Structure and transport properties of zirconia crystals co-doped by scandia, ceria and yttria

Агарков, Д. А.; Борик, М. А.; Бредихин, С. И.; Бурмистров, И. Н.; Eliseeva, G.M.; Kolotygin, V.A.; Kulebyakin, A. V.; Курицына, И. Е.; Ломонова, Е. Е.; Milovich, F. O.; Мызина, В. А.; Ryabochkina, P. A.; Tabachkova, N. Yu.; Volkova, Тatyana V.

doi:10.1016/j.jmat.2019.02.004

Cited by 14 publications

(8 citation statements)

References 28 publications

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“…Методом направленной кристаллизации с использованием прямого высокочастотного нагрева диэлектриков в холодном контейнере [5,6]…”

Section: экспериментальная частьunclassified

“…Как было показано в работах [5,6,9], фазовый состав кристаллов серии ScCeSZ представлял собой смесь высокотемпературной кубической фазы с низкотемпературными тетрагональной или ромбоэдрической фазами (табл. 2).…”

Section: результаты и обсуждениеunclassified

“…Только кристаллы 8Sc1CeSZ были однофазными и имели структуру тетрагональной фазы. Однако из-за наличия двойниковой структуры [5,6,9], образующейся в процессе охлаждения кристаллов в результате фазового перехода кубической в тетрагональную фазу, они также интенсивно рассеивали свет.…”

Section: результаты и обсуждениеunclassified

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Теплопроводность монокристаллов твердых растворов на основе ZrO-=SUB=-2-=/SUB=-, солегированных оксидами скандия, церия и иттрия

Борик¹,

Кулебякин²,

Курицына³

et al. 2019

Физика Твердого Тела

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Section: экспериментальная частьunclassified

Section: результаты и обсуждениеunclassified

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Теплопроводность монокристаллов твердых растворов на основе ZrO-=SUB=-2-=/SUB=-, солегированных оксидами скандия, церия и иттрия

Борик¹,

Кулебякин²,

Курицына³

et al. 2019

Физика Твердого Тела

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“…Vacancies introduced by the oversized dopants are located as the nearest neighbors to the Zr atoms, leaving the eightfold coordination to dopant cations. Undersized dopants compete with Zr ions for oxygen vacancies in zirconia, resulting in six-fold oxygen coordination and a large disturbance to the surrounding next nearest neighbors [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Scandia-doped zirconia (ScSZ) is considered the most suitable material at intermediate temperatures because it has much higher ionic conductivity than yttria-doped zirconia [10]. However, four different phases can be observed below 600 • C for ScSZ systems depending on the concentration of Sc 2 O 3 , i.e., cubic-tetragonal (5-7 mol %), cubic (8-9 mol %), and rhombohedral (10-15 mol %) [7,11]. Transitions between the highly conductive cubic phase and tetragonal or rhombohedral phases cause an abrupt decrease in ionic conductivity and suspend the application of ScSZ for intermediate temperature solid oxide fuel cells (IT-SOFC) [7,12].…”

Section: Introductionmentioning

confidence: 99%

Structure and Conductivity Studies of Scandia and Alumina Doped Zirconia Thin Films

et al. 2019

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In this work, scandia-doped zirconia (ScSZ) and scandia–alumina co-doped zirconia (ScSZAl) thin films were prepared by electron beam vapor deposition. X-ray diffraction (XRD) results indicated a presence of ZrO2 cubic phase structure, yet Raman analysis revealed the existence of secondary tetragonal and rhombohedral phases. Thus, XRD measurements were supported by Raman spectroscopy in order to comprehensively analyze the structure of formed ScSZ and ScSZAl thin films. It was also found that Al dopant slows down the formation of the cubic phase. The impedance measurements affirmed the correlation of the amount of secondary phases with the conductivity results and nonlinear crystallite size dependence.

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Advanced modification of scandia‐stabilized zirconia electrolytes for solid oxide fuel cells application—A review

Zakaria

Kamarudin

2020

Intl J of Energy Research

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Solid oxide fuel cells (SOFCs) are recognized as an energy generation device with high power density and energy conversion efficiency, low noise, low greenhouse gas emissions, positive environmental effect, and high fuel consumption versatility. Nevertheless, the high operating temperature of SOFCs has restricted the development in various applications due to challenges in material compatibility and working process. To address these issues, scandiastabilized zirconia (ScSZ) electrolytes are commonly utilized to explore its potentials as a solid electrolyte toward lowering the operating temperature due to high conductivity properties at low-to-intermediate temperature conditions. Thus, this paper provides an advanced modification of ScSZ electrolytes in SOFCs toward lowering the operating temperature. This review presents the potential properties and the progress modification of ScSZ electrolyte including challenges, and advances, summary, and future perspectives in the low-tointermediate operating temperature of SOFCs. This review can serve as a first reference for identifying specific parameters and prospective studies to enhance the properties of ScSZ electrolytes for the application of SOFCs. Based on the literature review, there are no previous review works that have been published on the modification of ScSZ electrolytes.

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Structure and transport properties of zirconia crystals co-doped by scandia, ceria and yttria

Cited by 14 publications

References 28 publications

Теплопроводность монокристаллов твердых растворов на основе ZrO-=SUB=-2-=/SUB=-, солегированных оксидами скандия, церия и иттрия

Теплопроводность монокристаллов твердых растворов на основе ZrO-=SUB=-2-=/SUB=-, солегированных оксидами скандия, церия и иттрия

Structure and Conductivity Studies of Scandia and Alumina Doped Zirconia Thin Films

Advanced modification of scandia‐stabilized zirconia electrolytes for solid oxide fuel cells application—A review

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