Electrical and electromechanical properties of stoichiometric lithium niobate at high-temperatures

► Electrical and electromechanical determination of lithium niobate ► The electrical conductivity is dominated by electrons at pO2 < 10− 5 bar. ► The ionic conductivity shows a linear dependence of σi = 6.3 ⋅ 10− 4 + 0.022[VLi]. ► Lithium ion diffusion via lithium vacancies at 0.2 bar is verified. ► Oxygen vacancies formation of [V
-
- o]/[LiNbO3] < 5.2 ⋅ 10− 5 under reducing atmosphere.