Extreme-hardness sintered silicon carbide (SSiC) and thermal-shock-proof silicon nitride (Si3N4) wear components, kiln furniture, seal rings, and molten-metal hardware.
Non-oxide structural ceramics excel where oxide ceramics crack from thermal shock or erode in corrosive slurries and molten metals. Pressureless sintered alpha-silicon carbide (SSiC) combines diamond-like hardness (~2,500 HV), high thermal conductivity (>120 W/m·K), and universal acid/alkali resistance up to 1,600 °C in air. Gas-pressure sintered silicon nitride (Si3N4) combines low thermal expansion (3.1 × 10⁻⁶ /K) with high fracture toughness, withstanding direct immersion in molten aluminum and zinc without wetting or thermal-shock failure.
Available as lapped seal rings, wafer-handling paddles, burner tubes, kiln beams, bearing balls, and custom CNC-ground geometries.
| Property / Metric | Nominal Reference Value (Grade Dependent) |
|---|---|
| Vickers Hardness | 2,400–2,600 HV (SSiC) / 1,500–1,650 HV (Si3N4) |
| Thermal Conductivity (RT) | 110–140 W/m·K (SSiC) / 25–35 W/m·K (Si3N4) |
| Bulk Density | 3.10–3.16 g/cm³ (SSiC) / 3.20–3.26 g/cm³ (Si3N4) |
| Thermal Shock ΔT | ~350–450 °C (SSiC) / >750–800 °C (Si3N4) |
| Max Air Service Temp | 1,600–1,650 °C (SSiC) / 1,200–1,350 °C (Si3N4) |
Reference values reflect typical sintered, fused, or wrought grades. Exact batch test figures are confirmed on your written quotation and accompanying lot Certificate of Analysis.
Specify SSiC (zero free silicon for HF/strong acid resistance), RBSiC (economical kiln beams), or sintered Si3N4 (high impact & thermal shock), plus dimensions, lapped flatness (light bands), and operating medium.
Include target quantity, destination country/postal code for express air freight calculation, and any special cleanroom bagging or certification requests.
Prepare Silicon Carbide (SiC) & Silicon Nitride (Si3N4) Parts RFQ ↗Complementary furnaceware, substrates, PVD consumables, and refractory hardware frequently ordered together.
TB-HBN-MCHot-pressed hexagonal boron nitride (h-BN) crucibles, rods, plates, and precision CNC components combining extreme thermal shock resistance, molten-metal non-wetting, and electrical insulation.
TB-ZRO2-CRTransformation-toughened 3Y-TZP structural zirconia parts and ultra-refractory YSZ/Mg-PSZ crucibles, setter plates, and tubes rated up to 2,100 °C.
TB-AL2O3-PLThin tape-cast electronic substrates (96% / 99.6%) and thick precision-ground alumina setter and wear plates with optional laser cutting or CNC machining.
TB-PVD-OXHigh-density hot-pressed and HIP-consolidated oxide, nitride, carbide, and sulfide ceramic sputtering targets (ITO, AZO, ZnO, Al2O3, SiO2, TiO2, BaTiO3) indium-bonded for arc-free RF/pulsed-DC PVD.
Submit your purity grade, geometry, quantity, and documentation requirements. Every order includes the producing mill's batch Certificate of Analysis (COA) and pre-shipment dimensional verification.