Porous alumina ceramics are porous structural materials formed by sintering high-purity alumina (Al ₂ O3) through special processes. Its core advantage lies in the balance between density and porosity: it inherits the high hardness (Rockwell hardness HRA80-90), high temperature resistance (above 1600 ℃), corrosion resistance (resistant to strong acids and alkalis), and insulation properties (resistivity>10 ¹⁴Ω· cm) of alumina ceramics, while endowing it with unique physical and chemical properties through porous design.
Example of Key Parameters:
多孔性： 20% -60% (customizable)
Pore size range: 0.1 μ m-500 μ m (micropores, mesopores, and macropores can be graded and controlled)
密度が高い： 2.5-3.5g/cm ³ (only one-third of steel)
熱伝導率： 0.5-5W/(m · K) (low thermal conductivity for efficient insulation)
Typical structures: honeycomb, foam, particle accumulation, mesh structure, etc., which can be flexibly designed according to the application scenario.
Core application areas: from extreme environments to precision manufacturing
- Semiconductor manufacturing: the “shield” of extreme processes
Application Scenario:
エッチング装置： As an inner lining or protective ring of the cavity, the porous structure can adsorb metal impurities in the plasma, reduce wafer contamination, and improve yield. For example, in a 12 inch wafer etching machine, the metal contamination rate decreased from 0.3% to 0.05% after using a porous alumina ceramic liner.
Chemical mechanical polishing (CMP): The polishing table uses porous alumina ceramics to store polishing solution through pores, achieving uniform liquid supply and reducing wafer surface roughness (Ra<0.2nm).
Ion implantation: As a beam baffle, the porous structure can disperse high-energy ion beams, avoiding equipment damage caused by local overheating.
ペインポイントに対処する：
Traditional metal components are prone to plasma corrosion and have a lifespan of only 3-6 months; The lifespan of porous alumina ceramics is extended to over 3 years.
Reduce the frequency of equipment downtime maintenance, saving over 2 million yuan in annual costs for a single production line. - Chemical and Metallurgical: A “Green Filter” for High Temperature Corrosion
Application Scenario:
Molten metal filtration: The porous alumina ceramic filter can intercept impurities (such as alumina particles and nitrides) with a diameter greater than 50 μ m in steel water, with a filtration efficiency of over 98%. For example, in the continuous casting process of a certain steel plant, the internal defect rate of the steel billet decreased from 1.2% to 0.3% after use.
触媒担体： The pore structure provides a super large specific surface area (>100m ²/g), which is used as a catalyst carrier for automobile exhaust treatment and can improve NOx conversion efficiency by 15% -20%.
Thermal insulation refractory material: Porous alumina ceramic bricks are used for lining high-temperature kilns, with a thermal conductivity as low as 0.8W/(m · K) and significant energy-saving effects.
ペインポイントに対処する：
Traditional ceramic filters are corroded by molten metal, while porous alumina ceramics can be reused more than 50 times, reducing consumable costs.
Reducing energy consumption, a single kiln can save over 500000 yuan in natural gas costs annually. - Energy and Environmental Protection: Efficient and Energy saving “Smart Chips”
Application Scenario:
熱交換器： Porous alumina ceramic tubes are used for the recovery of waste heat from flue gas in steel rolling heating furnaces. Through thermal radiation feedback within the pores, the thermal efficiency is increased by 30%.
Fuel cell separator: As the electrolyte support of solid oxide fuel cells (SOFCs), the porous structure can reduce the voltage of the electrolytic cell and improve power generation efficiency.
Battery isolation plate: a substitute for traditional organic materials, used for lithium-ion batteries to extend their lifespan.
ペインポイントに対処する：
Traditional metal heat exchangers are easily corroded by high-temperature flue gas, and the lifespan of porous alumina ceramics is extended to over 5 years.
Improving energy efficiency, a single heating furnace can reduce carbon dioxide emissions by about 200 tons per year. - Biomedical: A “second layer of bone” compatible with the human body
Application Scenario:
Bone repair material: Porous alumina ceramic scaffold (pore size 100-300 μ m) can guide bone cell growth and achieve bone tissue regeneration. Clinical data shows that the bone fusion rate reaches 95% 6 months after implantation.
Enzyme immobilization carrier: used in bioreactors to immobilize enzymes with high activity and enhance biochemical reaction rates.
ペインポイントに対処する：
Traditional metal implants are prone to rejection reactions, while porous alumina ceramics have excellent biocompatibility and reduced postoperative infection rates.
Customized service: full process support from design to mass production
- Structural customization: Accurately matching application requirements
Porosity regulation: By adjusting the content of sintering aids (such as MgO, Y ₂ O3), precise control of porosity within the range of 20% -60% can be achieved.
Pore size grading design: Using processes such as foaming and freeze-drying, microporous (<2nm), mesoporous (2-50nm), and macroporous (>50nm) grading structures are prepared to meet different filtration accuracy requirements.
Complex Shape Forming: Supports CNC precision machining, 3D printing and other technologies, and can customize irregular parts (such as non-standard size filter plates, curved lining). - Performance optimization: Breaking through material limits
高純度アルミナ： available in 99.6%, 99.9%, and 99.99% purity options to meet semiconductor grade application requirements.
表面改質： Through processes such as plasma spraying and chemical plating, functional coatings (such as hydrophobic coatings and catalytic coatings) are deposited on pore surfaces to expand application scenarios.
Composite material development: Composite with materials such as aluminum nitride and silicon carbide to improve thermal conductivity or mechanical strength.
If you are looking for a reliable, efficient, and durable solution to address filtration, diffusion, or separation challenges in high-temperature, corrosive environments, our porous alumina ceramic components will be your ideal choice.
Feel free to contact us anytime and discuss your specific needs with our engineers.
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