Al2TiO5
Al2TiO5 (aluminium titanate) is a reaction-sintered oxide ceramic formed from Al2O3 and TiO2, whose microcracked structure gives very low net thermal expansion and exceptional thermal-shock resistance.
Reference datasheet — Al2TiO5 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the AT-STD condition
Al2TiO5 tempers and conditions
Al2TiO5 is supplied in 4 conditions, soft to hard. AT-STD is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AT-STDDefault Stabilized reaction-sintered aluminium titanate | Default choice for aluminium-casting riser/feed tubes, launders and thermocouple sheaths where thermal shock and non-wetting matter more than strength. | 450 HV | 2 W/m·K | |||
Fine-grained high-density (hot-pressed / additive-controlled) aluminium… | Pick when higher strength and stiffness are needed and some loss of near-zero CTE from suppressed microcracking is acceptable. | 700 HV | 2 W/m·K | |||
Aluminium titanate / mullite composite | Choose for longer service life at 1000–1300 °C: mullite second phase raises strength and suppresses Al2TiO5 decomposition. | 2 W/m·K | ||||
Porous honeycomb / filter body | Extruded high-porosity honeycomb for diesel particulate filters and hot-gas/metal-melt filtration where regeneration thermal shock dominates. | 0.8 W/m·K |
What is Al2TiO5?
Al2TiO5 (aluminium titanate) is a reaction-sintered oxide ceramic formed from Al2O3 and TiO2, whose microcracked structure gives very low net thermal expansion and exceptional thermal-shock resistance. Engineers specify it for parts that see fast heating cycles and molten-metal contact — extruded honeycombs, riser tubes, nozzles and kiln furniture — with service to 1400 °C, density 3.2 g/cm³, thermal conductivity 1.8 W/m·K and a corrosion resistance score of 85. The trade-off is low strength, a low elastic modulus of 15 GPa and friable fired bodies (machinability 25) that will not accept threads or sharp internal corners. Where mechanical loading dominates, mullite or cordierite is the closer choice. Al2TiO5 has a density of 3.2 g/cm³ (0.116 lb/in³), lighter than 72% of ceramic grades. It melts at 1,860°C (3,380 °F). Al2TiO5 has a tensile strength of 15 MPa (2.18 ksi), weaker than 90% of ceramic grades. Elongation at break is 0% and the elastic modulus is 15 GPa (2.18 Msi).
What is Al2TiO5 used for?
- diesel particulate filters
- molten metal handling components
- thermal shock resistant parts
- kiln furniture
Advantages
- Easy to machine — 25/100, better than 84% of ceramic grades
- High service temperature — 1,400°C (2,552 °F), better than 77% of ceramic grades
Limitations
- Hard to polish — 25/100, worse than 97% of ceramic grades
- Poor heat conductor — 1.8 W/m·K (1.04 BTU/hr·ft·°F), worse than 89% of ceramic grades
- Low stiffness — 15 GPa (2.18 Msi), worse than 87% of ceramic grades
- Low fracture toughness — 1 MPa·√m (0.91 ksi·√in), worse than 84% of ceramic grades
Al2TiO5 properties
Typical room-temperature values for Al2TiO5-AT-STD; bars are the position among ceramic grades.
Physical3
Al2TiO5 has a density of 3.2 g/cm³ (0.116 lb/in³), lighter than 72% of ceramic grades. It melts at 1,860°C (3,380 °F).
Mechanical11
Al2TiO5 has a tensile strength of 15 MPa (2.18 ksi), weaker than 90% of ceramic grades. Elongation at break is 0% and the elastic modulus is 15 GPa (2.18 Msi).
Thermal5
Al2TiO5 is rated for continuous service to 1,400°C (2,552 °F). It conducts heat at 1.8 W/m·K (1.04 BTU/hr·ft·°F), worse than 89% of ceramic grades. Thermal expansion is 1 µm/m·K (0.556 µin/in·°F).
Electrical2
Al2TiO5 has an electrical resistivity of 1×10⁸ Ω·m.
Chemical & Environmental2
Corrosion resistance is excellent (85/100), better than 69% of ceramic grades.
