SrTiO3
SrTiO3 is a cubic perovskite oxide with high permittivity and paraelectric behaviour, supplied as (100)-oriented single crystal, Nb-doped conductive crystal and polycrystalline sintered bodies.
Reference datasheet — SrTiO3 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 SC-100 condition
SrTiO3 tempers and conditions
SrTiO3 is supplied in 3 conditions, soft to hard. SC-100 is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Nb-doped conductive single crystal | Choose when the substrate must also serve as a bottom electrode / back-contact for ferroelectric, memristor or photocatalysis devices. | 60 | 0 | 690 HV | 9 W/m·K | |
Polycrystalline sintered SrTiO3 ceramic | Choose for bulk capacitor/GBBL dielectric bodies, sputtering targets and low-cost high-permittivity ceramic parts. | 600 HV | 6 W/m·K | |||
SC-100Default Undoped single crystal, (100) epi-polished substrate | Choose for epitaxial growth of oxide/superconductor films and for high-index optical or dielectric single-crystal parts. | 690 HV | 12 W/m·K |
What is SrTiO3?
SrTiO3 is a cubic perovskite oxide with high permittivity and paraelectric behaviour, supplied as (100)-oriented single crystal, Nb-doped conductive crystal and polycrystalline sintered bodies. It is selected as a capacitor dielectric and as an epitaxial substrate for oxide electronics, with a density of 5.12 g/cm3, elastic modulus of 267 GPa and thermal conductivity of 11.5 W/m·K. Service is limited to about 1200 °C and to oxidising conditions, because reducing anneals blacken the crystal. Low fracture toughness and {100} cleavage make it chipping-prone during sawing and lapping, so tougher oxide substrates are used where handling losses matter. SrTiO3 has a density of 5.12 g/cm³ (0.185 lb/in³), heavier than 53% of ceramic grades. It melts at 2,080°C (3,776 °F). The elastic modulus is 267 GPa (38.7 Msi).
What is SrTiO3 used for?
- ceramic capacitor dielectrics
- thin-film epitaxy substrates
- varistors
Advantages
- Polishes to a fine finish — 92/100, better than 89% of ceramic grades
Limitations
- Low fracture toughness — 0.9 MPa·√m (0.819 ksi·√in), worse than 96% of ceramic grades
SrTiO3 properties
Typical room-temperature values for SrTiO3-SC-100; bars are the position among ceramic grades.
Physical5
SrTiO3 has a density of 5.12 g/cm³ (0.185 lb/in³), heavier than 53% of ceramic grades. It melts at 2,080°C (3,776 °F).
Mechanical10
The elastic modulus is 267 GPa (38.7 Msi).
Thermal5
SrTiO3 is rated for continuous service to 1,200°C (2,192 °F). It conducts heat at 11.5 W/m·K (6.64 BTU/hr·ft·°F), worse than 59% of ceramic grades. Thermal expansion is 9.4 µm/m·K (5.22 µin/in·°F).
Electrical5
SrTiO3 is an electrical insulator with a dielectric strength of 10 kV/mm (254 V/mil) and a resistivity of 1×10⁹ Ω·m.
Chemical & Environmental2
Corrosion resistance is very good (80/100), better than 56% of ceramic grades.
Sustainability4
Producing a kilogram of SrTiO3 takes about 90 MJ of energy and emits 6.5 kg of CO₂ — less than 62% of ceramic grades. Typical recycled content is 0%.
Manufacturability2
SrTiO3's machinability is not recommended (8/100, better than 69% of ceramic grades).
Common Calculations2
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. SrTiO3 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with SrTiO3
Is SrTiO3 easy to machine?
Green machining before firing for ceramics; fired or single-crystal material requires diamond sawing, grinding and lapping — chipping-prone due to low K_IC and {100} cleavage.
Can SrTiO3 be welded?
Not weldable; join by glass frit, active-metal brazing or diffusion bonding to matched-CTE metals (Kovar-class alloys are a rough CTE match).
Can SrTiO3 be formed, bent or molded?
Uniaxial/isostatic pressing, tape casting or slip casting of the powder, sintered 1350–1550 °C in air; single crystals grown by Verneuil or float-zone.
SrTiO3 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 |
|---|---|---|
| SrOstoichiometric SrTiO3 basis | 56 – 57 | 56.5 |
| Nb2O5only in Nb-doped conductive variant (0.05–0.7 wt% Nb) | 0 – 1 | 0 |
| TiO2Sr/Ti ratio typically 0.99–1.01 | ≥ 43 (balance) |
What surface finishes work on SrTiO3?
CMP to epi-ready <0.3 nm RMS; buffered-HF etch plus 950–1050 °C anneal gives TiO2-terminated stepped surfaces; avoid reducing anneals that blacken the crystal.
How much does SrTiO3 cost?
SrTiO3 is a high-cost ceramic ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
SrTiO3 — frequently asked
What is SrTiO3 used for?
SrTiO3 is typically used for ceramic capacitor dielectrics, thin-film epitaxy substrates and varistors. In short: high-permittivity perovskite oxide; standard oxide-epitaxy substrate; conductive Nb-doped option.
Is SrTiO3 easy to machine?
Not especially — machinability is rated not recommended (8/100, better than 69% of ceramic grades). Green machining before firing for ceramics; fired or single-crystal material requires diamond sawing, grinding and lapping — chipping-prone due to low K_IC and {100} cleavage.
Can SrTiO3 be welded?
Not weldable; join by glass frit, active-metal brazing or diffusion bonding to matched-CTE metals (Kovar-class alloys are a rough CTE match).
What surface finishes work on SrTiO3?
CMP to epi-ready <0.3 nm RMS; buffered-HF etch plus 950–1050 °C anneal gives TiO2-terminated stepped surfaces; avoid reducing anneals that blacken the crystal.
Can SrTiO3 be formed, bent or molded?
Uniaxial/isostatic pressing, tape casting or slip casting of the powder, sintered 1350–1550 °C in air; single crystals grown by Verneuil or float-zone.
What is the maximum service temperature of SrTiO3?
SrTiO3 is rated for continuous use to about 1,200°C (2,192 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does SrTiO3 cost?
SrTiO3 is a high-cost ceramic ($$$$), 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
- ASM Engineered Materials Handbook, Vol. 4 — Ceramics and Glasses — ASM International (1991)
- CRC Handbook of Chemistry and Physics (perovskite oxide property tables) — CRC Press (2022)
- SrTiO3 single-crystal substrate specification (epi-polished, undoped and Nb-doped) — MTI Corporation / Crystec / SurfaceNet (2023)
- Springer Materials — elastic and dielectric constants of SrTiO3 — Springer (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.