A New Oxide Ion Conductor Family: Bi7(P1-yVy)O13

✍ Scribed by J.P. Wignacourt; M. Drache; P. Conflant

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 190 KB
• Volume: 105
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1993.1192

✦ Synopsis

A new phase, (\mathrm{Bi}{7} \mathrm{PO}{13}), obtained at room temperature in the (\mathrm{Bi}{2} \mathrm{O}{3}-\mathrm{BiPO}{4}) system, has been identified as a superstructure of the (\delta \mathrm{Bi}{2} \mathrm{O}{3}) fcc form. Its conductivity level has been improved by a substitution of (\mathrm{V}) for (\mathrm{P}), in solid solution (\mathrm{Bi}{7}\left(\mathrm{P}{1-y} \mathrm{~V}{y}\right) \mathrm{O}{1,3}) with (0 \leq y \leq 0.5). Above (400^{\circ} \mathrm{C}) the conduction mechanism is due to the mobility of the (\mathrm{O}^{2-}) ions. The electrolyte (P{\mathrm{O}_{2}}) response time has been investigated vs time for successive thermal cycles. 1993 Academic Press. Inc.