKMP” LLC supplies zirconium dioxide products of different design per Customer’s individual drawings.

Aluminium oxide ceramics

Ultra-high-temperature ceramics

Aluminium oxide ceramics

Aluminum oxide-based ceramic products (Al2O3)

Description Specifications

Key properties of aluminum oxide (Al2O3):

High hardness;
High thermal conductivity;
High corrosion resistance;
Low density;
Robustness at high temperatures;
Electric insulation properties;
Low cost in comparison with other ceramic materials

The main areas of use from corundum (aluminum oxide):

Facing of consumable hardware;
End seal rings;
Drain bushings, wiring, guiding beams;
Roller balls;
Milling fittings;
Burners;
Crucibles;
Valve components and shut-offs;
Nozzles for argon arc welding machines;
Electric insulators;

There are few modifications of aluminum oxide depending on the main phase of impurities that differ in strength and chemical stability.

Al₂O₃, %	60	75	80	85	92	95	99	99.7
Density, g/cm³	3.0	3.1	3.3	3.4	3.6	3.7	3.81	3.85
Flexural strength, MPa	205	280	215.7	230	312	304	340	370
Linear thermal expansion coefficient, (25-800^оС), 10^-6/^оС	7.1	7.6	7.6	7.6	7.5	7.3	7.6	7.6
Dielectric strength, kW/mm	10	10	10	10	10	10	10	10
Specific electric resistance 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
Heat resistance, ^оС	1800	1700	1800	1850	1920	2000	2030	2040

ZTA based ceramics

Ultra-high-temperature ceramics

ZTA based ceramics

ZTA-based ceramic products

Description Specifications

ZTA is a combination of alumina and 10-20% zirconium

ZTA properties:

Additional hardness and viscosity compared to that of aluminum oxide;
Better price that that of zirconium dioxide;
High corrosion resistance;
High fracture viscosity;
High flexural strength.

Application:

Insulators, sensors, piston bushings and pump components;
Liquid supply system components;
LED chip carriers.

The main characteristics of the material:

ZrO, %	20
Al₂O₃+ZrO₂, %	30
Density, g/cm³	≥4.00
Water absorbed, %	0
Hardness, HV(GPa)	1650
Flexural strength, MPa	400-500
Compression strength, MPa	2800
Fracture viscosity, MPa m³/2	9.8
Elasticity modulus, GPa	310
Maximal operating temperature, оС	1450
Sintering temperature, ^оС	1650
Thermal expansion coefficient, X¹⁰-6/^oC	8.2
Thermal conductivity, W/m • K(25-300°С)	9.8

The “NPO “GKMP” LLC supplies ZTA products of different design per Customer’s individual drawings.
Maximal operating temperature of ZTA products - 1450°С. ZTA is often used to produce insulators, sensors and pump components, fluid supply system components, casing and LED chips carriers.

Boron nitride ceramics

Ultra-high-temperature ceramics

Boron nitride ceramics

Ceramic products based on boron nitride (BN)

Description Specifications

Boron nitride ceramics product (BN)

Boron nitride products are widely used in high temperature hardware.

One of the key characteristics of boron nitride is that it provides to any item more thermal resistance, density and stability. Boron nitride is widely used in heavy industry and for chemicals.

Boron nitride ceramics was widely adopted in aircraft and rocket engineering, machinery and glass melting, chemical industry, energy and metallurgy. Production of high temperature hardware often involves crucibles, insulators and electric vacuum tools of boron nitride.

A unique combination of thermal, physical and chemical characteristics of boron nitride ceramics make it perfect to meet complex needs and tackle the entire range of production challenges.

Application:

Crucibles, insulators and high temperature ceramics;
High temperature lubricants;
Synthesis of extra-soil substances;
Production of electric vacuum hardware and semiconductors.

Boron nitride: HEXAGONAL (α) — h-BN, (white graphite, talc-like powder, has a hexagonal crystal structure and semiconductor properties).

Characteristics:

Thermal capacity;
Non-toxic;
Chemical inertness;
High dielectric strength;
Low dielectric capacity.

We supply heat resistive ceramics based on hexagonal boron nitride (of different shapes and dimensions per Customer’s needs and requirements).

Hot-pressed hexagonal boron nitride (BN)

Composition	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
Specific resistance (at 25°C), Ω/cm	>1014	˃1013	˃1012	˃1014
Maximal operating temperature, Oxidizer, °С	900	900	900	900
Maximal operating temperature, Inert gas , °С	2300	2000	1700	1700
Maximal operating temperature, High vacuum, °С	1800	1800	1700	1700
Flexural strength, MPa	25	75	100	130
Compressive strength, MPa	100	100	300	250
Thermal expansion coefficient 25-1000°C, 10^-6/K	0-2	2.0	4.0	4.5
Thermal conductivity, W/mK	50	30	40	60

We produce thermal resistive ceramics based on hexagonal boron nitride of different shapes and dimensions per Customer’s needs and requirements.

Pyrolytic boron nitride ceramics (p-bn)

Ultra-high-temperature ceramics

Pyrolytic boron nitride ceramics (p-bn)

Pyrolytic boron nitride (PBN -based) ceramics products

Description Specifications

Boron nitride ceramics is widely used in production of high temperature hardware. One of the key characteristics of boron nitride is that this component provides heat resistance, density and stability to any piece.

A unique combination of thermal, physical and chemical characteristics of boron nitride ceramics make it perfect to meet complex needs and tackle the entire range of production challenges.

Pyrolytic boron nitride is obtained via gas and phase chemical deposition. Compared to standard composition of boron nitride, pyrolytic boron nitride is much purer and has a number of benefits.

Application:

High vacuum processes (as material for crucibles, baths, tubes and vessels etc.);
Crystal growing processes (incl., semiconductor crystals);
Molecular beam epitaxy;
Special-purpose hardware and electronics (production of integral micro circuits, UHF-energy output displays, etc.);
Synthesis and growing of semiconductors.

Characteristics:

High purity (˃99.99%);
High thermal resistance;
Chemical inertness;
High thermal conductivity;
Radio transparency;
Non-toxic.

We supply pyrolytic boron nitride ceramics of different shapes and dimensions per Customer’s needs and requirements.

Pyrolytic boron nitride (p-BN)

Density, g/cm³	1.95-2.20
Crystallic grid constant, µm	a: 2.50410-10 c:6.69210-10
Specific resistance, Ω/cm	3.11*1011
Flexural strength (ab), N/mm²	153.86
Flexural strength, N/mm² c ab	243.63 197.76
Elasticity coefficient, N/mm²	235690
Thermal conductivity , 200, W/m·K	a:60 c:2.6
Thermal conductivity , 900, W/m·K	a:43.7 c:2.8
Dielectric strength (at ambient temperature), kW/mm	56

The “NPO “GKMP” LLC supplies a wide range of thermal resistive ceramics based on pyrolytic boron nitride (of different shapes and dimensions per Customer’s needs and requirements).