Structure and conductivity characterization of new type ionic conductor stabilized bismuth oxide ternary systems

Yılmaz, Serdar; Kavici, Bekir; Celen, Cigdem; Yıldız, Esra; Gurbuz, Aynur

doi:10.1016/j.cjph.2017.11.010

Cited by 14 publications

(4 citation statements)

References 31 publications

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“…According to results obtained from this study, they achieved to stabilize cubic δ-phase at all temperatures and they found that the ion conductivity was 0.57 S.cm -1 at 700 °C, which was the highest ion conductivity among all binary systems studied in the literature. Similarly, Yılmaz et al's also studied double-doped system in which they used Dy and Yb as dopants and they found that the conductivity was quite close to Wachsman's results with 0.51 S/cm for 14Yb10DSB mixture at 800 °C, although they exceeded 12% total doping rate suggested by Wachsman et al for double-doped systems [20][21].…”

Section: Introductionmentioning

confidence: 53%

The Effect of the Multi-doping Strategy on Stabilization of the Cubic δ-phase in the Bi2O3-based Solid Electrolyte Systems in Terms of the SOFC Applications

Balcı

Matmon

Polat

2021

Preprint

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In this study, the effects of multi-doping strategy on phase stabilization and electrical conductivity for the doped Bi 2 O 3 system were investigated. All solid mixtures were created by solid state reactions according to a certain stoichiometric ratio in atmospheric conditions. The structural, electrical, thermal and surface characterizations of the created samples were performed by x-ray diffraction method (XRD), four point-probe technique (4-PPT), differential thermal analysis/thermo gravimetric analysis (DTA/TGA) and scanning electron microscope (SEM), respectively. From XRD results, it was seen that the fcc δ-phase could be stabilized by using only 1:1:1:2 or 2:2:2:1 dopant content ratio (in here, “1:” is corresponds to” 5%” mole). The other compounds prepared out of this ratios were mixed phase because of the containing both α-phase peaks and δ-phase peaks on their XRD pattern. When the all samples were compared in terms of electrical conductivity at 750 °C, it was observed that the fcc δ-phase stabilized samples exhibited higher conductivity than that of other compounds as expected. The highest electrical conductivity was for the sample, dopant content ratios of which are 1: 1: 1: 2, with 0.014 S.cm -1 at 750 °C and also it had the lowest activation energy (0.51 eV) among all samples. On the other hand, according to the thermal analysis results, it was concluded that phase transition occurred only on the DTA curve of the sample given with dopant content ratios 1:1:1:1 due to presence of endothermic peak on its DTA curve at 729°C during the heating process. Also, for this sample, it was clearly predicted from the electrical conductivity graphs depending on temperature that the phase transition occurred at just that temperature (729 °C) due to the sudden increase in conductivity by indicating phase transition from the α-phase to the cubic δ-phase. The SEM analysis pointed out that grain size decreased as total dopant ratio increased and also the grain boundary changed sharply with the increase in the total dopant ratio.

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Section: Introductionmentioning

confidence: 53%

The Effect of the Multi-doping Strategy on Stabilization of the Cubic δ-phase in the Bi2O3-based Solid Electrolyte Systems in Terms of the SOFC Applications

Balcı

Matmon

Polat

2021

Preprint

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“…49−52 Stabilization of δ-Bi 2 O 3 to room temperature can be achieved by doping, 53 in mind that incorporation of dopants into the crystal lattice of bismuth(III) influences the physical properties and, for example, reduces the oxygen ion conductivity by several orders of magnitude. 10,54−56 In the last decades, numerous reports have dealt with the stabilization of δ-Bi 2 O 3 using a variety of main-group elements and transition metals (B, 14 P, 57 Ti, 58,59 V, 31−34 Fe, 60 Y, 61,62 Nb, 62,63 Te, 64 Ta, 65 Ce, 66−68 Eu, 69 Tb, 70 Dy, 71,72 Er, 73−75 Tm, 76 Yb, 77,78 Lu, 79 and Th 80 ) and double-doping (Hf/Zr, 81 Te/V, 82 Y/Yb, 83 Er/Nb, 84 Er/Gd, 85 Ho/Gd, 86 Ho/Dy, 87 Dy/W, 88 Sm/Ce, 89 Sm/Yb, 90 La/Mo, 91 Pr/Mo, 92 Dy/Tm, 93 Gd/Lu, 94,95 Yb/Dy, 96,97 Eu, or Tb/Th 98 ).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, a plethora of synthetic approaches for δ-Bi 2 O 3 in the form of powders, − ,,,,− films, ,− nanosheets, and nanowires was developed. However, stabilization of pure δ-Bi 2 O 3 at room temperature is still a challenge; therefore, the application of the metastable modification is restricted to a low number of examples. − Stabilization of δ-Bi 2 O 3 to room temperature can be achieved by doping, but it must be kept in mind that incorporation of dopants into the crystal lattice of bismuth(III) influences the physical properties and, for example, reduces the oxygen ion conductivity by several orders of magnitude. ,− In the last decades, numerous reports have dealt with the stabilization of δ-Bi 2 O 3 using a variety of main-group elements and transition metals (B, P, Ti, , V, − Fe, Y, , Nb, , Te, Ta, Ce, − Eu, Tb, Dy, , Er, − Tm, Yb, , Lu, and Th) and double-doping (Hf/Zr, Te/V, Y/Yb, Er/Nb, Er/Gd, Ho/Gd, Ho/Dy, Dy/W, Sm/Ce, Sm/Yb, La/Mo, Pr/Mo, Dy/Tm, Gd/Lu, , Yb/Dy, , Eu, or Tb/Th…”

