8Y-FSZ POROUS
Grade
POROUS = porous sintered 8YSZ
Use as SOFC anode/cathode scaffold, gas-permeable support or high-temperature insulation where strength is secondary.
Values for the POROUS condition
Other 8Y-FSZ tempers and conditions
8Y-FSZ is listed in 2 conditions; see the grade overview at 8Y-FSZ.
- POROUS
- SINT
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
POROUSThis page 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 |
What is 8Y-FSZ POROUS?
8Y-FSZ POROUS is 8Y-FSZ in the POROUS grade — use as SOFC anode/cathode scaffold, gas-permeable support or high-temperature insulation where strength is secondary. 8Y-FSZ POROUS has a tensile strength of 25 MPa (3.63 ksi), weaker than 85% of ceramic grades. Elongation at break is 0% and the elastic modulus is 55 GPa (7.98 Msi). 8Y-FSZ POROUS has a density of 3.7 g/cm³ (0.134 lb/in³), lighter than 63% of ceramic grades. It melts at 2,700°C (4,892 °F). SINT is the default condition FabDigit quotes; POROUS is available on request or by drawing note.
Advantages
- Easy to machine — 15/100, better than 81% of ceramic grades
- High service temperature — 1,500°C (2,732 °F), better than 80% of ceramic grades
Limitations
- Low fracture toughness — 0.8 MPa·√m (0.728 ksi·√in), worse than 99% of ceramic grades
- Poor heat conductor — 0.9 W/m·K (0.52 BTU/hr·ft·°F), worse than 98% of ceramic grades
- Low stiffness — 55 GPa (7.98 Msi), worse than 83% of ceramic grades
8Y-FSZ POROUS properties
Typical room-temperature values for 8Y-FSZ POROUS; 15 are specific to this condition. Other listed values are 8Y-FSZ reference data and may not represent this condition. Bars are the position among ceramic grades.
Physical4
8Y-FSZ POROUS has a density of 3.7 g/cm³ (0.134 lb/in³), lighter than 63% of ceramic grades. It melts at 2,700°C (4,892 °F).
Mechanical12
8Y-FSZ POROUS has a tensile strength of 25 MPa (3.63 ksi), weaker than 85% of ceramic grades. Elongation at break is 0% and the elastic modulus is 55 GPa (7.98 Msi).
Thermal5
8Y-FSZ POROUS is rated for continuous service to 1,500°C (2,732 °F). It conducts heat at 0.9 W/m·K (0.52 BTU/hr·ft·°F), worse than 98% of ceramic grades. Thermal expansion is 10.3 µm/m·K (5.72 µin/in·°F).
Electrical3
8Y-FSZ POROUS has an electrical resistivity of 2.5×10⁷ Ω·m.
Chemical & Environmental2
Corrosion resistance is excellent (85/100), better than 69% of ceramic grades.
Sustainability4
Producing a kilogram of 8Y-FSZ POROUS 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 POROUS's machinability is poor (15/100, better than 81% of ceramic grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 8Y-FSZ POROUS
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.
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.
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 | — |
8Y-FSZ POROUS — frequently asked
What is 8Y-FSZ POROUS used for?
8Y-FSZ POROUS 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 POROUS?
8Y-FSZ POROUS has a typical tensile strength of 25 MPa (3.63 ksi) — weaker than 85% of ceramic grades. Strength varies by condition: see the 2 listed tempers.
Is 8Y-FSZ POROUS easy to machine?
Not especially — machinability is rated poor (15/100, better than 81% 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 POROUS 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 POROUS?
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 POROUS 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 POROUS?
8Y-FSZ POROUS 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.