{"id":2774,"date":"2026-01-19T10:38:19","date_gmt":"2026-01-19T02:38:19","guid":{"rendered":"https:\/\/www.c-adtech.com\/?p=2774"},"modified":"2026-02-27T15:50:57","modified_gmt":"2026-02-27T07:50:57","slug":"reticulated-ceramic-filter-foam-sheet","status":"publish","type":"post","link":"https:\/\/www.c-adtech.com\/ko\/reticulated-ceramic-filter-foam-sheet\/","title":{"rendered":"\ub808\ud2f0\ud058\ub808\uc774\ud2f0\ub4dc \uc138\ub77c\ubbf9 \ud544\ud130 \ud3fc \uc2dc\ud2b8: \uace0\uc628 \uc0ac\uc591, \uc7ac\ub8cc \uac00\uc774\ub4dc"},"content":{"rendered":"

AdTech reticulated ceramic filter foam<\/a> sheets deliver a proven 40% reduction in casting rejection rates while enhancing mechanical property consistency by over 15% in industrial applications. Engineered with a unique open-cell 3D structure, these filtration units provide superior thermal shock resistance and efficient removal of non-metallic inclusions across aluminum, iron, and steel alloys. Foundries utilizing AdTech filtration technology secure stable laminar flow, prevent turbulence, and achieve significantly higher yield rates, directly translating to reduced scrap costs and optimized production cycles for aerospace, automotive, and precision casting sectors.<\/span><\/p>\n

Engineering Principles of Reticulated Ceramic Filter Foam<\/span><\/h2>\n

Understanding the structural integrity of a <\/span>reticulated ceramic filter foam sheet<\/span><\/strong> requires examining its internal geometry. Unlike extruded strainers or fiberglass mesh, these filters possess a tortuous path structure that mimics a three-dimensional labyrinth. This geometric configuration forces molten metal to change direction multiple times during passage. The resulting flow dynamic increases the probability of capturing micron-sized inclusions through three distinct mechanisms: screening, filter cake formation, and deep-bed filtration.<\/span><\/p>\n

Foundry engineers prioritize this material because of its high porosity range, typically between 80% and 90%. Such high void fractions ensure that the filter imposes minimal pressure drop on the metal flow while maintaining maximum specific surface area for inclusion adsorption. AdTech manufactures these sheets using a polymeric sponge method, where organic foam is impregnated with ceramic slurry, dried, and sintered at high temperatures. The result is a robust ceramic skeleton free from organic residues, capable of withstanding extreme metallurgical environments.<\/span><\/p>\n

\"Reticulated
Reticulated Ceramic Filter Foam Sheet<\/figcaption><\/figure>\n

Mechanisms of Inclusion Removal<\/span><\/h3>\n

The efficiency of a ceramic foam filter relies on physical and chemical interactions. Large particles are physically blocked at the filter face. Smaller particles, however, become trapped within the internal web of the ceramic matrix.<\/span><\/p>\n

    \n
  1. \n

    Surface Sieving:<\/span><\/strong> Particles larger than the pore diameter are halted immediately at the intake face.<\/span><\/p>\n<\/li>\n

  2. \n

    Cake Filtration:<\/span><\/strong> As large particles accumulate, they form a secondary filter layer that captures finer impurities.<\/span><\/p>\n<\/li>\n

  3. \n

    Depth Filtration:<\/span><\/strong> The most critical mechanism involves the adsorption of tiny inclusions (down to a few microns) onto the ceramic cell walls due to surface tension and chemical affinity.<\/span><\/p>\n<\/li>\n<\/ol>\n

    Also read: Ceramic Foam Filter Manufacturing Process<\/a>.<\/p>\n

    Material Classifications and Application Suitability<\/span><\/h2>\n

    Selecting the correct <\/span>reticulated ceramic filter foam sheet<\/span><\/strong> depends entirely on the alloy being cast. Temperature thresholds and chemical compatibility dictate the base material. AdTech produces three primary categories to cover the spectrum of metallurgical needs.<\/span><\/p>\n

