Ion Transport in Ca(2+), Sr(2+), Ba(2+), and Pb(2+), Beta' Aluminas.
PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF MATERIALS SCIENCE AND ENGINEERING
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Single crystals of Ca2, Sr2, Ba2, and Pb2 beta alumina were prepared from sodium beta alumina by ion exchange. The ionic conductivities of Ca2, Sr2, and Ba2 beta alumina are comparable, about 2-4x10-2 ohm-cm-1 at 300 degrees C. Surprisingly, Pb2 beta alumina is much more conductive, 1.5x10-1 ohm-cm-1 at 300 degree C and 4.6x10-3 ohm-cm-1 at 40 degrees C. Its conductivity approaches that of sodium beta alumina at temperatures below 25 degrees C. The diffusion coefficient for Sr2 in beta alumina at 600 degrees C was estimated from radiotracer experiments. It is consistent with that expected from conductivity measurements.
- Particle Accelerators
- Nuclear Physics and Elementary Particle Physics