Behavior of Ytterbium in Calcium and Strontium Zirconate Matrices

Bootharajan, M.; Rao, J. S. Brahmaji; Kumar, R.; Jayaraman, V.

doi:10.1149/2.0251701jss

Cited by 2 publications

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“…Further, in the high temperature region (above 600 • C), the conductivity of grain bulk does not change with humidity, while at lower temperatures, it increases with a rise of pH 2 O as can be seen in Figure 5. It is worth noting that the total conductivity of Sr x Zr 0.95 Yb 0.05 O 3-δ (x = 1.00) obtained in the present research is similar to that of the same composition measured in air and reported in [22]. The literature data are presented in Figure 5a for comparison.…”

Section: Electrical Conductivity Of Srxzr095yb005o3-δsupporting

confidence: 89%

“…The solubility limit of ytterbium in SrZr 1-x Yb x O 3-δ was reported to be about 5 at. %, and the conductivity was shown to increase with an increase in Yb concentration, reaching a maximal value for the SrZr 0.95 Yb 0.05 O 3-δ composition [22]. However, to the best of our knowledge, the influence of Sr content on the conducting properties of this perovskite have not yet been studied.…”

Section: Introductionmentioning

confidence: 89%

“…Arrhenius plots of the total and bulk conductivities of SrxZr0.95Yb0.05O3-δ in air with different pH2O values: (a) x = 1.00, (b) x = 0.94 and 0.98.Solid and open symbols denote total and bulk conductivity, respectively; circles, diamonds and squares correspond to pH2O = 0.04 kPa, 0.61 kPa and 3.2 kPa, respectively. A solid line represents the total conductivity of SrZr0.95Yb0.05O3-δ reported in[22].…”

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confidence: 99%

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Effect of Sr Deficiency on Electrical Conductivity of Yb-Doped Strontium Zirconate

et al. 2022

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The effect of Sr-deficiency on microstructure, phase composition and electrical conductivity of SrxZr0.95Yb0.05O3-δ (x = 0.94–1.00) was investigated via X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy and impedance spectroscopy. The samples were synthesized by a chemical solution method and sintered at 1600 °C. According to X-ray diffraction data, the samples with x = 0.96–1.00 were single-phase oxides possessing an orthorhombic perovskite-type structure; while zirconia-based minor phases arouse at x = 0.94, which was confirmed by the electron microscopy. Sr stoichiometry was shown to influence the electrical conductivity. The highest total and bulk conductivities, 6–10−4 Scm−1 and 3–10−3 Scm−1, respectively, at 600 °C in humid air (pH2O = 3.2 kPa), were observed for the x = 0.98 composition. In the temperature range of 300–600 °C, the conductivity of the samples with x = 0.96–1.00 increased with the increase in humidity, which indicates a significant contribution of protonic defects to the charge transport. Electrical conductivity of SrxZr0.95Yb0.05O3-δ was discussed in terms of the defect formation model and the secondary phases precipitation.

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Section: Electrical Conductivity Of Srxzr095yb005o3-δsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 89%

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