    Table 1: Ceramic Material Selection Matrix<\/span><\/strong><\/p>\n

    \n\n\n\n\n\n\n
    Material Composition<\/span><\/td>\nCommon Name<\/span><\/td>\nMax Temperature<\/span><\/td>\nTarget Alloy<\/span><\/td>\nColor Indicator<\/span><\/td>\nKey Characteristic<\/span><\/td>\n<\/tr>\n
    Alumina (Al2O3)<\/span><\/strong><\/a><\/td>\nAlumina CFF<\/span><\/td>\n1200\u00b0C<\/span><\/td>\nAluminum & Alloys<\/span><\/td>\nWhite \/ Pink<\/span><\/td>\nHigh resistance to molten aluminum corrosion.<\/span><\/td>\n<\/tr>\n
    Silicon Carbide (SiC)<\/span><\/strong><\/td>\nSiC CFF<\/span><\/td>\n1500\u00b0C<\/span><\/td>\nGrey & Ductile Iron<\/span><\/td>\nGrey \/ Black<\/span><\/td>\nSuperior thermal shock resistance and strength.<\/span><\/td>\n<\/tr>\n
    Zirconia (ZrO2)<\/span><\/strong><\/td>\nZirconia CFF<\/span><\/td>\n1700\u00b0C<\/span><\/td>\nCarbon & Stainless Steel<\/span><\/td>\nYellow \/ Brown<\/span><\/td>\nExtreme heat tolerance and chemical inertness.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Procurement managers must match these specifications to their furnace output. Using an Alumina filter for iron casting will result in immediate catastrophic failure due to temperature limits, whereas using Zirconia for aluminum is economically inefficient despite technical feasibility.<\/span><\/p>\n

    \"Material
    Material classification of ceramic foam filter plate<\/figcaption><\/figure>\n

    Optimizing Pore Density (PPI) for Flow Control<\/span><\/h2>\n

    Pore density is measured in Pores Per Linear Inch (PPI). This metric defines the filtration precision and the flow rate capacity of the <\/span>reticulated ceramic filter foam sheet<\/span><\/strong>. A higher PPI number indicates smaller pores and finer filtration but introduces higher resistance to flow.<\/span><\/p>\n

    Balancing Filtration Precision with Pouring Speed<\/span><\/h3>\n

    Engineers often face a trade-off between cleanliness and mold filling time. If the filter is too restrictive, the mold may not fill before the metal solidifies (cold shuts). If the filter is too open, impurities pass through.<\/span><\/p>\n

      \n
    • \n

      10-20 PPI:<\/span><\/strong> Used for large castings or metals with high viscosity where rapid filling is critical. It removes gross impurities like slag and dross.<\/span><\/p>\n<\/li>\n

    • \n

      30-40 PPI:<\/span><\/strong> The standard for most automotive and general machinery castings. It offers a balanced removal of mid-sized inclusions without severely impeding flow.<\/span><\/p>\n<\/li>\n

    • \n

      50-60 PPI:<\/span><\/strong> Reserved for high-value, critical components such as aerospace parts or thin-walled electronic housings where microscopic cleanliness is mandatory.<\/span><\/p>\n<\/li>\n<\/ul>\n

      Table 2: AdTech Recommended PPI Utilization<\/span><\/strong><\/p>\n

      \n\n\n\n\n\n\n\n\n
      PPI Rating<\/span><\/td>\nPore Size (mm)<\/span><\/td>\nFlow Rate Factor<\/span><\/td>\nRecommended Application<\/span><\/td>\n<\/tr>\n
      10 PPI<\/span><\/strong><\/td>\n1.8 – 2.5<\/span><\/td>\nHigh<\/span><\/td>\nLarge Engine Blocks, Heavy Machinery Bases<\/span><\/td>\n<\/tr>\n
      20 PPI<\/span><\/strong><\/a><\/td>\n1.2 – 1.8<\/span><\/td>\nMedium-High<\/span><\/td>\nSand Casting, Manifolds, Brake Rotors<\/span><\/td>\n<\/tr>\n
      30 PPI<\/span><\/strong><\/a><\/td>\n0.9 – 1.2<\/span><\/td>\nMedium<\/span><\/td>\nCylinder Heads, Gearboxes, Valves<\/span><\/td>\n<\/tr>\n
      40 PPI<\/span><\/strong><\/td>\n0.7 – 0.9<\/span><\/td>\nMedium-Low<\/span><\/td>\nPrecision Aviation Parts, Turbochargers<\/span><\/td>\n<\/tr>\n
      50+ PPI<\/span><\/strong><\/td>\n0.5 – 0.7<\/span><\/td>\nLow<\/span><\/td>\nFoil Rolling Slabs, Electronics Heatsinks<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

      Reducing Turbulence and Laminar Flow Benefits<\/span><\/h2>\n

      Beyond capturing solids, AdTech filters serve a hydrodynamic function. Molten metal poured from a ladle creates turbulence. Turbulent flow entraps air and causes oxidation, leading to oxide film defects. When metal passes through the <\/span>reticulated ceramic filter foam sheet<\/span><\/strong>, the complex network rectifies the flow.<\/span><\/p>\n

      The stream exits the filter as a laminar (smooth) flow. Laminar filling reduces erosion of the sand mold and prevents the re-entrainment of inclusions. This flow rectification is often cited by process engineers as equally valuable to the filtration itself, particularly in gravity die casting and low-pressure casting setups.<\/span><\/p>\n