OD | ID | Length | Application & Advantages | |
---|---|---|---|---|
Closed One End Hexoloy SE SiC Protection Tubes
|
9.5 - 25.4 mm |
6.35 - 25.4 mm (1/4" - 1") |
152 - 1 372 mm (6" - 54") |
Advantage: Thin wall, fast response, superior thermal shock resistance, works up to 1650ºC in oxidizing atmosphere Application: Thermocouples & Thermowells for Non-Ferrous Metals, Glass, Cement, Chemicals, Molten Salts |
Fused Alumina Crushable Insulator
|
0.56 - 12.7 mm |
0.18 - 7.24 mm (0.007" - 0.285") |
101.6 mm (4") max |
Advantage: High electrical insulation; not sensitive to humidity Application: MI thermocouples & cables |
Fused MgO Crushable Insulator |
0.56 - 12.7 mm |
0.18 - 7.24 mm (0.007" - 0.285") |
101.6 mm (4") max |
Advantage: High electrical insulation Application: MI thermocouples & cables |
Fused MgO Insulating Grain |
Milled or Unmilled grains
|
Advantage: High electrical insulation Application: MI thermocouples & cables |
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Density (g/cc) |
Specific Stifness | Thermal Conductivity (W/mK) |
Thermal Expansion (10-6/K) |
|
---|---|---|---|---|
Granite | 2.8 - 2.9 | 21-32 | 3 | 5 - 7 |
Alumina | 3.95 | 96 | 20 | 8 |
Steel |
7.88
|
27 | 47 | 12 |
Aluminum |
2.69
|
26 | 204 | 22.5 |
Advancer (NSiC) |
2,8
|
86 | 20 | 4,4 |
Silit (SiSiC) |
3,0 | 117 | 140 | 4,5 |
Hexoloy
(SSiC) |
3,10 | 132 | 125 | 4,0 |
Test Environment* Conc. Reagent |
Corrosive Weight Loss (mg/cm2 yr) | |||||||
---|---|---|---|---|---|---|---|---|
Temp. (°C) |
Hexoloy® SA (No Free SiC) |
Reaction Bonded SiC (12% SiC) |
Tungster Carbide (6% Co) |
Aluminum Oxide (99%) |
||||
98% H2SO4 | 100 | 1.8 | 55.0 | >1000 | >65.0 | |||
50% NaOH | 100 | 2.6 | >1000 | 5.0 | 75.0 | |||
53% HF | 25 | <0.2 | 7.9 | 8.0 | 20.0 | |||
85% H3PO4 | 100 | <0.2 | 0.5 | >1000 | 7.0 | |||
45% KOH | 100 | <0.2 | >1000 | 3.0 | 60.0 | |||
25% HCl | 70 | <0.2 | 0.9 | 85.0 | 72.0 | |||
10% HF plus 57% HNO3 | 25 | <0.2 | >1000 | >1000 | 16.0 |
Test Environment* Conc. Reagent |
Corrosive Weight Loss (mg/cm2 yr) | ||||
---|---|---|---|---|---|
(Wt%) | Temp. (°C) |
Hexoloy® SA (No Free SiC) |
Reaction Bonded SiC (12% SiC) |
Tungsten Carbide (6% Co) |
Alminum Oxide (99%) |
98% H2SO4 | 100 | 1.8 | 55.0 | >1000 | 65.0 |
50% NaOH | 100 | 2.6 | >1000 | 5.0 | 75.0 |
53% HF | 25 | <0.2 | 7.9 | 8.0 | 20.0 |
85% H3PO4 | 100 | <0.2 | 8.8 | 55.0 | >1000 |
70% HNO3 | 100 | <0.2 | 0.5 | >1000 | 7.0 |
45% KOH | 100 | <0.2 | >1000 | 3.0 | 60.0 |
25% HCl | 70 | <0.2 | 0.9 | 85.0 | 72.0 |
10%HF plus 57% HNO3 | 25 | <0.2 | >1000 | >1000 | 16.0 |
Hexoloy® SA and SG components, such as vacuum chucks, chemical mechanical polishing (CMP) blocks and wafer carrier trays, are used in semiconductor wafer processing equipment. Hexoloy material’s thermal expansion matches to silicon, high elastic modulus, and chemical inertness ensures the economic benefits of maintenance and reuse, and high thermal conductivity for even, rapid heating of the silicon wafer.
