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The e ect of B2O3 addition on the electrical conductivity of 8 mol% yttria-stabilized cubic zirconia (8YSZ) was investigated by analyzing the impedance spectra of 0 10 wt.% B2O3-doped 8YSZ powders prepared via a colloidal process. The doped powders were then pelletized under a pressure of 200 MPa, and then sintered at 1400 ◦C for 10 h. Measurements of the electrical conductivity of the sintered specimens within a frequency range of 100 mHz 13 MHz, and temperature range of 300 800 ◦C, revealed an increase in conductivity with increasing temperature. Furthermore, the grain interior, grain boundary and total conductivity of 8YSZ were found to be enhanced by the addition of 1 wt.% B2O3. This is attributed to the lattice distortion created by the addition of B cations to the 8YSZ lattice, which leads to an increase in the concentration of oxygen vacancies, thus ultimately resulting in an enhanced electrical conductivity.

Electrical Conductivity of Boron Oxide-Doped Yttria-Stabilized Cubic Zirconia (8YSZ)