High Oxygen Ion Conduction in Sintered Oxides of the $Bi_2O_3-Dy_2O_3$ System

M.J. Verkerk, A.J. Burggraaf

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Abstract

The phase diagram of the Bi2O3-Dy2O3 system was investigated. A monophasicfcc structure was stabilized for samples containing 28.5–50.0 mole percent (m/o) Dy2O3. Above and below this concentration range polyphasic regionsappear. The fcc phase showed high oxygen ion conduction. The ionictransference number is equal to one for specimens containing 28.5–40.0 m/o Dy2O3, whereas an electronic component is introduced at low temperaturesfor specimens containing 50.0 m/o Dy2O3. The conductivity of (Bi2O3)0.715(Dy2O3)0.285 is 0.71 Omega–1m–1 and 14.4 Omega–1m–1 at 773 and 973 K, respectively.Relations were found between the ionic radius, the conductivity, and the minimumconcentration of lanthanide necessary to stabilize the fcc phase. It is concludedthat the highest ionic conductivity will be found in the system Bi2O3-Er2O3or Bi2O3-Tm2O3. From a study of relations between the activation energy,log sigma0 and the composition it is concluded that two conductivity mechanismsplay a role.
Original languageUndefined
Pages (from-to)75-82
JournalJournal of the Electrochemical Society
Volume128
Issue number1
DOIs
Publication statusPublished - 1981

Keywords

  • IR-61592

Cite this

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title = "High Oxygen Ion Conduction in Sintered Oxides of the $Bi_2O_3-Dy_2O_3$ System",
abstract = "The phase diagram of the Bi2O3-Dy2O3 system was investigated. A monophasicfcc structure was stabilized for samples containing 28.5–50.0 mole percent (m/o) Dy2O3. Above and below this concentration range polyphasic regionsappear. The fcc phase showed high oxygen ion conduction. The ionictransference number is equal to one for specimens containing 28.5–40.0 m/o Dy2O3, whereas an electronic component is introduced at low temperaturesfor specimens containing 50.0 m/o Dy2O3. The conductivity of (Bi2O3)0.715(Dy2O3)0.285 is 0.71 Omega–1m–1 and 14.4 Omega–1m–1 at 773 and 973 K, respectively.Relations were found between the ionic radius, the conductivity, and the minimumconcentration of lanthanide necessary to stabilize the fcc phase. It is concludedthat the highest ionic conductivity will be found in the system Bi2O3-Er2O3or Bi2O3-Tm2O3. From a study of relations between the activation energy,log sigma0 and the composition it is concluded that two conductivity mechanismsplay a role.",
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author = "M.J. Verkerk and A.J. Burggraaf",
year = "1981",
doi = "10.1149/1.2127391",
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volume = "128",
pages = "75--82",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "The Electrochemical Society Inc.",
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High Oxygen Ion Conduction in Sintered Oxides of the $Bi_2O_3-Dy_2O_3$ System. / Verkerk, M.J.; Burggraaf, A.J.

In: Journal of the Electrochemical Society, Vol. 128, No. 1, 1981, p. 75-82.

Research output: Contribution to journalArticleAcademic

TY - JOUR

T1 - High Oxygen Ion Conduction in Sintered Oxides of the $Bi_2O_3-Dy_2O_3$ System

AU - Verkerk, M.J.

AU - Burggraaf, A.J.

PY - 1981

Y1 - 1981

N2 - The phase diagram of the Bi2O3-Dy2O3 system was investigated. A monophasicfcc structure was stabilized for samples containing 28.5–50.0 mole percent (m/o) Dy2O3. Above and below this concentration range polyphasic regionsappear. The fcc phase showed high oxygen ion conduction. The ionictransference number is equal to one for specimens containing 28.5–40.0 m/o Dy2O3, whereas an electronic component is introduced at low temperaturesfor specimens containing 50.0 m/o Dy2O3. The conductivity of (Bi2O3)0.715(Dy2O3)0.285 is 0.71 Omega–1m–1 and 14.4 Omega–1m–1 at 773 and 973 K, respectively.Relations were found between the ionic radius, the conductivity, and the minimumconcentration of lanthanide necessary to stabilize the fcc phase. It is concludedthat the highest ionic conductivity will be found in the system Bi2O3-Er2O3or Bi2O3-Tm2O3. From a study of relations between the activation energy,log sigma0 and the composition it is concluded that two conductivity mechanismsplay a role.

AB - The phase diagram of the Bi2O3-Dy2O3 system was investigated. A monophasicfcc structure was stabilized for samples containing 28.5–50.0 mole percent (m/o) Dy2O3. Above and below this concentration range polyphasic regionsappear. The fcc phase showed high oxygen ion conduction. The ionictransference number is equal to one for specimens containing 28.5–40.0 m/o Dy2O3, whereas an electronic component is introduced at low temperaturesfor specimens containing 50.0 m/o Dy2O3. The conductivity of (Bi2O3)0.715(Dy2O3)0.285 is 0.71 Omega–1m–1 and 14.4 Omega–1m–1 at 773 and 973 K, respectively.Relations were found between the ionic radius, the conductivity, and the minimumconcentration of lanthanide necessary to stabilize the fcc phase. It is concludedthat the highest ionic conductivity will be found in the system Bi2O3-Er2O3or Bi2O3-Tm2O3. From a study of relations between the activation energy,log sigma0 and the composition it is concluded that two conductivity mechanismsplay a role.

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JO - Journal of the Electrochemical Society

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