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May. 25, 2026
Ceramic foam filter is a porous filtering component made from special ceramic materials such as: alumina, silicon carbide, and zirconia that through high-temperature sintering.
It is a dedicated liquid metal purification consumable for the casting industry.
With stable characteristics of high-temperature resistance, anti-corrosion, and anti-corrosion, it can:
● Effectively filter out impurities such as: oxide residues, inclusions, and bubbles in the molten metal,
● Optimize the internal structure of the metal material,
● Reduce defects such as: pores, cracks, and sand holes in the castings,
● And significantly improve the surface smoothness and mechanical properties of the finished products.
High in cost-effectiveness, with a wide range of specifications and styles, and good chemical stability. The upper temperature limit is suitable for aluminum liquid processing conditions, mainly used in various aluminum alloy die-casting and sand casting processes, and is a general-purpose basic filtering product. The material has relatively high brittleness and is not suitable for filtering high-temperature steel or iron molten liquids.
It has excellent high-temperature resistance, thermal shock resistance, wear resistance and erosion resistance. The pores have good permeability and fluidity. It is suitable for molten liquids of medium-high temperature such as: cast iron, copper alloys, and high-temperature aluminum alloys. It is suitable for large castings and continuous large-scale pouring production. It has a long service life and strong adaptability to harsh working conditions.
It has the best thermal resistance, strong toughness, and is resistant to impact and unlikely to break. The filtration accuracy is top-notch. It is specially designed for steel liquid filtration of carbon steel, stainless steel, alloy steel, etc., and is mainly used in high-end precision castings. It can precisely retain tiny impurities and meet the requirements for high-quality casting production.
1. The physical and chemical properties are stable. It does not deform or decompose under high-temperature conditions and will not contaminate the metal raw material solution.
2. Porous and continuous structure, with low filtration resistance and smooth pouring without any blockage of the holes.
3. Resistant to the erosion of molten metal and chemical substances, with low wear and a long service life.
4. Effectively purify impurities in the molten liquid, reduce the defect rate of castings, and improve product quality
5. A wide range of size specifications are available, which can be matched with various molds and pouring processes, and customized processing is supported.
It is widely applied in the casting fields of automotive parts, mechanical hardware, valve and pipe fittings, shipbuilding, precision machinery, etc., covering the production and processing of various metal castings such as: aluminum alloys, cast iron, cast steel, and copper alloys.
1. Comparison of Basic Core Parameters
| Item | Alumina | SIC | Zirconia |
| Material composition ratio | ≥90% Alumina | ≥85% Silicon carbide | ≥95% Zirconia |
| Long-term maximum operating temperature | ≤1100℃ | ≤1550℃ | ≤1700℃ |
| Short-term limit temperature resistance | 1200℃ | 1600℃ | 1750℃ |
| Melting point | 2050℃ | 2730℃ | 2700℃ |
| Moh's hardness | 9 | 9.5 | 8.5 |
2. Key performance comparison
| Item | Alumina | SIC | Zirconia |
| Heat-resistant adaptability | Only applicable to aluminum alloy molten liquid. Excessive temperature may cause damage. | Suitable for cast iron, copper alloys, and high-temperature aluminum liquid | Special for molten steel, suitable for carbon steel, stainless steel and alloy steel. |
| Thermal shock resistance | Large temperature fluctuations, prone to cracking and edge breakage | It is not prone to cracking due to sudden temperature changes and can achieve stable production during continuous operation. | High thermal matching degree, with almost no cracking during start-stop pouring. |
| Impact resistance and durability | High brittleness, prone to cracking upon impact or vibration. | High hardness and good wear resistance, with moderate impact resistance. | The most resilient, resistant to dropping and bending, with the lowest rate of damage. |
| Filtering flow rate flux | The flow rate is stable and suitable for medium and small flow volumes. | The flow rate is the fastest, the throughput is large, and it is not prone to clogging the plates. | The flow rate is moderate and is not suitable for large-scale, rapid pouring. |
| Filtering slag removal accuracy | Regular accuracy, intercepting ordinary slag. | Both coarse and fine impurities can be retained, and it is suitable for large working conditions. | The highest precision, capable of retaining even the tiniest impurities and contaminants. |
| Resistant to erosion and corrosion | Aluminum liquid environment stability | Resistant to erosion by acid and alkali metals, with extremely low wear rate. | Filter in molten steel has good stability. |
We specialize in manufacturing various industrial filter materials, including fiberglass filter mesh, silicon carbide ceramic foam filter and carbon fiber filter products.
Complete specifications meet diverse filtration working conditions.
● With strict quality inspection system, our products sell well overseas.
● Free samples and inspection reports can be provided.
● Both small trial orders and large bulk orders are welcomed.
● Customized production is acceptable. We can adjust size, material and filtration parameters as your requirements.
● We offer considerate logistics support, sincerely hope to build long-term cooperative relationship with you.
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May. 25, 2026
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May. 18, 2026
Contact Us
+86 158 3011 4065
Guoruiyuan Building, ShengLi North Street, Chang'An District, Shijiazhuang City, Hebei Province, China.
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