Stable high conductivity oxide electrolyte
AssigneeUniversity of Maryland, College Park
InventorsEric D. Wachsman, Adam Jolley
Life of this patent
Estimating the term…
Abstract
The present invention relates to rhomboidal phase bismuth oxide that maintains electric conductivity of at least about 1×10−2 S/cm at temperature of about 500° C. for at least about 100 hours. In particular, the bismuth oxides of the invention have stable conductivity at a temperature range from about 500° C. to about 550° C.
Claims20
A doped rhombohedral bismuth oxide that is phase-stable in a temperature range from about 10° C. to about 550° C., wherein said doped rhombohedral bismuth oxide maintains electric conductivity of at least about 1×10−2 S/cm at a temperature of a bout 500° C. for at least about 100 hours, and wherein said rhombohedral bismuth oxide comprises at least two different dopants.
A method for producing a rhombohedral bismuth oxide electrolyte, wherein said rhombohedral bismuth oxide electrolyte maintains electric conductivity of at least about 1×10−2 S/cm at a temperature of about 500° C. for at least about 100 hours, said method comprising:
- admixing a solid bismuth oxide with a first dopant and a second dopant to produce a powder mixture;
- calcining said powder mixture ata temperature of at least 600° C. to produce a calcined mixture;
- and
- sintering said calcined mixture to produce said rhombohedral bismuth oxide electrolyte.
Dependencies are inferred from the claim text.