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- W1620291212 abstract "Al3+ stabilized tetragonal (t)-ZrO2 of nanoparticles is studied with X-ray photoelectron spectroscopy (XPS) as a function of the Al3+ concentration. The samples, with 2–15 mol% Al3+ additives, are prepared by co-hydrolysis of the two types of the metal cations in an amorphous precursor of oxyhydroxyl Zr1−2xAl2xO(OH)2−2x·αH2O gel. Substantially stabile t-ZrO2 occurs with the Al3+ additives on a reconstructive thermal decomposition of gel by heating at 500 °C in air. The Al3+ additive inhibits average t-ZrO2 crystallite size to be as small as 6–8 nm (9 nm otherwise in virgin t-ZrO2) depending on the Al3+ concentration. As analyzed with X-ray diffraction, no independent Al2O3 crystallizes, confirming formation of a perfect Al3+:ZrO2 solid solution under these conditions. Six distinct XPS bandgroups lie, in the 0–600 eV range of the binding energy, in excitations of 2p, 2s, 4p, 3d, or 3p core electrons in Al3+ and Zr4+ cations and in 1s excitation in O2− anions in Al3+:t-ZrO2 solid solution. Weak satellite 3d5/2 and 3d3/2 bands occur at lowered energies (8–10 eV) of the main bands in trace of part of the metal cations present in the lower Zrq+, q≤3, oxidation states." @default.
- W1620291212 created "2016-06-24" @default.
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- W1620291212 date "2004-01-01" @default.
- W1620291212 modified "2023-10-16" @default.
- W1620291212 title "X-ray photoelectron spectroscopic studies of Al3+ stabilized t-ZrO2 of nanoparticles" @default.
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- W1620291212 doi "https://doi.org/10.1016/s0169-4332(03)00883-3" @default.
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