Transport properties of Bi2CuO4–Bi2O3 ceramic composites

Лысков, Н. В.; Metlin, Yu. G.; Белоусов, В. В.; Tret’yakov, Yu. D.

doi:10.1016/j.ssi.2003.10.008

Cited by 21 publications

(6 citation statements)

References 7 publications

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“…6 shows an electrical conductivity of Bi 2 CuO 4 /Bi 2 O 3 composites measured versus temperature and average grain size in air. 92,93 The curves feature jumps at 730 • C and 770 • C. The first jump is induced by the polymorphic transition of ␣-Bi 2 O 3 to ␦-Bi 2 O 3 . 94 The second is induced by the grain boundary wetting transition and a liquid channel grain boundary structure formation.…”

Section: Influence Of Grain Boundary Wetting Transition On Transport mentioning

confidence: 99%

Surface ionics: A brief review

Белоусов

2007

Journal of the European Ceramic Society

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Section: Influence Of Grain Boundary Wetting Transition On Transport mentioning

confidence: 99%

Surface ionics: A brief review

Белоусов

2007

Journal of the European Ceramic Society

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“…Neither was the problem of the development of microcomposite materials based on superconducting cuprates 114 discussed in proper detail. In addition to the functional inorganic materials considered in the present review, the subjects under study at the Division of Inorganic Chemistry of the Department of Chemistry and the Department of Materials Science of MSU include: Ð inorganic structures as materials for gas sensors; { Ð barrier materials based on BaMO 3 (M = Zr, Hf, Th, Ce, Ti); 116,117 Ð luminescent nanocomposites based on A IV B VI ; 118,119 Ð low-dimensional structures and superlattices; 120,121 Ð new generations of semiconductors and semiconductor heterostructures; 122 ± 124 Ð oxygen-conducting membranes and solid electrolytes; 125,126 Ð materials for lithium current sources; 127 ± 129 Ð magnetic nanocomposites based on glassy matrices; 130 Ð photonic crystals; 131 Ð ceramic pigments based on hydroxyapatites containing copper ions in an unusual linear coordination. 132 It should be mentioned in conclusion that other promising trends of research related primarily to the development of molecular electronics, 133 spintronics 134 and biocrystal systems 135 require active participation of inorganic chemists.…”

Section: Discussionmentioning

confidence: 99%

Development of inorganic chemistry as a fundamental for the design of new generations of functional materials

Tretyakov¹

2004

Russ. Chem. Rev.

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The lines of research in the field of inorganic chemistry The lines of research in the field of inorganic chemistry that are closely related to the design of novel functional materials that are closely related to the design of novel functional materials are analysed. Special attention is given to areas of inorganic are analysed. Special attention is given to areas of inorganic materials chemistry that have been developed most intensely at materials chemistry that have been developed most intensely at over the past decade. The bibliography Moscow State University over the past decade. The bibliography includes 135 references. includes 135 references.

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“…Electrochemical properties of the Bi 2 CuO 4 −(5−20 wt % Bi 2 O 3 ) LGBS were studied. 36 The results showed that these LGBSs are mixed conductors where the electron transfer occurs in both solid Bi 2 CuO 4 and intergranular liquid channels, but the oxygen ion transfer occurs only in intergranular liquid channels. An increase in the volume fraction of liquid leads to the enhancement of ionic conductivity of the LGBS (Figure 4).…”

Section: Catastrophic Oxidation Of Coppermentioning

confidence: 93%

“… Therefore, the copper catastrophic oxidation is caused by the formation of LGBS in the oxide scale. Electrochemical properties of the Bi 2 CuO 4 –(5–20 wt % Bi 2 O 3 ) LGBS were studied . The results showed that these LGBSs are mixed conductors where the electron transfer occurs in both solid Bi 2 CuO 4 and intergranular liquid channels, but the oxygen ion transfer occurs only in intergranular liquid channels.…”

Section: Catastrophic Oxidation Of Coppermentioning

confidence: 99%

Next-Generation Electrochemical Energy Materials for Intermediate Temperature Molten Oxide Fuel Cells and Ion Transport Molten Oxide Membranes

Белоусов

2017

Acc. Chem. Res.

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High temperature electrochemical devices such as solid oxide fuel cells (SOFCs) and oxygen separators based on ceramic materials are used for efficient energy conversion. These devices generally operate in the temperature range of 800-1000 °C. The high operating temperatures lead to accelerated degradation of the SOFC and oxygen separator materials. To solve this problem, the operating temperatures of these electrochemical devices must be lowered. However, lowering the temperature is accompanied by decreasing the ionic conductivity of fuel cell electrolyte and oxygen separator membrane. Therefore, there is a need to search for alternative electrolyte and membrane materials that have high ionic conductivity at lower temperatures. A great many opportunities exist for molten oxides as electrochemical energy materials. Because of their unique electrochemical properties, the molten oxide innovations can offer significant benefits for improving energy efficiency. In particular, the newly developed electrochemical molten oxide materials show high ionic conductivities at intermediate temperatures (600-800 °C) and could be used in molten oxide fuel cells (MOFCs) and molten oxide membranes (MOMs). The molten oxide materials containing both solid grains and liquid channels at the grain boundaries have advantages compared to the ceramic materials. For example, the molten oxide materials are ductile, which solves a problem of thermal incompatibility (difference in coefficient of thermal expansion, CTE). Besides, the outstanding oxygen selectivity of MOM materials allows us to separate ultrahigh purity oxygen from air. For their part, the MOFC electrolytes show the highest ionic conductivity at intermediate temperatures. To evaluate the potential of molten oxide materials for technological applications, the relationship between the microstructure of these materials and their transport and mechanical properties must be revealed. This Account summarizes the latest results on oxygen ion transport in potential MOM materials and MOFC electrolytes. In addition, we consider the rapid oxygen transport in a molten oxide scale formed on a metal surface during catastrophic oxidation and show that the same transport could be used beneficially in MOMs and MOFCs. A polymer model explaining the oxygen transport in molten oxides is also considered. Understanding the oxygen transport mechanisms in oxide melts is important for the development of new generation energy materials, which will contribute to more efficient operation of electrochemical devices at intermediate temperatures. Here we highlight the progress made in developing this understanding. We also show the latest advances made in search of alternative molten oxide materials having high mixed ion electronic and ionic conductivities for use in MOMs and MOFCs, respectively. Prospects for further research are presented.

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Transport properties of Bi2CuO4–Bi2O3 ceramic composites

Cited by 21 publications

References 7 publications

Surface ionics: A brief review

Surface ionics: A brief review

Development of inorganic chemistry as a fundamental for the design of new generations of functional materials

Next-Generation Electrochemical Energy Materials for Intermediate Temperature Molten Oxide Fuel Cells and Ion Transport Molten Oxide Membranes

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