Open AccessEffect of zirconia in the density and ionic conductivity properties of Bi4V1.8Cu0.1Zn0.1O10.7 compound
Author(s) -
AB Silva,
Jorge-E Rueda-P
Publication year - 2015
Publication title -
bistua
Language(s) - English
Resource type - Journals
eISSN - 2711-3027
pISSN - 0120-4211
DOI - 10.24054/01204211.v1.n1.2015.1665
Subject(s) - ionic conductivity , materials science , cubic zirconia , bismuth , vanadium , bismuth vanadate , conductivity , inorganic chemistry , fast ion conductor , ceramic , vanadate , ionic bonding , electrolyte , crystallite , phase (matter) , yttria stabilized zirconia , ion , chemistry , metallurgy , electrode , organic chemistry , photocatalysis , catalysis
Ceramics based bismuth vanadate are conductors of oxygen ions and they are used as solid electrolytes in pressure sensors and fuel cells. These materials operate at temperatures above 700 °C. At high temperatures, the bismuth-vanadium oxide (Bi4V2O11) has a g-phase with a large number of oxygen vacancies that favors the ionic conductivity. The g-phase of the Bi4V2O11 was stabilized at room temperature by partial substitution of vanadium (V5+) ions by cuprum (Cu2+) and zinc (Zn2+) ions to provide high ionic conductivity values between 100 and 400oC. Thus, polycrystalline samples of Bi4V1.8Cu0.1Zn0.1O10.7 were obtained after 4h sintering at 800 °C. Investigations were made about densification process and ionic conductivity related to the effect of addition of the yttria-stabilized zirconia (Zr0.88Y0.12O1.94).