8Y-FSZ
8Y-FSZ is a cubic zirconia fully stabilized with about 8 mol% yttria, specified for high oxygen-ion conductivity rather than mechanical toughness.
Reference datasheet — 8Y-FSZ 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 SINT condition
8Y-FSZ tempers and conditions
8Y-FSZ is supplied in 2 conditions, soft to hard. SINT is the default FabDigit quotes; the values on this page are for it.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Porous sintered 8YSZ | Use as SOFC anode/cathode scaffold, gas-permeable support or high-temperature insulation where strength is secondary. | 25 | 0 | 400 HV | 0.9 W/m·K | |
SINTDefault Sintered | Standard dense sintered 8YSZ for oxygen sensors, oxygen pumps, crucibles and thick electrolyte discs. | 1,300 HV | 2 W/m·K |
Supply forms, finishes and certifications
Ways 8Y-FSZ is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
TAPE | Tape-cast thin electrolyte sheet | Printing process |
APS | Atmospheric plasma-sprayed coating | Surface finish |
What is 8Y-FSZ?
8Y-FSZ is a cubic zirconia fully stabilized with about 8 mol% yttria, specified for high oxygen-ion conductivity rather than mechanical toughness. It is used as SOFC electrolyte sheets, oxygen sensor elements and plasma-spray powder for thermal barrier coatings, and is available sintered, tape cast, APS-grade and porous. Density is 5.95 g/cm³, modulus 200 GPa, thermal conductivity 2.2 W/m·K and maximum service temperature 1500 °C. The cubic phase has no transformation toughening, so thin electrolyte sheets are fragile; use 3Y-TZP for structural duty. 8Y-FSZ has a density of 5.95 g/cm³ (0.215 lb/in³), heavier than 64% of ceramic grades. It melts at 2,700°C (4,892 °F). 8Y-FSZ has a tensile strength of 150 MPa (21.8 ksi), stronger than 55% of ceramic grades. Elongation at break is 0% and the elastic modulus is 200 GPa (29 Msi).
What is 8Y-FSZ used for?
- SOFC electrolytes
- oxygen sensor elements
- thermal barrier coatings
Advantages
- Good corrosion resistance — 92/100, better than 88% of ceramic grades
- High service temperature — 1,500°C (2,732 °F), better than 80% of ceramic grades
Limitations
- Poor heat conductor — 2.2 W/m·K (1.27 BTU/hr·ft·°F), worse than 87% of ceramic grades
8Y-FSZ properties
Typical room-temperature values for 8Y-FSZ-SINT; bars are the position among ceramic grades.
Physical4
8Y-FSZ has a density of 5.95 g/cm³ (0.215 lb/in³), heavier than 64% of ceramic grades. It melts at 2,700°C (4,892 °F).
Mechanical12
8Y-FSZ has a tensile strength of 150 MPa (21.8 ksi), stronger than 55% of ceramic grades. Elongation at break is 0% and the elastic modulus is 200 GPa (29 Msi).
Thermal5
8Y-FSZ is rated for continuous service to 1,500°C (2,732 °F). It conducts heat at 2.2 W/m·K (1.27 BTU/hr·ft·°F), worse than 87% of ceramic grades. Thermal expansion is 10.3 µm/m·K (5.72 µin/in·°F).
Electrical3
8Y-FSZ has an electrical resistivity of 1×10⁷ Ω·m.
Chemical & Environmental2
Corrosion resistance is excellent (92/100), better than 88% of ceramic grades.
Sustainability4
Producing a kilogram of 8Y-FSZ takes about 115 MJ of energy and emits 8 kg of CO₂ — less than 51% of ceramic grades. Typical recycled content is 0%.
Manufacturability3
8Y-FSZ's machinability is not recommended (5/100, worse than 59% 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. 8Y-FSZ is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 8Y-FSZ
Is 8Y-FSZ easy to machine?
Green/bisque machining is the economic route; after sintering only diamond grinding, lapping and laser/ultrasonic cutting work, and thin electrolyte sheets chip easily at edges.
Can 8Y-FSZ be welded?
Not weldable; join by active-metal brazing (Ag-Cu-Ti), glass-ceramic seals (typical for SOFC stacks) or ceramic adhesives.
Can 8Y-FSZ be formed, bent or molded?
Uniaxial/isostatic pressing, tape casting, slip casting, extrusion or screen printing of spray-dried granulate; sinter 1350–1600 °C in air with ~20 % linear shrinkage.
8Y-FSZ 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 |
|---|---|---|
| Y2O3≈8 mol% Y2O3, fully stabilizes the cubic fluorite phase | 13 – 14.5 | 13.7 |
| Al2O3optional sintering aid / grain-boundary scavenger | 0 – 0.5 | 0.25 |
| SiO2impurity; degrades grain-boundary conductivity | ≤ 0.02 | |
| Fe2O3impurity | ≤ 0.01 | |
| Na2Oimpurity | ≤ 0.04 | |
| ZrO2 (+HfO2)HfO2 present as natural companion, typically 1.5–2.5 % | balance |
What surface finishes work on 8Y-FSZ?
Lap and polish with diamond to sub-µm Ra for sensor sealing faces; electrode layers (Pt, Ni-YSZ, LSM) applied by screen printing or sputtering and fired on.
How much does 8Y-FSZ cost?
8Y-FSZ is a high-cost ceramic ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
8Y-FSZ — frequently asked
What is 8Y-FSZ used for?
8Y-FSZ is typically used for SOFC electrolytes, oxygen sensor elements and thermal barrier coatings. In short: oxygen-ion conducting zirconia; 1500 °C service capability; low toughness, cubic phase.
What is the tensile strength of 8Y-FSZ?
8Y-FSZ has a typical tensile strength of 150 MPa (21.8 ksi) — stronger than 55% of ceramic grades. Strength varies by condition: see the 2 listed tempers.
Is 8Y-FSZ easy to machine?
Not especially — machinability is rated not recommended (5/100, worse than 59% of ceramic grades). Green/bisque machining is the economic route; after sintering only diamond grinding, lapping and laser/ultrasonic cutting work, and thin electrolyte sheets chip easily at edges.
Can 8Y-FSZ be welded?
Not weldable; join by active-metal brazing (Ag-Cu-Ti), glass-ceramic seals (typical for SOFC stacks) or ceramic adhesives.
What surface finishes work on 8Y-FSZ?
Lap and polish with diamond to sub-µm Ra for sensor sealing faces; electrode layers (Pt, Ni-YSZ, LSM) applied by screen printing or sputtering and fired on.
Can 8Y-FSZ be formed, bent or molded?
Uniaxial/isostatic pressing, tape casting, slip casting, extrusion or screen printing of spray-dried granulate; sinter 1350–1600 °C in air with ~20 % linear shrinkage.
What is the maximum service temperature of 8Y-FSZ?
8Y-FSZ is rated for continuous use to about 1,500°C (2,732 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 8Y-FSZ cost?
8Y-FSZ is a high-cost ceramic ($$$$), 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
- TZ-8Y / TZ-8YS zirconia powder data — Tosoh Corporation (2022)
- ASM Engineered Materials Handbook Vol. 4: Ceramics and Glasses — ASM International (1991)
- Fully stabilized zirconia (FSZ) technical ceramics data — CoorsTek / Kyocera (2023)
- GB/T 21650 / GB/T 23806 ceramic property test methods — SAC (2009)
- SOFC electrolyte and TBC property compilations — NIST / open literature (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.