Ultra-high-temperature ceramics

Silicon carbide 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)

Description Specifications

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)

Description Specifications

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)

Description Specifications

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 (25-800^оС)	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

Description Specifications

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) Pyrolytic boron nitride (PBN -based) ceramics products

Ceramic products based on boron nitride (BN)

Description Specifications

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.

Description Specifications

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.

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
Bending strength	ab	(Н/mm²)	197.76
Coefficient of elasticity		(Н/mm²)	235690
Thermal conductivity	200	(W/mК)	a:60 c:2.6
Thermal conductivity	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.

Silicon carbide ceramics

Silicon carbide ceramics

The non-oxide ceramic silicon carbide (SiSiC)

Sintered Silicon Carbide (SSiC)

Recrystallized SiC (RSiC)

Oxide Bounded Silicon Carbide (OSiC)

Zirconium dioxide ceramics

Zirconium dioxide ceramics

The main properties of the material

Aluminium oxide ceramics

Aluminium oxide ceramics

ZTA based ceramics

ZTA based ceramics

The main characteristics of the material:

Boron nitride ceramics

Boron nitride ceramics

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