Aluminum Titanate Revolutionizing High Temperature Industrial Applications
Aluminum titanate offers the ideal combination of strength and low thermal expansion. Thanks to its superior thermal shock resistance, aluminum titanate can withstand sudden temperature changes without succumbing to costly equipment failure.
Reaction sintered aluminum titanate features excellent non-wettability when in contact with liquid metals, making it the ideal material choice for non-ferrous cast houses and foundries seeking non-wettable riser tubes and pouring spouts.
Superior Thermal Stability
Aluminum Titanate offers excellent resistance to corrosion and erosion when exposed to molten aluminum, chemically aggressive slags, and alkalis – making it a suitable material for foundry applications like casting and refractory linings. Furthermore, no-wetting occurs for molten metals during casting processes, making this material easily machined to meet precise dimensions. Lastly, its low thermal conductivity, electrical failure resistance and thermal shock resistance make Aluminum Titanate an invaluable component in high-stakes environments.
Rutile additives to A/AT improve sintering and scalability, but may destabilise tialite structure. Magnesium, titanium dioxide ferric oxide or zirconium additives may help stabilise this structure and enhance mechanical properties at higher temperatures.
Sintered A/AT composites containing 0, 20, or 40 weight percent rutile ore exhibit excellent chemical and mechanical properties, including evenly distributed microstructure with equal surfaces and smaller grains than their AT matrix counterpart. Furthermore, these samples exhibit long coarse-grained grains indicating partial grain growth of alumina that increases fracture toughness.
Excellent Corrosion Resistance
Aluminum Titanate boasts exceptional chemical resistance against molten metals and slags, making it an ideal material for high temperature industrial applications such as furnace linings. Furthermore, Aluminum Titanate boasts an ideal low coefficient of thermal expansion and superior dimensional stability allowing it to resist sudden temperature changes without damage occurring due to sudden shifts.
Pure aluminium titanate can become thermodynamically unstable at temperatures between 750-1280degC, decomposing into its constituent oxides during cooling. To address this, calcined aluminium titanate powder may be combined with other refractory oxide phases like mullite or celsian to produce industrial ceramics with lower melting temperatures and decreased thermal expansion rates.
Studies of sintered A/AT composites with different concentrations of rutile have demonstrated intimate diffusion of alumina with rutile in their crystalline structures. Addition of rutile has significantly increased density of the resultant matrix while improving sintering behavior and decreasing activation energy for decomposition, leading to significantly improved mechanical strength values for composites containing between 0 R and 40 wt% rutile-alumina.
Extreme Wear Resistance
Aluminum Titanate has the capacity to withstand extremely high temperatures without suffering extensive damage, making it suitable for applications in the automotive, aerospace, and energy sectors. Applications include spacer rings for diesel particulate filters; nozzles and riser tubes used in foundry work; as well as refractory insulation liners used on melting furnace linings.
This material’s abrasion resistance derives from its tightly bound structure and alumina-titania matrix, while MgO, SiO2 and ZrO2 additives stabilize its structure while inhibiting decomposition reactions during sintering – producing dense, strong wear-resistant ceramic that’s immune to corrosion, erosion and alkali attack.
Furthermore, its exceptional thermal shock resistance enables rapid heating and cooling cycles without cracking or fracturing, prolonging their lifespan as ceramics. XRD patterns of sintered A/AT composites with different levels of rutile content (0-40 weight percent) reveal that increasing rutile content increases AT peak intensity while simultaneously decreasing Alumina peak intensity; American Elements manufactures this material according to Mil Spec, ACS Reagent Grade Technical Food Pharmaceutical and USP certification requirements as applicable.
Exceptional Thermal Shock Resistance
Due to global industrialization and an emphasis on energy efficiency, demand for materials that can withstand high temperatures and harsh environments has skyrocketed. Aluminum titanate ceramic components are perfect for automotive, aerospace, and energy applications as they can endure rapid temperature changes without losing integrity or functionality.
Aluminum titanate ceramics possess many desirable qualities that make them suitable for foundry applications, including non-ferrous casting houses. Their thermal stability, low thermal expansion, and superior wetting characteristics make CUMI’s reaction sintered alumina-titanate material an ideal choice.
As such, it makes an ideal material for foundry crucibles, launders, nozzles and riser tubes used in handling nonferrous metallurgical metals in non-ferrous metallurgy industries. Furthermore, doping with MgO, SiO2 and ZrO2 helps stabilize structure while attenuating decomposition reactions; its doping creates durable alumina-rutile composites resistant to slag, alkalis corrosion.