Wei, W.-C.J.W.-C.J.WeiWEN-CHENG J. WEI2020-05-122020-05-122012https://scholars.lib.ntu.edu.tw/handle/123456789/492305Two oxides, Y 2 O 3 and Nb 2 O 5 , were doped into Bi 2 O 3 -based electrolyte in a composition of (Bi 1-x-y ,Nb x ,Y y ) 2 O 3 , where (x+y)=0.12 to 0.2 and the x:y ratio 3:1 to 1:3. The delta-phase retention, the oxygen vacancy order-disorder transformation, the ionic and electric conductivity were investigated by various techniques. The long-term conductivity of the dense electrolytes was determined showing moderate degradation due to phase transformation possible triggered by surface evaporation of Bi-oxide. The best retention of the conductivity is about 60% after 300 hr test.conference paper10.4028/www.scientific.net/AMR.509.1112-s2.0-84860804320https://www.scopus.com/inward/record.uri?eid=2-s2.0-84860804320&doi=10.4028%2fwww.scientific.net%2fAMR.509.111&partnerID=40&md5=f8660a27ef5aea9b9cb056fa001af6d7