Recrystallized Silicon Carbide RSiC Porous Columnar Ceramic Module

With a SiC content of ≥99%, this material features a distinct chemical composition. Since no oxide sintering aids (such as silica or alumina) are added, the material is completely free of glassy phases. This ensures it will never experience liquid-phase softening under extreme heat. Meanwhile, the Apparent Porosity of ≤17% creates a highly controlled micro-pore network, ensuring excellent fluid permeability while providing superior resistance to liquid/gas penetration and erosion—without any risk of impurity leaching.

This is the core advantage distinguishing RSiC from common Reaction-Bonded SiC (RBSiC) or Silicon Nitride-bonded SiC. Its Flexural Strength at 20°C is 90–100 MPa, with a Crushing Strength of 300 MPa. Remarkably, at 1200°C, its Flexural Strength increases to 100–110 MPa. This unique "high-temperature strengthening effect" guarantees that the columnar module maintains absolute structural rigidity and dimensional stability when operating above 1600°C.

• A low Coefficient of Thermal Expansion (at 1200°C: 4.6 * 10⁻⁶/°C) combined with a high Thermal Conductivity (at 1200°C: 35–36 W/m·K) endows the material with outstanding Thermal Shock Resistance.
• Engineering Significance: Even under severe thermal cycling—such as frequent industrial furnace start-ups/shut-downs or abrupt temperature fluctuations in fluid streams—the module resists macroscopic cracking, dramatically extending its operational lifespan.

During the casting of molten aluminum, copper, or zinc, the module's micro-pores capture non-metallic inclusions (such as oxide films and dross). With a ≥99% purity, it ensures that no harmful impurity elements (e.g., iron, calcium) are released into the liquid metal during prolonged high-temperature contact. This significantly enhances the internal metallurgical quality and mechanical properties of castings. Furthermore, its exceptional thermal shock resistance perfectly withstands the abrupt thermal gradients when molten metal is poured in.

Serving as a high-temperature ceramic filter, it directly captures fine particulates from industrial furnace exhaust at over 1200°C, protecting downstream heat recovery boilers. Due to the absence of glassy phases, RSiC delivers strong resistance to acid and alkali corrosion, enabling long-term operation in atmospheres rich in SO₂, HCl, and alkali metal vapors. Additionally, its high thermal conductivity prevents localized ash accumulation and overheating, safeguarding the filter from thermal burnout.

Used as a catalyst carrier for intense endothermic/exothermic reactions such as methane reforming for hydrogen production and methanol-to-olefins. The high thermal conductivity rapidly dissipates reaction heat, ensuring absolutely uniform temperature distribution across the catalytic bed. This prevents local "hot spots" that cause catalyst sintering and deactivation. A high crushing strength of 300 MPa enables the module to withstand continuous high-pressure gas impacts, ensuring long-term reactor stability.

In the manufacturing of monocrystalline silicon, epitaxial growth, and photovoltaic cell diffusion furnaces, the module is employed as wafer carriers (boats), furnace tubes, or gas diffusers. Compared to traditional quartz components, which soften at high temperatures and leach alkali metal impurities (e.g., Na, K), this material—free of sintering additives and releasing zero ionic impurities at high temperatures—is the ultimate "clean carrier" for guaranteeing high chip yields and PV product purity. Moreover, its 1650°C limit significantly surpasses the thermal tolerance of quartz.

In the steel, metallurgy, and chemical industries, these modules are used to recover high-temperature exhaust waste heat (up to 1600°C) to preheat combustion air or fuel gas. The columnar structure maximizes specific surface area, and combined with superior thermal conductivity, achieves highly efficient waste heat recovery. The extremely low coefficient of thermal expansion ensures that the equipment will not suffer from thermal fatigue fracturing under frequent start-stop cycles (thermal cycling).