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Microstructure and conductivity of alumina-fiber-doped YSZ membranes
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chen, Ming Wen, Ting-Lian Lu, Zhi-Yi |
| Copyright Year | 2000 |
| Abstract | Alumina-fiber-doped YSZ membranes were fabricated by tape casting and pressureless sintering. With a milling time of 4 h and a slurry viscosity of ≈ 600 mPa·s (at a shear rate of 350 s−1), the fibers could be dispersed homogeneously in the slurry with an average aspect ratio of ≈ 20. With 1.5 vol% Al2O3 fibers, the relative density of the alumina-fiber-doped YSZ membranes reached a maximum of 93%, and then decreased gradually with higher fiber addition. For the 6 vol% alumina-fiber-doped YSZ membranes, the density decreased by 7.1%, accounting to 85.1% of the theoretical value. However, the density of the 6 vol% Al2O3/YSZ composites (fabricated by tape lamination) was 93.4%, which has benefited from the isostatic pressing of green compacts at a pressure of 300 MPa. Obvious fiber pull-out was observed in the fracture section of the alumina-fiber-doped green tapes while not in the cross-section of the sintered membranes. With the addition of alumina fibers, the ionic conductivity of the sintered membranes decreased much more than the ROM (Rule of Mixtures) theoretical calculation, which may be attributed to impurities in fibers and pores accompanied with fiber addition. |
| Starting Page | 403 |
| Ending Page | 407 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/BF02374160 |
| Volume Number | 6 |
| Alternate Webpage(s) | https://page-one.springer.com/pdf/preview/10.1007/BF02374160 |
| Alternate Webpage(s) | https://doi.org/10.1007/BF02374160 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
