Relaxation Peaks Produced by Defect Complexes in Cerium Dioxide Doped with Trivalent Cations
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چکیده
Ceriuii dioxide doped with y 3 + ions, which is of interest for its ionic conductivity, is here studied by anelastic ~~~ethods. The internal friction peaks observed are analyzed intc peals A , B, C (with Hr = 0.64, 0.71 and 0.78 eV, respectively). Peak A, present at low y3+ concentrations is established to be due to a W pair (V = oxygen-ion vacancy), which is a charged defect conpensated by an isolate2 Y. Peal: B is believed to be due to a Y2V complex with the V-Y pair in the (1,0,0) configuxation. For this defect, only relaxations involving the V notion are observable, giving an example of the "frozen-free split" phenomenon.
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تاریخ انتشار 2017