FAST ION CONDUCTION IN THE DEFECT PYROCHLORE SYSTEM KALXW2-XO6, KTIXW2-XO6 AND KTABXW2-XO6 Academic Article

abstract

• K+ ionic conductivity has been measured by the complex impedence method for the defect pyrochlore type compounds of the general formula K(By+xW6+2-x)O6, (x=1/(6-y)) where B=Al3+, Ti4+ and Ta5+. Thermogravimetric analysis showed the compounds to be hydrated at room temperature with from {reversed tilde}0.2 mole for the Al compound to {reversed tilde}1 mole of water for the Ta substituted phase. There is a correlation between the lattice parameter and amount of water present in the cavities. The ionic conductivity of 5.210-3 -1 cm-1 at 300C for KAl0.33W1.67O6 is found to be best among known KB2O6 type pyrochlores. High ionic conductivity has been explained on the basis of occupancy of K+ ions in the available sites and polarization of the B2X6 network. 1985.

authors

• Clearfield, Abraham

published proceedings

• SOLID STATE IONICS

author list (cited authors)

• SUBRAMANIAN, M. A., SUBRAMANIAN, R., & CLEARFIELD, A.

citation count

• 18

complete list of authors

• SUBRAMANIAN, MA||SUBRAMANIAN, R||CLEARFIELD, A

publication date

• February 1985

publisher

• Elsevier  Publisher

published in

• Solid State Ionics  Journal

Digital Object Identifier (DOI)

• 10.1016/0167-2738(85)90101-8

start page

• 15

end page

• 19

volume

• 15

issue

• 1

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2F0167-2738%2885%2990101-8