Aluminium Titanate – Ideal for High Temperature Industrial Applications
Aluminium Titanate is an exceptional ceramic material designed to meet the rigorous demands of high temperature industrial environments. It excels at meeting those challenges thanks to its superior wettability with nonferrous metal sources, thermal stability and outstanding mechanical strength.
Produced through reactively sintering of alumina and titanium dioxide in specific proportions. Rutile and other refractory oxides like magnesium, iron and zirconium may be added into the final product to further enhance its properties.
High Thermal Conductivity
Sintered aluminum titanate’s excellent thermal conductivity ensures minimal temperature and chemical exposure, making it an excellent choice for industrial settings. Furthermore, its excellent resistance to decomposition reactions makes it suitable for decomposition reactor linings as well as low coefficient of expansion which makes it suitable for applications such as kiln linings and ceramic furnace linings.
Aluminium titanate ceramic offers exceptional non-wettability for molten metals and outstanding chemical resistance, as well as great mechanical strength and machinability. Due to its non-corrosive and abrasion resistance properties, aluminium titanate advanced ceramic is widely used as spacer rings on diesel particulate filters; foundry crucibles (nozzles riser tubes pouring spouts used in nonferrous metalworking and glass industries); lightweight kiln linings; as well as aluminum smelting processes.
American Elements’ aluminium titaniumate powder is produced by reacting alumina and titanium dioxide into a solid solution in stoichiometric proportions, then doped with MgO, SiO2 or ZrO2. When doped accordingly it can produce alumina-aluminum titanate composites with superior machinability and mechanical characteristics.
Excellent Thermal Shock Resistance
Aluminum titanate (Al2TiO5) is an innovative high temperature material boasting exceptional thermal shock resistance, corrosion protection and low coefficient of expansion – qualities which make it suitable for foundry technology and melting applications in foundries and metal mills.
Silcarb provides machinable ceramic aluminium titanate for use in aluminium foundry applications, including low pressure stalk tubes up to 1.75 meters long and furnace feeder pipes used to transport, dose, control and convey molten metals such as non-ferrous metals such as aluminium and magnesium. Their no-wettability facilitates transporting liquid aluminium alloys under extreme temperatures as well as alkali conditions and temperature fluctuations without degradation or thermal shock damage occurring over time.
Pure alumina-titanate is unstable between 750-1350 degC; however, adding mullite or celsian as well as pure alumina titanate to stabilize it at these extreme temperatures allows us to make alumina-rutile composites with XRD peaks that correspond to both phases – see figure 2. Additionally, adding rutile decreases activation energy for decomposition as well as improving sinterability and mechanical properties of alumina-titanate (alumina+rutile + pure titanate = Alumina + Titanate+Rutile).
Optimal Chemical Resistance
Aluminum Titanate is an ideal material for foundry and casting applications, providing no-wetting surface for liquid alloys of molten aluminum, total gas impermeability and low thermal expansion coefficient. Furthermore, this durable material resists corrosion as well as alkali environments – perfect for use in industrial equipment and processing systems.
Silcarb’s alumina-titanate powder can be sintered into dense ceramic components using isostatic press technology and kiln lining materials, producing highly durable ceramic components for applications including sprue bushing, riser tubes, auto pour ceramic ladles and auto pour ceramic ladles. Our isostatic press technology also offers effective protection from chemical degradation due to high temperature alkalis or metal melts.
Pure alumina-titanate ceramics can become unstable between 750 degC and 1350 degC due to thermal shock stress; however, adding mullite and celsian to pure alumina lowers its melting point to 1860 degC for greater control of its coefficient of thermal expansion. Pressureless sintered A/AT samples with different amounts (0-40wt%) of rutile addition demonstrated that mechanical strength increases with increasing amounts due to intimate contact between its grains and those in Alumina, reinforced by having equal shapes across their grain structures. XRD patterns of pressureless sintered A/AT samples showed similar increases in mechanical strength as more rutile is added – likely attributed to intimate contact between its grains and those in Alumina, further reinforced by having uniform grain structures throughout.
Low Density
Aluminium Titanate is an ultralight material, ideal for applications where weight reduction is key. This is due to the strong yet flexible atomic bonds that compose aluminium titanate and makes this material so lightweight.
Ceramic material exhibits exceptional thermal shock resistance, with components made from it able to withstand temperature variations of several hundred degrees without incurring damage due to its combination of low thermal expansion coefficient and certain porosities in its microstructure.
Silcarb offers sintered alumina-titanate products designed to meet foundry applications. Our state-of-the-art sintering furnaces use isostatic press to press these products, before sintering for optimal density, thermal and physical properties, dosing components in nonferrous metallurgy such as crucibles, launders, nozzles and riser tubes and pouring spouts as well as master molds for casting metal casting applications such as pouring spouts for nonferrous metal casting applications such as pouring spouts and spacing rings for casting metal casting applications.