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U.S. Department of Energy
Office of Scientific and Technical Information

ac conductivity of polycrystalline CA-. beta. ''-alumina

Technical Report ·
OSTI ID:5311191

Polycrystalline Ca-..beta..''-alumina was prepared from Na-..beta..''-alumina by molten salt exchange in Ca(NO/sub 3/)/sub 2/-CaCl/sub 2/ and in CaCl/sub 2/. CaO.6Al/sub 2/O/sub 3/ did not form during the exchange processes. CaCl/sub 2/ attacks the polycrystalline ..beta..''-alumina. ac conductivity data on the polycrystalline material were fitted to an equivalent circuit using a nonlinear least-squared-error fitting program, from which the Ca ion conductivity was extracted. The bulk Ca ion conductivity is 3 x 10/sup -4/ (ohm.cm)/sup -1/ at 300/sup 0/C. Intergranular resistance is thought to dominate the overall Ca ion resistance.

Research Organization:
Sandia National Labs., Albuquerque, NM (USA)
DOE Contract Number:
AC04-76DP00789
OSTI ID:
5311191
Report Number(s):
SAND-83-2655C; CONF-831086-11; ON: DE84005529
Country of Publication:
United States
Language:
English