Radiation Effects on Electrical Conductivity of Proton Conducting Oxide Ceramics

Tsuchiya, B.; Moroño, Á.; Hodgson, E.R.; Shikama, T.

doi:10.1238/physica.topical.118a00018

Cited by 6 publications

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“…1 Introduction Rare earth doped perovskite-type oxide ceramics have been extensively used as an electrolyte for fuel cells because of their high protonic conductivity, and in the near future their use is anticipated in radiation environments such as fusion and fission reactors as well as space [1,2]. Recently, it has been proposed that the electrical conductivity at room temperature for ytterbium doped strontium cerium oxide materials (SrCe 0.95 Yb 0.05 O 3-δ ) is suppressed by about two orders of magnitude after irradiation by 1.8 MeV electrons at an ionizing dose rate of 10 Gy/s [2].…”

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confidence: 99%

“…Recently, it has been proposed that the electrical conductivity at room temperature for ytterbium doped strontium cerium oxide materials (SrCe 0.95 Yb 0.05 O 3-δ ) is suppressed by about two orders of magnitude after irradiation by 1.8 MeV electrons at an ionizing dose rate of 10 Gy/s [2]. Electrical properties for many insulating materials are greatly influenced by changes in the levels between the valence and conduction bands, due to point defects, aggregates, dislocation loops, or colloids produced by irradiation [2 -5].…”

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“…The samples were mounted in a chamber evacuated at a pressure of less than 5x10 -4 Pa, and irradiated normal to the surface by 1.8 MeV electrons from a Van de Graaff electron accelerator (Euratom/CIEMAT, Madrid) [2][3][4]6]. The projected range of the 1.8 MeV electrons into the insulating materials was about 3 mm and thus the electrons penetrated the sample completely.…”

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Optical absorption of Yb‐doped SrCeO ₃ by electron irradiation

Tsuchiya

Moroño²,

Hodgson³

et al. 2005

phys. stat. sol. (c)

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PACS 61.80.Fe, 78.20.Ci Radiation effects on the optical absorption of orthorhombic perovskite-type oxide (Yb-doped SrCeO 3 ) ceramics have been studied at room temperature using 1.8 MeV electrons at a dose rate of 300 Gy/s. The optical absorption in the wavelength range 460 to 800 nm is significantly reduced by annihilation of two absorption bands at approximately 585 and 695 nm as the electron irradiation dose increases up to 7.6 MGy. This is associated with Ce 4+ to Ce 3+ conversion. Under these irradiation conditions, segregation of SrO to the sample surface was also observed. Further irradiation up to 15 MGy reduced the optical density in the infrared wavelength range between 800-2800 nm due to dissociation of water on the sample surface, activated by radiation damage.

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Optical absorption of Yb‐doped SrCeO ₃ by electron irradiation

Tsuchiya

Moroño²,

Hodgson³

et al. 2005

phys. stat. sol. (c)

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“…Electrical and optical properties of insulating materials are dynamically modified by the electronic excitation processes [1][2][3][4][5][6][7]. It is an interesting phenomenon from viewpoints of fundamental studies of radiation effects in ceramics.…”

Section: Introductionmentioning

confidence: 99%

“…In the present study, the radiation changes of optical properties such as luminescence and optical absorption for orthorhombic perovskite-type oxide ceramics, ytterbium-doped strontium-cerium oxide (SrCe 0.95 Yb 0.05 O 3Àd ; where d is the oxygen deficiency per perovskite-type oxide unit cell produced by displacement of Ce 4+ with Yb 3+ ) [8], were investigated using a high energy and high [3][4][5][6][7].…”

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confidence: 99%

Electron-induced luminescence of SrCe0.95Yb0.05O3−

Tsuchiya

Moroño

Hodgson

et al. 2005

Journal of Luminescence

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Radiation Induced Phenomena on Electronic and Protonic Conductions of Compact Hydride-Electrolyte Fuel Cell

Tsuchiya

Nagata

Saito

et al.

NATO Security Through Science Series A: Chemistry and Biology

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Electrical and protonic properties of Ytterbium-doped perovskite-type strontium-cerium oxide ceramics (SrCe 0.95 Yb 0.05 O 3-) including hydrogen (H), implanted with 10 keV H 2 + ions into zirconium film deposited on the one side only of the specimen, were investigated under a fission reactor irradiation. It was found that the radiation induced conductivity (RIC) for the specimen with H at 0.5 kGy/s was higher by about two orders of magnitude than the base conductivity without radiation at 0 Gy/s, and higher than that without H. The RIC is attributed to the electronic excitation as well as enhanced diffusion of hydrogen due to ionizing irradiation. Also, the RIC with H greatly depended on the irradiation temperature and hardly change with the fast neutron fluence, while that without H reduced with increasing the fluence. The fluence dependence on the radiation enhanced diffusion of H shows that the radiation induced defects, produced by neutron collisions, and the radiolysis have no influence on the protonic conduction.

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Radiation Effects on Electrical Conductivity of Proton Conducting Oxide Ceramics

Cited by 6 publications

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Optical absorption of Yb‐doped SrCeO ₃ by electron irradiation

Optical absorption of Yb‐doped SrCeO ₃ by electron irradiation

Electron-induced luminescence of SrCe0.95Yb0.05O3−

Radiation Induced Phenomena on Electronic and Protonic Conductions of Compact Hydride-Electrolyte Fuel Cell

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Radiation Effects on Electrical Conductivity of Proton Conducting Oxide Ceramics

Cited by 6 publications

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Optical absorption of Yb‐doped SrCeO 3 by electron irradiation

Optical absorption of Yb‐doped SrCeO 3 by electron irradiation

Electron-induced luminescence of SrCe0.95Yb0.05O3−

Radiation Induced Phenomena on Electronic and Protonic Conductions of Compact Hydride-Electrolyte Fuel Cell

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Optical absorption of Yb‐doped SrCeO ₃ by electron irradiation

Optical absorption of Yb‐doped SrCeO ₃ by electron irradiation