Questions You Should Know about Aluminium Ceramic Filter Plates

Alumina ceramics are advanced ceramic materials basically composed of aluminum and oxygen. Aluminum oxide ceramics are favored among many manufacturers for a variety of factors, such as high thermal conductivity, their insulating capability, resistance to corrosion, high melting point, and extreme hardness. For these reasons, they are preferred for several manufacturing processes. Here, we’ll discuss the properties, production, and application of alumina ceramics, as well as all other useful pieces of information about alumina ceramic materials. Let’s dive in already!

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What is Alumina Ceramic?

Alumina ceramic, also known as alumina or aluminum oxide (Al2O3), is an industrial oxide ceramic known for its extreme hardness and high thermal conductivity. The properties of alumina ceramics make them one of the most widely used ceramics for structural, wear, and corrosive environments. Alumina ceramics are typically manufactured from bauxite and can be shaped using injection molding, die pressing, isostatic pressing, slip casting, diamond machining, and extrusion. Like aluminum nitride and other important engineering materials, alumina can be produced by dry press and sinter or by hot pressing using appropriate sintering aids. Alumina-based ceramics are one of the most studied and characterized advanced ceramic materials known today. Due to the important combination of properties, their behavior has been thoroughly researched. Alumina is characterized by high hardness, excellent resistance to corrosion, thermal stability, good dielectric properties (for converting from DC to GHz frequencies), low loss tangent, and stiffness. See the next section for more details on the properties of alumina ceramic materials.

Properties of Alumina Ceramics

1. Depending on the content of Al2O3 and additives used, there are different series of aluminum oxide mateials.

• Based on the Al2O3 content, alumina can be categorized as 75% alumina, 85% alumina, 95% alumina, 99% alumina, and so on.
• Based on the difference in crystal phase, there are mullite, corundum-mullite, and corundum;
• Based on the variety of additives used, there is the chromium corundum, titanium corundum, etc.

2. Alumina is an excellent electrical insulator that is resistant to extremely high currents, and its resistance to electricity increases with its purity. The more pure alumina is, the higher the resistance would be.
3. Alumina is also known to have a very high melting point and strong mechanical strength. However, its mechanical strength decreases when the temperature goes above degrees Celsius. Due to the vast difference in its coefficient of thermal expansion, its resistance to thermal shock is less effective when exposed to very high temperatures.
4. The excellent chemical stability of alumina is the major contributor to its high resistance to corrosion.
5. Alumina is also slightly soluble in strong acid (such as hot sulfuric acid and the hot HCl and HF also have some corrosive effect.) and alkaline solutions, but does not dissolve in water. Pure alumina can resist chemical corrosion, making pure alumina the main choice for engineering components in several industrial applications. Its resistance to corrosion by chemicals has been shown to be due to its low solubility in those chemicals.
6. The introduction of additives can enhance the physical and chemical properties of alumina. These additives, combined with different production processes, can help in the production of alumina ceramics of varying sizes and shapes.
7. Alumina ceramic materials have the lowest vapor and decomposition pressures.
8. As you already know, alumina ceramics are similar to aluminum nitride based on their good thermal conductivity and good electrical insulation properties.

Application of Alumina Ceramics

1. Because of their excellent chemical stability, alumina ceramics are used widely in acid-resistant pump impellers, pump bodies, acid-carrying pipe linings and valves.
2. Aluminum oxide ceramics are used in the manufacture of textile wear parts and knives. This is due to their extreme hardness and wear resistance.
3. Aluminum oxide is the most commonly used abrasive grain in the woodwork and metalwork industry. This is because it does a better job than silicon carbide on several materials, including bare wood, painted surfaces, and metal.
4. Alumina ceramic materials are used in making spark plugs, which are useful in a wide variety of engines.
5. Transparent alumina ceramics are used in making high-pressure sodium lamps and infrared detection window material.
6. With an alumina content higher than 95%, alumina ceramics can be used as excellent electrical insulators. They also have a low dielectric loss, with a wide range of applications in electronics and electrical appliances.
7. Transparent aluminum oxide shows good permeability to visible light and infrared rays.
8. Other essential applications of alumina ceramics can be seen in seal rings, medical prostheses, laser tubes, thermocouple tubes, electronic substrates, ballistic armor, electrical insulators, grinding media, and wear components.

Further Reading: What is the Transparent Ceramic Material

Conclusion

Alumina ceramics are composed of aluminum oxide. The high thermal conductivity, high resistance to heat, excellent electrical insulation property, and high resistance to chemical corrosion of aluminum oxide mateials are some of the factors why they are a choice material for many industrial processes. Thank you for reading our article and we hope it can help you to have a better understanding of alumina ceramics. For more information, please visit https://www.preciseceramic.com/.

