SrTiO3 SC-NB
Grade
SC-NB = nb-doped conductive single crystal
Choose when the substrate must also serve as a bottom electrode / back-contact for ferroelectric, memristor or photocatalysis devices.
Values for the SC-NB condition
Other SrTiO3 tempers and conditions
SrTiO3 is listed in 3 conditions; see the grade overview at SrTiO3.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SC-NBThis page 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 SC-NB?
SrTiO3 SC-NB is SrTiO3 in the SC-NB grade — choose when the substrate must also serve as a bottom electrode / back-contact for ferroelectric, memristor or photocatalysis devices. The elastic modulus is 267 GPa (38.7 Msi). SrTiO3 SC-NB 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). SC-100 is the default condition FabDigit quotes; SC-NB is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 92/100, better than 89% of ceramic grades
Limitations
- Low fracture toughness — 0.85 MPa·√m (0.774 ksi·√in), worse than 98% of ceramic grades
SrTiO3 SC-NB properties
Typical room-temperature values for SrTiO3 SC-NB; 16 are specific to this condition. Other listed values are SrTiO3 reference data and may not represent this condition. Bars are the position among ceramic grades.
Physical5
SrTiO3 SC-NB 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 SC-NB is rated for continuous service to 1,100°C (2,012 °F). It conducts heat at 9 W/m·K (5.2 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 SC-NB is an electrical insulator with a dielectric strength of 10 kV/mm (254 V/mil) and a resistivity of 5×10⁻⁴ Ω·m.
Chemical & Environmental2
Corrosion resistance is very good (76/100), better than 53% of ceramic grades.
Sustainability4
Producing a kilogram of SrTiO3 SC-NB 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 SC-NB's machinability is not recommended (8/100, better than 69% of ceramic grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with SrTiO3 SC-NB
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.
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.
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) | — |
SrTiO3 SC-NB — frequently asked
What is SrTiO3 SC-NB used for?
SrTiO3 SC-NB 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 SC-NB 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 SC-NB 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 SC-NB?
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 SC-NB 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 SC-NB?
SrTiO3 SC-NB is rated for continuous use to about 1,100°C (2,012 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.