Recrystallized Silicon Carbide (ReSiC) Flat-Sheet Ceramic Membrane
Product Overview
This high-precision filtration membrane is manufactured from
high-purity silicon carbide fine powders through a
recrystallization sintering process. It features high flux,
excellent corrosion resistance, easy cleaning, and long service
life.
The recrystallization process involves mixing coarse high-purity
SiC powder with highly reactive SiC micropowder, followed by vacuum
sintering at elevated temperatures to induce recrystallization.
This yields a high-purity silicon carbide material with no
intermediate bonding phase, providing outstanding high-temperature
mechanical properties, chemical stability, and thermal shock
resistance.
Key Performance Parameters
| Property | Unit | Value |
|---|
| Chemical composition (SiC content) | % | ≥99 |
| Bulk density | g/cm³ | 2.65–2.75 |
| Apparent porosity | % | ≤17 |
| Modulus of rupture at 20 °C | MPa | 90–100 |
| Modulus of rupture at 1200 °C | MPa | 100–110 |
| Crushing strength at 20 °C | MPa | 300 |
| Hardness | kg/mm² | 1800–2000 |
| Fracture toughness | MPa·m¹/² | 1.8–2.0 |
| Thermal conductivity at 1200 °C | W/(m·K) | 35–36 |
| Coefficient of thermal expansion at 1200 °C | *10⁻⁶/°C | 4.6 |
| Thermal shock resistance at 1200 °C | — | Very Good |
| Maximum working temperature | °C | 1650 (oxidising atmosphere) |
Technical Advantages
Ultra-High Purity and Chemical Stability
With a SiC content of ≥99% and no intergranular bonding phase, the
material exhibits exceptional chemical stability. It withstands
extreme pH environments (pH 1–14) and is resistant to all organic
solvents, making it reliably operable in strong acids, strong
alkalis, and a wide range of corrosive media over prolonged
periods.
Superior High-Temperature Performance
Compared with conventional polymer membranes and oxide-based
ceramic membranes, the recrystallized silicon carbide material
demonstrates remarkable behavior at elevated temperatures:
- Strength increases with temperature – the modulus of rupture rises from 90–100 MPa at 20°C to 100–110
MPa at 1200°C, a rare characteristic among ceramic materials
- Excellent thermal conductivity – reaching 35–36 W/(m·K) at 1200°C, which facilitates efficient
heat transfer and dissipation in high-temperature processes
- Outstanding thermal shock resistance – capable of withstanding rapid temperature fluctuations without
cracking, making it ideal for processes with frequent
start-up/shutdown or variable thermal conditions
- Maximum working temperature of 1650°C (in oxidising atmospheres), far exceeding the limits of ordinary
ceramic and organic membranes
Excellent Mechanical Properties
The membrane offers high hardness (1800–2000 kg/mm²), good fracture
toughness (1.8–2.0 MPa·m¹/²), and a crushing strength of 300 MPa.
These robust mechanical attributes ensure structural integrity and
long-term durability under high-pressure, high-flow, and
particulate-laden conditions.
High Efficiency and Energy Savings
The recrystallized silicon carbide material possesses inherent
hydrophilicity and a highly porous, interconnected pore structure,
enabling high permeate flux. The high flux translates to a smaller
equipment footprint and lower energy consumption per unit of
treated volume. Moreover, the membrane surface resists fouling,
allowing more efficient backwashing and clean-in-place procedures,
thus simplifying maintenance and reducing downtime.
Application Fields
Leveraging the above performance advantages, this recrystallized
silicon carbide plate ceramic membrane is widely applicable in:
- Environmental & Water Treatment – municipal wastewater treatment, industrial wastewater treatment
and reuse, seawater desalination pretreatment, and oily emulsion
wastewater treatment
- Chemical & Petrochemical Industries – oil-water separation in petroleum refining and coal chemical
processes, coal-slurry water treatment, and filtration of
acidic/alkaline media
- Food & Beverage – clarification and filtration of fruit juices, wines, and
beverages; as well as degerming and concentration of dairy products
- Biopharmaceutical – fermentation broth clarification, antibiotic purification, and
extraction/purification of active ingredients from traditional
Chinese medicines
- New Energy & Advanced Materials – ultra-fine separation of nanomaterials, lithium-battery
materials, graphene, and other advanced particulates
Summary
This recrystallized silicon carbide plate ceramic membrane, with
its ≥99% purity, 1650°C temperature tolerance, superior
high-temperature mechanical performance, and excellent chemical
stability and thermal shock resistance, offers distinct
technological benefits in advanced filtration and separation
applications. Whether facing extreme conditions such as high
temperature or strong corrosion, or pursuing high-flux, long-life
operation, this product provides a reliable and cost-effective
solution for diverse industrial needs.
