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In the bronze casting process, the use of silicon carbide ceramic foam filter material is of SiC.
Steel castings uses zirconia ceramic foam filters. Zirconia ceramic foam filters material of ZrO2 zirconia. Zirconia heat-resistant temperature of the filter is higher than about 1760 ° C, with very high strength and excellent high-temperature impact.
Alumina ceramic foam filter products effectively remove solid-state mixed with the molten metal, so aluminum alloy can be successfully forged, aluminum foil manufacturing, extrusion processing technology, perfect aluminum products. 10ppi coarse porosity 70ppi of fine porosity range of options.
| Foam ceramic material | Alumina | Silicon Carbide | Zirconium Oxide |
| Application | Alumina or aluminium alloy casting | Iron or iron alloy casting | Steel, stainless steel and synthetic steel casting |
| Holes density (ppi) | 10 to 50 | 10 to 45 | 10 to 30 |
| Open porosity(%) | 80-90 | 80-90 | 80-90 |
| Working temperature (0C) | 1200 | 1500 | 1750 |
| Thermal shock resistance (times/11000C) | >6 | >6 | >7 |
| Compressive strength (Mpa) | 0.8 | 0.9 | 0.8 to 1.0 |
| Bending strength (Mpa) | 0.6 | 0.8 | 1.0 to 1.2 |
| Dimension tolerance | 0.5mm | 0.5mm | 0.5mm |
The primary types include Silicon Carbide (SiC), Zirconia (ZrO2), Alumina, and Magnesium Oxide foam ceramic filters, each suited for different molten metal filtration needs.
Alumina Ceramic Foam Filters are specially designed for aluminum and aluminum alloy casting, effectively removing solid-state impurities at working temperatures up to 1200°C.
Zirconia Ceramic Foam Filters can handle working temperatures up to 1700°C, with a heat-resistant capability exceeding 1760°C, making them ideal for steel and stainless steel castings.
Hole densities vary depending on the material: Alumina ranges from 10 to 50 PPI, Silicon Carbide from 10 to 45 PPI, and Zirconia from 10 to 30 PPI.
All main ceramic foam filter materials (Alumina, Silicon Carbide, and Zirconium Oxide) offer an open porosity rate of 80% to 90% for high filtration performance.
