Ionic conductivity of fully stabilized ZrO2: MgO and blocking effects

✍ Scribed by Eliana N.S. Muccillo; M. Kleitz

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 531 KB
• Volume: 15
• Category: Article
• ISSN: 0955-2219
• DOI: 10.1016/0955-2219(95)91299-4

✦ Synopsis

Ionic conductivity measurements were performed by impedance spectroscopy on ZrO,MgO 13.7 mol%, in the 270-700°C temperature range. The diagrams show characteristic intragrain and grain boundary semicircles. Activation energies for the intragrain conductivity and the intergrain blocking efect are 126 and 141 kJ mol-', respectively. The estimated spectjic conductivity is 9.8 S m-t at 1000°C. The conductivity blocking eflect at the grain boundaries is very similar to that of yttria-stabilized zirconia.