Peroxide as a mechanism to accommodate excess oxygen

摘要

1. The dominant defect in group II monoxides is the peroxide ion. Decomposition of BaO_2 to go to BaO with temperature agrees well with experiment. 2. Excess oxygen is accommodated by peroxide ions in CeO_2 and ThO_2 but not UO_2. 3. Transport is limited by bond breaking with O, intermediary. 4. Excess oxygen predicted to be accommodated in BaZrO_3 and SrZrO_3 by peroxide ions, for lower Fermi level values. 5. Activation energies again ~0.8 eV, similar to V_o mediated. 6. Raman on treated and un-treated zirconate powders predict formation of BaZrO_(3+x) and SrZrO_(3+x). 7. Further work: peroxide in AI_2O_3.