Section: Introductionmentioning

confidence: 99%

Polymorphism and Visible-Light-Driven Photocatalysis of Doped Bi₂O₃:M (M = S, Se, and Re)

et al. 2022

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δ-Bi 2 O 3 :M (M = S, Se, and Re) with an oxygendefective f luorite-type structure is obtained by a coprecipitation m e t h o d s t a r t i n g f r o m t h e b i s m u t h o x i d o c l u s t e r [Bi 38 O 45 (OMc) 24 (dmso) 9 ]•2dmso•7H 2 O (A) in the presence of additives such as Na 2 SO 4 , Na 2 SeO 4 , NH 4 ReO 4 , Na 2 SeO 3 •5H 2 O, and Na 2 SO 3 . The coprecipitation of the starting materials with aqueous NaOH results in the formation of alkaline reaction mixtures, and the cubic bismuth(III)-based oxides Bi 14 O 20 (SO 4 ) ( 1 c ) , B i 1 4 O 2 0 ( S e O 4 ) (2 c ) , B i 1 4 O 2 0 ( R e O 4 . 5 ) (3 c ) , Bi 12.25 O 16.625 (SeO 3 ) 1.75 (4c), and Bi 10.51 O 14.765 (SO 3 ) 0.49 (SO 4 ) 0.51 (5c) are obtained after microwave-assisted heating; formation of compound 5c is the result of partial oxidation of sulfur. The compounds 1c, 2c, 4c, and 5c absorb UV light only, whereas compound 3c absorbs in the visible-light region of the solar spectrum. Thermal treatment of the as-prepared metastable bismuth(III) oxide chalcogenates 1c and 2c at T = 600 °C provides a monotropic phase transition into their tetragonal polymorphs Bi 14 O 20 (SO 4 ) (1t) and Bi 14 O 20 (SeO 4 ) (2t), while compound 3c is transformed into the tetragonal modification of Bi 14 O 20 (ReO 4.5 ) (3t) after calcination at T = 700 °C. Compounds of the systems Bi 2 O 3 −SO x (x = 2 and 3) and Bi 2 O 3 −Re 2 O 7 are thermally stable up to T = 800 °C, whereas compounds of the system Bi 2 O 3 −SeO 3 completely lose SeO 3 . Thermal treatment of 4c and 5c in air results in the oxidation of the tetravalent to hexavalent sulfur and selenium, respectively, upon heating to T = 400−500 °C. The as-prepared cubic bismuth(III)-based oxides 1c−5c were studied with regard to the photocatalytic decomposition of rhodamine B under visible-light irradiation with compound 3c showing the highest turnover and efficiency.

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“…In fact, the lightning protection device is a lightning rod, which can lead the surrounding lightning and discharge in advance, and transmit the lightning current to the ground through its own grounding conductor, so as to avoid the protection object being directly struck by lightning. The installed lightning rod and conductor shall have good conductivity, and the grounding grid shall ensure the minimum impedance value [3].…”

Section: Brief Introduction Of Lightning Rodmentioning

confidence: 99%

Study on the Laying and Protection Range of High-Rise Building Lightning Rod

Ran¹

2020

IJIACE

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The lightning protection principle of high-risebuilding lightning rod is analyzed. The installation of lightning rod can be divided into independent lightning rod and frame lightning rod. This paper analyzes the protection range of lightning rod from four aspects: single lightning rod, two equal height lightning rods, two unequal height lightning rods and three or more lightning rods. In this paper, the installation and protection range of lightning rod in high-rise buildings are described in detail. It is hoped that it will play a positive role in today's lightning protection production practice, for your reference.. 1

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Structure and conductivity characterization of new type ionic conductor stabilized bismuth oxide ternary systems

Cited by 14 publications

References 31 publications

The Effect of the Multi-doping Strategy on Stabilization of the Cubic δ-phase in the Bi2O3-based Solid Electrolyte Systems in Terms of the SOFC Applications

The Effect of the Multi-doping Strategy on Stabilization of the Cubic δ-phase in the Bi2O3-based Solid Electrolyte Systems in Terms of the SOFC Applications

Polymorphism and Visible-Light-Driven Photocatalysis of Doped Bi₂O₃:M (M = S, Se, and Re)

Study on the Laying and Protection Range of High-Rise Building Lightning Rod

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Structure and conductivity characterization of new type ionic conductor stabilized bismuth oxide ternary systems

Cited by 14 publications

References 31 publications

The Effect of the Multi-doping Strategy on Stabilization of the Cubic δ-phase in the Bi2O3-based Solid Electrolyte Systems in Terms of the SOFC Applications

The Effect of the Multi-doping Strategy on Stabilization of the Cubic δ-phase in the Bi2O3-based Solid Electrolyte Systems in Terms of the SOFC Applications

Polymorphism and Visible-Light-Driven Photocatalysis of Doped Bi2O3:M (M = S, Se, and Re)

Study on the Laying and Protection Range of High-Rise Building Lightning Rod

Contact Info

Product

Resources

About

Polymorphism and Visible-Light-Driven Photocatalysis of Doped Bi₂O₃:M (M = S, Se, and Re)