Material | Density (g/cc) | Flexural Strenght (MPa) | Electrical Resistivity (ohm-cm) | Thermal Conductivity (W/m.K) | Elastic Modulus (GPa) |
---|---|---|---|---|---|
Hexoloy SA |
3.15 | 380 | 102-106 | 125 | 410 |
Hexoloy SG (Sintered SiC with free Carbon) |
3.0 | 311 | 1 | 118 | 376 |
Erosion Resistance of different materials:
Density | Coefficient of Thermal Expansion (x10-6/K) |
Flexural Strength |
Thermal Conductivity (W/m K) |
Elastic modulus (Gpa) |
|
---|---|---|---|---|---|
Hexoloy SA (Sintered SiC) |
3.15 | 4.0 | 380 | 125 | 410 |
Grade | Approx. Particle Retention Size | Apparent Porosity | Composition | Maximum Use Temperature | Coeff. of Thermal Expansion (30-1500°C) | Approx. Electrical Resistivity | Effect on Atmospheres | |
---|---|---|---|---|---|---|---|---|
Alundum® AN-788 | Fine | 0.1 micron | 35% | 91% Al2O3 | 1450°C | 8.6x10-6 |
130.0 Megaohms at 530°C 16.0 Megaohms at 730°C 5.3 Megaohms at 890°C 1.5 Megaohms at 1020°C |
Oxidizing: None Reducing: Reduction of bond constituents above 1400°C Effect on Acids: None except HF and concentrated H3PO4 Effects of Alkalies: None except strong hot caustic solutions and fused alkalies |
Alundum® AN-889 | Medium | 5.0 microns | 42% | 85% Al2O3 | 1450°C | 8.6x10-6 | ||
Alundum® AN-485 | Coarse | 20.0 microns | 47% | 85% Al2O3 | 1450°C | 8.6x10-6 | ||
Zirnorite® YN-756 | -- | -- | 25% | 92.6% ZrO2 SiO2 | 1590°C | 5.5x10-6 | High |
Saint Gobain pioneered the use of sintered SiC as a seal face in automotive water pumps in the early 1980s. Since then, Hexoloy® SiC has become the leading choice for mechanical seal face and seat material in automotive, chemical, oil & gas, and nuclear power industries. This success is driven by the exceptional hardness, strength, and chemical resistance of Hexoloy sintered SiC. Seal rings for nuclear reactor coolant pumps are also available in Noralide® Si3N4 material.
Area | Unground Seal | Unground Seal Blanks | Ground Seals |
---|---|---|---|
Hexoloy SA | Up to 16” O.D. | Up to 16” O.D. | Up to 16” O.D. |
Hexoloy SP | Up to 16” O.D. | Up to 16” O.D. |
Advantage: | Application: |
|
|
Silit®SK, Siliconized SiC, material can be used as Thermocouple protection tubes, closed on one end. A wide range of diameters (20 m – 80 mm) can be produced with lengths up to 2 m. Tubes with flanges and / or holes are available.
Advantage: |
Application: |
|
|
Hexoloy® SA sintered silicon carbide seal tubes are available in a wide range of OD and ID combinations. Typical length of the seal tube is 12”, through 6” tube is also available. Seal tubes are unground and sold with “as-fired” tolerances.
Low volume Hexoloy® SA sintered silicon carbide blanks are available in a range of OD and ID combinations. Typically the blanks are <1” thick, though thicker blanks are available. High volume blanks (qty >500 pcs) are available as dry-pressed product up to 5.125" OD. Blanks are typically unground and sold with “as-fired” tolerances.
Ground seal faces are available in Hexoloy® SA silicon carbide and Noralide® silicon nitride materials. Both materials are fine-grained and produced to near theoretical density. These attributes impart excellent wear resistance, a key requirement for seal face products. Both materials possess excellent resistance to corrosion from chemicals with a broad range of pH. Seal faces are produced to custom drawings with high quality surface finish.
Applications:
Advantages:
Advantage:
Applications:
Hexoloy® SA Sintered Silicon Carbide Tiles are available in sizes ranging from 2”x2” to 7”x7” with thicknesses from 0.1” to 0.75”. Hexagon shaped tiles are also readily available. One surface can be polished.
Advantages:
Applications:
Advantages:
Applications:
Norbide® B4C nozzles are used in monument construction, water jet cutters, and sandblasting.
Reactor coolant pumps (RCP) for Nuclear Power Plants use highly-engineered seals. These seal faces can be made of Hexoloy® SA, SG and Noralide® Si3N4.
Our products enable long lasting solutions to key automotive parts, such as water pump mechanical seals and heat exchangers.
Semi-conductor wafer grinding and polishing requires use of substrates that are extremely hard, flat and chemically resistant. Hexoloy® SA and SG plates provide superior service in this application.
Our crushable insulators and silicon carbide products enable processing of MIMS thermocouples and components for modern lightweight engines.
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