Key Performance Features of Silicon Carbide Tube
- High hardness, Rockwell hardness is 91 HRA, Vickers hardness is 2391.
- Silicon Carbide ceramic has high temperature resistance, up to 1650°C.
- Silicon Carbide Tube offers a long service life to minimize replacement costs.
- Wide range of applications, suitable for various high-temperature resistant and wear-resistant industries.
- Good corrosion resistance, excellent performance in strong acid and alkali environments (hydrofluoric acid concentration ≤ 20%).
Different Types of Silicon Carbide Tube
Newthink can provide silicon carbide tubes of different shapes, sizes, and processes, which can be applied to various industries.
Widely used in metallurgical sintering furnaces, medium frequency heating forging furnaces, etc.
It is a heat conduction and heat dissipation device with a constant temperature function.
The wear resistance of the silicon carbide elbow can effectively reduce the wear of the pipeline.
Widely used in high temperature measurement in metallurgy, chemical industry, ceramics and other industries.
Why Choose Newthink Silicon Carbide Pipe?
Newthink can produce silicon carbide pipes with various processes to meet the requirements of customers in different industries.
Can provide customized solutions for customers in different industries.
For customers who want to test the quality, we can provide free samples for customers to test.
The longest tube can reach 4 meters.
With ISO certification, we strictly control every step to ensure stable and reliable product quality.
We use high-purity silicon carbide (SiC) raw materials, and the product density is as high as 3.16g/cm³.
We have super high production capacity and can reasonably control production costs to provide customers with the most suitable prices.
Silicon Carbide Tube Production Workshop
Newthink has more than 14 years of advanced ceramic processing technology, which can produce high-precision, high-quality silicon carbide tubes. The advanced nature of the equipment ensures that we can meet the strict tolerance requirements of various industrial applications and provide products that meet the highest precision standards. We have a variety of production processes, including reaction sintering, pressureless sintering, recrystallization, and silicon carbide bonded with silicon carbide (SiC). Different processes can meet the needs of different customers, thus providing customers with comprehensive customized services.
Meet Us at Exhibitions
Newthink actively participates in major industrial and advanced ceramics exhibitions worldwide throughout the year, such as Italy, Germany, Japan, and Vietnam, meeting directly with our customers.
Parameters for Different Types of Silicon Carbide Tubes
Silicon carbide tubes have a variety of processes, and their main performances are as follows:
- Parameter Table
Item | Unit | Data | |||
| RBSiC(SiSiC) | NBSiC | SSiC | RSiC | ||
| Max service temperature | ℃ | 1380 | 1450 | 1650 | 1620 |
| Density | g/cm3 | 3.02 | 2.75-2.85 | 3.08-3.16 | 2.65-2.75 |
| Open porosity | % | 0 | 13-15 | 0 | 15-18 |
| Bending strength 20℃ | Mpa | 250 | 160 | 380 | 100 |
| Bending strength 1200℃ | Mpa | 280 | 180 | 400 | 120 |
| Modulus of elasticity 20℃ | Gpa | 330 | 580 | 420 | 240 |
| Modulus of elasticity 1200℃ | Gpa | 300 | / | / | 200 |
| Thermal conductivity 1200℃ | W/m.k | 45 | 19.6 | 100-120 | 36.6 |
| Coefficient of thermal expansion | K-lx10-6 | 4.5 | 4.7 | 4.1 | 4.69 |
| HV | kg/mm2 | 2115 | / | 2800 | / |
Related Products
Alumina TubesThere are different purities (such as 92%, 96%, 99%), used in high temperature and corrosion resistant environments.
Components to protect sensors in industrial temperature measurement systems.
High temperature resistance, corrosion resistance, good insulation performance can well protect the internal components.
Silicon carbide tubes are the best choice to replace the quartz paddle for the following reasons:
①Performance: Silicon carbide tubes are more resistant to high temperature (even maintain 380MPa bending strength at 1350℃), the thermal expansion coefficient is low (4.0×10^-6/°C), and acid and alkali corrosion resistance is better, and applicable to harsh environments.
②Cost-effectiveness: The cost of silicon carbide tubes is approximately 2-3 times that of quartz paddle, but the service life is 4-8 times that of quartz paddle, and the overall maintenance cost is lowered by 30%.
③Production efficiency: Silicon carbide tubes are durable, can reduce downtime frequency, increase production capacity, and are particularly ideal for large-scale continuous production of semiconductor wafer production lines.
Silicon carbide tubes have very high chemical corrosion resistance. Their crystal structure of a dense covalent bond gives the material very high chemical inertness. They not only withstand long immersion in severe acids such as hydrochloric acid and nitric acid and severe bases such as sodium hydroxide, but also withstand corrosive gas erosion from gases such as chlorine and hydrogen fluoride at high temperatures. They have become essential materials for the production of semiconductors, chemical metallurgy, energy conversion, and other industries to handle vigorous corrosive atmospheres.
Silicon carbide tubes with excellent high temperature resistance (above 1600°C) and chemical stability are used mainly for high temperature exhaust pipes and material conveying pipes for industrial furnaces, high temperature diffusion furnace gas carrier pipes for silicon wafer production in the photovoltaic industry, and heat exchange pipes for molten salt energy storage systems. In the meantime, silicon carbide tubes can also be used in high-level manufacturing industries. As the critical components of high-temperature diffusion furnaces in the process of manufacturing photovoltaic silicon wafers, they ensure process stability above 1200°C. They are used as temperature-measuring protection tubes for high-temperature components of engines in aerospace. With their “high temperature resistance + corrosion resistance + high thermal conductivity” characteristics, they have been used as significant functional components under harsh working conditions in diverse industries.
Different manufacturing techniques for silicon carbide tubes exist to satisfy various application requirements.
① Reaction sintering of silicon carbide. It is of medium density, low porosity, and small free silicon content (5%-15%). Its biggest advantage is low price, easy moldability, and high cost performance.
② Silicon carbide bonded silicon nitride (Si₃N₄). Silicon nitride (Si₃N₄) is the bonding phase to strongly bonds silicon carbide (SiC) particles. Free silicon has a maximum temperature resistance of 1450°C, suitable for the aluminum processing industry.
③ Pressureless sintered silicon carbide. It has high density and strength, high cost performance, and a maximum temperature resistance of 1650°C. It uses high-purity silicon carbide powder (purity ≥99%) and adds a small amount of sintering aids (e.g., B, C) under high-temperature sintering (2000-2200°C) at normal pressure. Density is ≥99%, but the cost is high.
④ Recrystallized silicon carbide (SiC). Produced by high-temperature vapor deposition or recrystallization process, it is directly bonded by silicon carbide crystals completely (without binding phase), and the maximum operation temperature can be as high as 1600°C (in an oxidizing atmosphere), which is suitable for higher-temperature applications.
