Ageing behaviour of zirconia stabilised by yttria and manganese oxide
Source abstract
Abstract
The effect of Mn on the structure, lattice parameter and conductivity has been investigated for near-cubic YSZ with an yttrium content slightly under 8 mol% Y2O3. The structure and chemistry of the material were studied both as sintered, and also after prolonged heat treatments at 850 and 1000°C, using x-ray diffraction, electron microscopy, impedance spectroscopy and d.c. conductivity measurements. In the latter case, the measurements were made in-situ during ageing. At 1000°C and for Mn additions above about 2 mol% YSZ is found to be stabilised as the cubic structure, and thereby the conductivity is also stabilised. However, at all temperatures studied, the presence of Mn considerably reduces the ionic conductivity of YSZ.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Electronic and Structural Properties of Oxides · Thermal Expansion and Ionic Conductivity
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References (22)
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