Ground silicon carbide seal rings
Spiral-vane ceramic ring component
Ground silicon carbide square plate with center hole
Black silicon carbide flanged nuts
Silicon carbide square wear plate with mounting holes
Honeycomb ceramic filters for molten metal filtration
  1. Ground silicon carbide seal rings
  2. Spiral-vane ceramic ring component
  3. Ground silicon carbide square plate with center hole
  4. Black silicon carbide flanged nuts
  5. Silicon carbide square wear plate with mounting holes
  6. Honeycomb ceramic filters for molten metal filtration

Reaction Bonded Silicon Carbide (RBSiC): Precision Near-Zero Shrinkage Engineering Ceramics for Complex Large-Scale Structural, Thermal, and Abrasive Service

Fabricated via high-temperature liquid silicon infiltration of a compacted alpha-SiC and carbonaceous matrix under vacuum (>1,500°C), Reaction Bonded Silicon Carbide (RBSiC / SiSiC) achieves complete densification with near-zero firing shrinkage (<0.1%). Containing 85–90% SiC and 10–15% secondary free metallic silicon, RBSiC delivers superior dimensional accuracy for large-scale, complex geometric structures (up to 4,000 mm beams and heavy-walled tubes). With exceptional thermal shock resistance, flexural strength of 250–300 MPa, continuous thermal resistance up to 1,380°C, and exceptional slurry abrasion durability, it serves as the benchmark cost-effective solution for industrial kiln furniture, FGD desulfurization spray nozzles, and severe mining wear liners.

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Ground silicon carbide seal rings

Key Technical Advantages & Core Engineering Value

  • Near-Zero Sintering Shrinkage & Complex Net-Shape Formability: Exhibits sintering dimensional change under 0.1%, eliminating distortion and cracking while allowing slip casting or extrusion of ultra-large, complex structural shapes (beams, rollers, nozzles) with minimal finish-grinding costs.

  • Thermal Shock Resistance & High Thermal Dissipation: Bulk thermal conductivity reaching 45–100 W/(m·K) paired with a low coefficient of thermal expansion (4.2–4.5 × 10⁻⁶/K) prevents thermal stress concentration, supporting rapid temperature ramping and cyclic thermal quenching (ΔT > 300°C).

  • Refractory Load-Bearing Rigidity up to 1,380°C: Retains flexural strength of 250–300 MPa and elastic modulus over 330 GPa across prolonged industrial duty cycles up to 1,380°C, showing zero creep, sagging, or bending under heavy mechanical kiln payloads.

  • Severe Slurry Abrasion & Particle Erosion Resistance: With a Mohs hardness of 9.2–9.5 and dense microcrystalline phase interlocking, RBSiC outperforms high-chrome wear cast iron and polyurethane by 5 to 8 times in abrasive slurry transport and cyclone classification.

  • Broad Chemical Resistance & Slag Passivation: Forms a self-passivating amorphous silica barrier under high-temperature oxidative atmospheres, completely repelling non-ferrous molten metal wetting and resisting corrosive mineral acids (HF and strong hot alkalis excluded).

Quantitative Material Specification Sheet

Physical / Mechanical / Thermal Property Test Standard Unit Typical Value (RBSiC / SiSiC)
Material Composition XRD / Chemical Extraction wt% 85 – 90% SiC (α + β phase) + 10 – 15% Free Si
Bulk Density ASTM C373 / ISO 18754 g/cm³ 3.02 – 3.08 (Theoretical: 3.10 g/cm³)
Open Porosity Archimedes Water Displacement % < 0.1 (Hermetic Liquid Infiltration)
Sintering Firing Shrinkage Dilatometry / Gauge Measurement % < 0.1 (Net-Shape Precision)
Flexural Strength (Room Temp, 25°C) ASTM C1161 (3-Point/4-Point) MPa 250 – 300
Flexural Strength (Elevated, 1,300°C) High-Temp 4-Point Bending MPa 260 – 310 (No High-Temperature Loss)
Compressive Strength ASTM C773 MPa > 2,000
Elastic Modulus (Young’s Modulus) ASTM C1259 (Resonance Method) GPa 330 – 360
Vickers Hardness (HV1) ASTM C1327 GPa / HV 20.0 – 22.0 (2,000 – 2,200 HV)
Mohs Hardness Mineralogical Scratch Test — 9.2 – 9.5
Poisson’s Ratio Ultrasonic Pulse-Echo — 0.17 – 0.19
Thermal Conductivity (25°C) ASTM E1461 (Laser Flash) W/(m·K) 45 – 100 (Grade Dependent)
Coefficient of Thermal Expansion (20–1,000°C) ASTM E228 (Dilatometry) 10⁻⁶/K 4.2 – 4.5
Thermal Shock Parameter (ΔT) Water Quench Method °C 300 – 350
Max. Continuous Operating Temp (Air) High-Temp Thermal Aging °C 1,380 (Silicon Melting Limit at 1,410°C)
Electrical Resistivity (25°C) ASTM D257 Ω·cm 10⁻¹ – 10² (Semi-Conductive Phase)

Mission-Critical Applications & Industry Use-Cases

1. High-Temperature Industrial Kiln Furniture & Combustion Systems

  • Components: Cross-beams (up to 4 meters), roller rods, burner nozzles, cooling air pipes, and batt supports.

  • Technical Value: The high modulus and creep resistance of RBSiC eliminate beam sagging and bending deformation in tunnel and shuttle kilns firing sanitary ware, electronic ceramics, and daily porcelain, dramatically increasing kiln loading volume and fuel energy efficiency.

2. Thermal Power Generation, Flue Gas Desulfurization (FGD), & Environmental Protection

  • Components: FGD slurry spray nozzles (tangential hollow cone, spiral, dual-direction vortex), and aerator tubes.

  • Technical Value: Direct resistance to acidic gypsum slurries containing suspended chloride ions, quartz sands, and limestone particles. Resists micro-particle cavitation and erosion, preserving spray atomization angles and droplet distributions over years of continuous maintenance-free operation.

3. Heavy Mining, Mineral Processing, & Hydrocyclone Classifiers

  • Components: Hydrocyclone liners, apex nozzles, vortex finders, wear tiles, slurry pump impellers, and feed pipe sleeves.

  • Technical Value: Offers extreme abrasion resistance against coarse iron ore, gold tailings, and coal-washing slurries. Eliminates premature blowout failures common in rubber-lined and high-chrome alloy components, cutting unscheduled downtime.

4. Metallurgical Heat Treatment, Radiative Heating, & Non-Ferrous Casting

  • Components: Gas radiant inner and outer tubes, flame flame-guides, thermocouple protection tubes, and molten zinc/lead pump parts.

  • Technical Value: Exceptional thermal conductivity ensures rapid, uniform thermal transfer along the entire radiant tube length, preventing hot-spot blowout while remaining completely non-wetted by molten zinc, aluminum alloys, and casting dross.

Engineering Consultation & Request for Quote (CTA)

Maximize Structural Reliability in Large-Scale Thermal and Abrasive Equipment: Break free from the sizing limitations and exorbitant finish-grinding costs of oxide and pressureless sintered ceramics. Our materials engineering group specializes in custom slip casting, automated extrusion, and vacuum infiltration for parts spanning up to 4 meters in length. We provide comprehensive thermal-mechanical stress modeling, finite element analysis (FEA), and precision diamond-grinding to ±0.005 mm. Contact our senior technical team today for a Design-for-Manufacturing (DFM) review or to request sample evaluations.

  • Engineering Support:baron@artec-adceramics.com