1. Product Introduction
Our Recrystallized Silicon Carbide (RSiC) Protection Tubes are high-performance industrial ceramics sintered via advanced binder-free recrystallization technology. Featuring a dense, zero-porosity monolithic structure, they deliver exceptional high-temperature stability, thermal shock resistance and chemical inertness. Specially designed to protect thermocouples and high-temperature furnace components, RSiC tubes effectively resist flame impact, molten liquid erosion and atmospheric corrosion. Outperforming conventional alumina and bonded SiC tubes, they serve as a cost-effective, reliable solution for harsh high-temperature industrial scenarios.
2. Technical Parameters
We provide standard and customized RSiC protection tubes to fit diverse working conditions. Key specifications are as follows:
Material: 100% pure recrystallized SiC, binder-free & impurity-free
Bulk Density: ≥3.1 g/cm³
Continuous Temp Resistance: 1700℃ (oxidizing); 1800℃ (inert atmosphere)
Peak Temp Resistance: Up to 1850℃
Thermal Conductivity: 120 W/m·K (excellent heat transfer)
Thermal Expansion Coefficient: 4.5×10⁻⁶/℃ (minimal high-temp deformation)
Mohs Hardness: 9.5 (superior wear resistance)
Bending Strength: 600–1000 MPa (stable high-temp mechanical performance)
Thermal Shock Resistance: Crack-free under 200℃/min rapid temperature change
Service Life: ≥2000h continuous operation @1450℃ (oxidizing environment)
Custom Size Range: OD 10–200mm, wall thickness 2–15mm, length 50–3000mm
Surface Treatment: Precision polished, anti-adhesive and easy to clean
3. Product Advantages
Superior High-Temp Stability: Binder-free recrystallized structure ensures no softening, deformation or peeling under ultra-high temperatures, delivering long-term stable operation.
Excellent Thermal Shock Resistance: Low thermal expansion and high thermal conductivity enable stable performance under frequent rapid heating & cooling, avoiding cracking failure for intermittent furnaces.
Strong Corrosion & Oxidation Resistance: Inert pure SiC crystal resists oxidation, acid-base corrosion and molten metal erosion, compatible with air, reducing gas, nitrogen and argon without contamination.
Accurate Temperature Response: High thermal conductivity ensures fast and uniform heat conduction, improving temperature measurement and control accuracy.
Long Lifespan & Low Cost: 3–5 times longer service life than alumina and bonded SiC tubes, reducing replacement frequency and operational downtime cost.
High Purity & Zero Pollution: Pure raw material and binder-free process avoid secondary pollution, suitable for high-purity material production.
4. Application Scenarios
Thanks to reliable high-temperature and anti-corrosion performance, our RSiC tubes are widely used in industrial and scientific high-temperature fields:
Metallurgy & Foundry: High-temperature temperature measurement for molten steel, aluminum, copper and other non-ferrous metals, forging and sintering furnaces
New Energy: Lithium battery material sintering, polysilicon casting and photovoltaic material high-temperature treatment
Electronic & Magnetic Materials: High-temperature sintering of magnetic materials, electronic ceramics and capacitor components
Building Materials & Ceramics: Ceramic roller kilns, glass melting furnaces and refractory material testing
Chemical Industry: High-temperature cracking furnaces and thermal reaction equipment under corrosive atmospheres
Laboratory Research: Tube furnaces, atmosphere furnaces and precision thermal analysis instruments
5. Customization Services
We provide one-stop customized solutions for non-standard equipment and special working conditions:
Size Customization: Custom OD, ID, wall thickness and length; support ultra-long and special-size tubes
Structural Customization: Opening, threading, flanging, flat/round head, stepped tube and special shaping
Precision Processing: Fine grinding, polishing and cutting for tight dimensional tolerance
Performance Customization: Enhanced corrosion resistance or thermal shock resistance for harsh conditions
Supporting Customization: Custom export packaging, fixing accessories and technical documents
Free technical evaluation, drawing confirmation and rapid prototyping are available to meet your customized demands.
6. Global Export
With standardized production and mature global trade service system, our RSiC tubes are well recognized by worldwide industrial customers:
Stable Mass Production: Automated sintering lines with annual output over 100,000 pieces, supporting bulk orders and long-term stable supply
Global Market Coverage: Exported to 50+ countries across Europe, America, Southeast Asia, Middle East and South America
Authorized Certification: ISO9001 certified, supporting third-party inspection and complete customs clearance documents
Full-Process Export Service: One-stop service including inspection, customs declaration, freight arrangement and order tracking
Fast Global After-Sales: Overseas warehouses and technical teams provide timely local support
7. FAQ
Q1: What is the difference between RSiC protection tube and ordinary alumina protection tube?
A1: RSiC tubes adopt binder-free pure SiC structure, supporting 1700℃ continuous operation, higher than 1600℃ of alumina tubes. They feature better thermal shock resistance, faster heat conduction and stronger anti-corrosion performance, with 3–5 times longer service life, ideal for high-temperature and frequent cycling working conditions.
Q2: Can the RSiC protection tube be used in reducing and corrosive atmospheres?
A2: Yes. Pure recrystallized SiC has excellent chemical inertness, resisting oxidation, acid-base corrosion and molten metal erosion. It works stably in reducing gas, nitrogen, argon and other complex atmospheres without contamination or performance degradation.
Q3: Does the product support personalized non-standard size customization?
A3: Yes. We support full non-standard customization of special sizes and structures per customer drawings and working conditions, including ultra-long tubes, reserved holes, threading and stepped shapes. Free optimization suggestion and pre-production proofing are provided.
Q4: What is the main reason for the long service life of RSiC protection tube?
A4: Adopting integral high-temperature recrystallization sintering, the tube forms a dense pore-free structure with ultra-high hardness and stable high-temperature mechanical properties. It resists thermal shock, oxidation and corrosion, avoiding deformation and damage, thus achieving ultra-long cyclic service life.
Q5: What delivery and packaging services are provided for global export orders?
A5: Export orders adopt shockproof wooden case packaging to avoid transit damage. We support sea, air and express delivery, and provide complete inspection reports, certification and customs clearance documents for smooth export.
Q6: Is the RSiC protection tube suitable for intermittent furnace frequent start-stop working conditions?
A6: Highly suitable. Our RSiC tubes withstand rapid temperature changes over 200℃/min and frequent start-stop cycles without cracking or peeling, perfectly adapting to intermittent furnace operation and solving the fragility issue of traditional ceramic tubes.
Q7: What technical after-sales support can we get after purchasing?
A7: We offer full-cycle services: pre-sale working condition matching & model selection, in-sale drawing confirmation & progress tracking, after-sale installation guidance, debugging and warranty. 24/7 online technical support is available for global clients.
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