Oxide ion conduction in ytterbium-doped strontium cerate

Bonanos, Nikolaos; Ellis, Brian L.; Mahmood, M.N.

doi:10.1016/s0167-2738(88)80105-x

Cited by 101 publications

(100 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The temperature dependence of the crystal structure of the protonic conducting phase SrCe 0.95 Yb 0.05 O  ( ~ 3) 11 has been studied in 25 K steps between 373 K and 1273 K 12 finding no evidence for critical behaviour in either of the two primary order parameters i.e. no evidence for incipient structural phase transitions, in agreement with conclusions drawn from isobaric heat capacity measurements made at higher temperatures.…”

Section: Introductionsupporting

confidence: 76%

Thermoelastic and structural properties of ionically conducting cerate perovskites: (II) SrCeO₃ between 1273 K and 1723 K

et al. 2015

View full text Add to dashboard Cite

The temperature dependence of the crystal structure and the thermoelastic properties of SrCeO 3 have been determined from Rietveld refinement of high resolution, neutron time-of-flight powder diffraction data collected in 5 K intervals between 1273 K and 1723 K. No evidence was found for critical behaviour in the amplitudes of the modes that soften in zone boundary phase transitions in perovskite-structured phases suggesting SrCeO 3 may remain orthorhombic, space group Pbnm from 1.2 K up to the 1 atm melting point of 2266 K. The temperature variation of the crystal structure has been determined from mode decomposition techniques and the structural evolution has been inferred from the temperature-dependences of the spontaneous shear strain and the order parameter associated with the anti-phase tilt. Thermoelastic properties have been derived from the temperature variation of the unit cell, isobaric heat capacity, and atomic displacement parameters and shows good agreement with earlier work carried out on the lightly doped system SrCe 0.95 Yb 0.05 O  ( ~ 3). Temperaturedependent corrections for the bond valence parameters for strontium and cerium are reported.

show abstract

Section: Introductionsupporting

confidence: 76%

Thermoelastic and structural properties of ionically conducting cerate perovskites: (II) SrCeO₃ between 1273 K and 1723 K

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Up to now, only laboratory scale proton conducting fuel cells have been tested, the electrolyte being perovskite type oxides with a general formula as (Sr,Ba)Ce 1-x M x O 3-a where M is a rare earth element, generally Yb. [95][96][97][98][99] Despite barium cerates based ceramics present superior conductivity, the conduction changes from protonic to oxygen ion between 600 and 900°C. [100] Conversely, strontium cerates based materials are lower conductors than barium based ones although the transport number of protons is higher.…”

Section: Reviewsmentioning

confidence: 99%

Advanced Ceramic Materials for High Temperature Applications

Belmonte

2006

Adv Eng Mater

207

View full text Add to dashboard Cite

The increasing interest in ecological aspects related to the reduction of harmful emissions to the atmosphere and, at the same time, the need to achieve higher efficiencies of energy production are the driving forces that justify the current development of advanced ceramic materials for high temperature applications, namely those associated to energy and transportation industries. Ceramic matrix composites (CMCs), thermal barrier coatings (TBCs), environmental barrier coatings (EBCs) and solid oxide fuel cells (SOFCs) are increasingly used to work under the new demanding conditions. In this review, the recent progress and trends in the research and development of CMCs, TBCs, EBCs and SOFCs based on ceramic materials for high temperature applications are highlighted.

show abstract

“…These materials have the ion-hole electroconductivity in oxidizing gas atmospheres. In the temperature interval from 873 to 1173 K the ion conductivity is due to the transport of protons and oxygen ions [3][4][5]. As the temperature rises, the transport number of the protons decreases and that of the oxygen ions increases [3].…”

Section: Introductionmentioning

confidence: 99%

Electrical conductivity of BaCe0.9Nd0.1O3−α in H2+H2O+Ar gas mixture

Bannykh

Kuzin

2003

Ionics

View full text Add to dashboard Cite

Abstract. Electroconductivity of BaCeo.9Ndo .IO3__a was studied as a function of the composition of the H2+H20+Ar mixture and temperature in the interval from 873 to 1173 K. It was shown that the electroconductivity was independent of Pea (0.97 to 0.10 atm) and Po: (10 --~ to 10 -26 atm), but depended on Pmo (0.08 to 0.005 atm). A mathematical processing of the Peao dependencies of the electroconductivity, which was performed in terms of a classical model of defect formation in hightemperature proton-conducting solid electrolytes, yielded equilibrium constants of the reaction of water dissolution in BaCe0.gNd0AO_~_a and mobilities of protons and oxygen ions. The temperature dependencies of these quantities were used to determine the mobility activation energies of protons (E a = 34+7 kJ/mole) and oxygen ions (E~ = 72+8 kJ/mole), and also the enthalpy (AH = -150+25 kJ/mole) and the entropy (AS = 153+26 kJ/mole.K) of the reaction of water dissolution in BaCeo oNdo lOs-a-

show abstract

Oxide ion conduction in ytterbium-doped strontium cerate

Cited by 101 publications

References 15 publications

Thermoelastic and structural properties of ionically conducting cerate perovskites: (II) SrCeO₃ between 1273 K and 1723 K

Thermoelastic and structural properties of ionically conducting cerate perovskites: (II) SrCeO₃ between 1273 K and 1723 K

Advanced Ceramic Materials for High Temperature Applications

Electrical conductivity of BaCe0.9Nd0.1O3−α in H2+H2O+Ar gas mixture

Contact Info

Product

Resources

About

Oxide ion conduction in ytterbium-doped strontium cerate

Cited by 101 publications

References 15 publications

Thermoelastic and structural properties of ionically conducting cerate perovskites: (II) SrCeO3 between 1273 K and 1723 K

Thermoelastic and structural properties of ionically conducting cerate perovskites: (II) SrCeO3 between 1273 K and 1723 K

Advanced Ceramic Materials for High Temperature Applications

Electrical conductivity of BaCe0.9Nd0.1O3−α in H2+H2O+Ar gas mixture

Contact Info

Product

Resources

About

Thermoelastic and structural properties of ionically conducting cerate perovskites: (II) SrCeO₃ between 1273 K and 1723 K

Thermoelastic and structural properties of ionically conducting cerate perovskites: (II) SrCeO₃ between 1273 K and 1723 K