CangChen Alumina foam ceramics is a kind of foam material made from high-purity alumina. The foam ceramics have the characteristics of uniform porosity, high-temperature resistance, heat shock resistance, wear resistance and chemical stability. Aluminium Ceramic Filter Plates are widely used in casting processing, water treatment, chemical industry, environmental protection and other industries. Is the ideal liquid aluminum filter; catalytic support, and good sound insulation, and thermal insulation material. Product shapes, sizes, and voids of PPI can be designed and manufactured on request.

Regular Size:

DimensionToleranceThicknessRake AngleTortuosityDiagonal Line 12"/305mm  ±3mm  50mm±1mm  17.5°＋1°  Max.4mm ＜1% of side length 15"/381mm  ±3mm  50mm±1mm  17.5°＋1°  Max.4mm ＜1% of side length 17"/432mm  ±3mm  50mm±1mm  17.5°＋1°  Max.4mm ＜1% of side length 20"/508mm  ±4mm  50mm±1mm  17.5°＋1°  Max.4mm ＜1% of side length 23"/584mm  ±4mm  50mm±1mm  17.5°＋1°  Max.4mm ＜1% of side length

*Remarks: There are no cracks and obvious defects on the surface, no slag, and sealing cotton around it, the thickness is 7mm-10mm.

Physical performance indicators:

ColorWhiteGasketsAsbestos---NormalFiber Paper---MediumExpanded Vermiculite---SuperiorPPI10/20/30/40/50/60(Customized)AL2O3 80%-90% SiO2＜10% MgO＞10%Porosity ≥85％ Proportion 0.3g/cm³-0.45g/cm³ Refractory temperature ≥℃ Bending strength ＞0.5Mpa Thermal shock resistance 750℃/5times SolubilityUnder the temperature of metal aluminum and aluminum alloy solution, the filter equipment will not chemically react with the solution and dissolve.CertificateISO:REACH & RoHS & MSDS 

CangChen is a leading manufacturer and factory specializing in the production of Aluminium Ceramic Filter Plates. With years of experience and expertise in the industry, we have established ourselves as a trusted supplier of high-quality filter plates that meet the diverse needs of our clients.

If you are looking for a reliable and reputable manufacturer and factory of Aluminium Ceramic Filter Plates, look no further than CangChen. Contact us today for more details about our products, specifications, and parameters. Our team is ready to assist you with any questions or concerns you may have and help you find the perfect solution for your filtration needs.

What can Alumina Ceramic Foam Filter Plates do?

● Alumina foam ceramic filter plate can effectively remove all kinds of inclusions with fineness up to micron level in aluminum liquid, making aluminum liquid into a steady laminar flow, which is conducive to filling. 

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Contact us to discuss your requirements of ceramic foam filters. Our experienced sales team can help you identify the options that best suit your needs.

● It has a unique mullite-corundum structure, good mechanical strength and chemical stability, and excellent resistance to aluminum liquid erosion performance.

● It can obtain a stable filtration effect by strict control of hole size and through hole rate.

● The ceramic foam filter plate is surrounded by a sealing ceramic fiber liner, which facilitates the seal of the filter plate in the filter box to ensure that there is no metal liquid side.

● A selection range of 10ppi coarse porosity to 40ppi very fine porosity.

The other applications of Alumina foam ceramic filter plate:

1. Copper alloy casting filtration, 

In the casting process, Non-ferrous metal melt (brass, bronze, zinc, tin) also will generate oxidation, non-metallic debris and a large number of waste products. It can greatly reduce the rate of scrap if use foam ceramic filter plate. 1.0 ~ 1.2mm mesh with cordierite material is the best choice for the filtration of copper alloy.

2. Catalyst carrier for vehicle exhaust purification processor,

The foam ceramics have been widely used as the carrier of automobile exhaust catalytic purifiers because of their large surface area, good thermal stability, wear resistance, resistance to poisoning and low density. 

The foam ceramic automobile exhaust catalytic purifier installed in the exhaust pipe of the gasoline car can make the harmful gas CO, HC, and NOx discharged from the gasoline car into CO2, H2O, and N2, and the conversion rate can reach more than 90%; Used in diesel vehicles, carbon particle purification rate in more than 50%. When the foam ceramic filter element is full of carbon particles, the catalytic oxidation method or electronic combustion method can be used to regenerate, and constantly eliminate the deposited carbon particles, to achieve the purpose of long-term use.

3. In special fields,

The other applications under high-temperature conditions, foam ceramics have excellent thermal radiation characteristics, which are used to enhance heat transfer and combustion technology in porous media with remarkable results. Foam ceramic can also be made into a photocatalyst carrier, coated with nano titanium dioxide on the foam ceramic carrier, excited by ultraviolet light, has strong photocatalytic oxidation and degradation characteristics, can catalyze the degradation of organic matter and microorganisms, to purify the air. Foam ceramics can also be made into chemical tower packing, gas distribution materials, and gas stove energy-saving combustion plates.