Sustainability4
Producing a kilogram of Al2TiO5 takes about 90 MJ of energy and emits 7 kg of CO₂ — less than 62% of ceramic grades. Typical recycled content is 0%.
Manufacturability3
Al2TiO5's machinability is poor (25/100, better than 84% of ceramic grades).
Common Calculations4
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the ceramic family
Yield strength against density for every ceramic grade FabDigit runs. Al2TiO5 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Al2TiO5
Is Al2TiO5 easy to machine?
Green machining is strongly preferred; fired AT is soft but friable — use diamond grinding with light feed, avoid tapping/threading and sharp internal corners.
Can Al2TiO5 be welded?
Not weldable; join by ceramic cement, glass frit brazing or mechanical clamping with compliant gaskets — allow for near-zero CTE against metal fixtures.
Can Al2TiO5 be formed, bent or molded?
Shaped by slip casting, cold isostatic/dry pressing or extrusion (honeycomb), then reaction-sintered at 1400–1600 °C with MgO/SiO2 stabilizer additions.
Al2TiO5 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Al2O3stoichiometric Al2TiO5 = 56.1 % Al2O3 | 50 – 60 | 56.1 |
| TiO2stoichiometric balance; excess Al2O3 often used to stabilize | 38 – 46 | 43.9 |
| MgOdecomposition stabilizer (forms MgTi2O5 solid solution) | 0 – 4 | 1.5 |
| SiO2mullite-forming / grain-boundary stabilizer | 0 – 5 | 1.5 |
| ZrO2optional stabilizer / toughener | 0 – 5 | 0 |
| Fe2O3optional stabilizer (pseudobrookite solid solution) | 0 – 3 | 0 |
What surface finishes work on Al2TiO5?
Left as-fired for melt contact (non-wetting surface); can be glazed or impregnated to seal open porosity, but polishing gains little because of microcracking.
Equivalent designations
Standards and trade names that resolve to Al2TiO5 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Also called
- AT ceramic
How much does Al2TiO5 cost?
Al2TiO5 is a high-cost ceramic ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Al2TiO5 — frequently asked
What is Al2TiO5 used for?
Al2TiO5 is typically used for diesel particulate filters, molten metal handling components, thermal shock resistant parts and kiln furniture. In short: best thermal-shock oxide ceramic; near-zero net expansion; low strength, low modulus.
What is the tensile strength of Al2TiO5?
Al2TiO5 has a typical tensile strength of 15 MPa (2.18 ksi) — weaker than 90% of ceramic grades. Strength varies by condition: see the 4 listed tempers.
Is Al2TiO5 easy to machine?
Not especially — machinability is rated poor (25/100, better than 84% of ceramic grades). Green machining is strongly preferred; fired AT is soft but friable — use diamond grinding with light feed, avoid tapping/threading and sharp internal corners.
Can Al2TiO5 be welded?
Not weldable; join by ceramic cement, glass frit brazing or mechanical clamping with compliant gaskets — allow for near-zero CTE against metal fixtures.
What surface finishes work on Al2TiO5?
Left as-fired for melt contact (non-wetting surface); can be glazed or impregnated to seal open porosity, but polishing gains little because of microcracking.
Can Al2TiO5 be formed, bent or molded?
Shaped by slip casting, cold isostatic/dry pressing or extrusion (honeycomb), then reaction-sintered at 1400–1600 °C with MgO/SiO2 stabilizer additions.
What is the maximum service temperature of Al2TiO5?
Al2TiO5 is rated for continuous use to about 1,400°C (2,552 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does Al2TiO5 cost?
Al2TiO5 is a high-cost ceramic ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- Engineered Materials Handbook Vol. 4: Ceramics and Glasses — ASM International (1991)
- Phase Equilibria Diagrams — Al2O3–TiO2 system — American Ceramic Society / NIST (2014)
- Aluminium titanate (AT) components for non-ferrous casting — CeramTec / Kyocera / Ensinger technical ceramics (2023)
- DuraTrap AT aluminium titanate diesel particulate filters — Corning Incorporated (2020)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.