ELECTROCHEMICAL CRYSTAL GROWTH AND CHARACTERIZATION OF THE IONIC CONDUCTOR K_l-xBa_xBiO_3. P. D. Han¹, S. R. Wilson², Y. G. Gao³, A. H.-J. Wang³, D. A. Payne¹, ¹Department of Materials Science and Engineering, Seitz Materials Research Laboratory, and Science and Technology Center for Superconductivity, ²Department of Chemistry, Materials Chemistry Laboratory, ³Department of Cell and Structural biology, University of Illinois at Urbana-Champaign, IL 61801 USA

K_1-xBa_xBiO₃ (x=0.05) single crystals up to 3x3x3mm³ in size were grown by a low-temperature electrochemical method from a KOH flux at 255deg.C. Data are reported for the morphology of the as-grown crystals as observed by optical and electron microscopy. Single crystal x-ray diffraction measurements were carried out on a Siemens CCD instrument. Electrical conductivity data were obtained from 5deg.K to 750deg.K, and thermogravimetric analysis was carried out on a TA 2950 instrument.

Information are reported for crystal growth parameters, single-crystal structure, electrical conductivity characteristics and thermogravimetry of single crystal

K_1-xBa_xBiO₃. The partial occupancy of potassium sites is consistent with ionic conductivity for the tunnel structure. The influence of Ba-doping on ionic conductivity is also discussed.