Effect of ceria and ytterbia on the structure and properties of solid electrolytes based on scandia-stabilized zirconia

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-05-02 DOI:10.1016/j.mseb.2025.118385

D.A. Agarkov , M.A. Borik , A.S. Chislov , D.S. Katrich , A.V. Kulebyakin , B.E. Komarov , I.E. Kuritsyna , E.E. Lomonova , F.O. Milovich , V.A. Myzina , N.Y. Tabachkova , D.M. Zakharov

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Abstract

Crystals of ceria and ytterbia doped scandia-stabilized zirconia (ZrO₂)_1-_x-y-z(Sc₂O₃)_x (Yb₂O₃)_y(CeO₂)_z (x = 0.09;0.095, y = 0–0.02; z = 0;0.005) were grown using method of directional melt crystallization. Structure and phase composition of the crystals were studied using XRD and Raman spectroscopy, depending on their chemical composition and annealing at 1000 °C for 400 h. The conductivity was measured using impedance spectroscopy over the temperature range of 400–900 °C. At a Yb₂O₃ content of ≥ 1 mol.%, the crystals were single-phase and had a cubic fluorite structure. The conductivity of these crystals decreased slightly as the concentration of Yb₂O₃ increased to 2 mol.%. The addition of ceria to single-phase crystals, as well as prolonged annealing, did not have a noticeable effect on their structure or transport properties. The most significant changes in the structure and transport properties caused by the addition of ceria and annealing were observed in the two-phase crystals formed with a Yb₂O₃ concentration of less than 1 mol.%.

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氧化铈和氧化钇对氧化锆固体电解质结构和性能的影响

铈和镱掺杂钪稳定氧化锆（ZrO2）1-x-y-z(Sc2O3)x (Yb2O3)y(CeO2)z晶体(x = 0.09;0.095, y = 0-0.02；Z = 0;0.005)，采用定向熔融结晶法生长。利用XRD和拉曼光谱研究了晶体的结构和相组成，这取决于它们的化学成分和在1000°C下退火400 h。在400 - 900°C的温度范围内，使用阻抗谱测量了电导率。当Yb2O3含量≥1mol .%时，晶体为单相，具有立方萤石结构。当Yb2O3的浓度增加到2mol .%时，这些晶体的电导率略有下降。在单相晶体中添加二氧化铈，以及延长退火时间，对其结构或输运性能没有明显影响。在Yb2O3浓度小于1mol .%时形成的两相晶体中，添加铈和退火对结构和输运性能的影响最为显著。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.