Structure and conductivity of pyrochlore and fluorite type solid solutions

A.J. Burggraaf; T. van Dijk; M.J. Verkerk

doi:10.1016/0167-2738(81)90306-4

Structure and conductivity of pyrochlore and fluorite type solid solutions

A.J. Burggraaf, T. van Dijk, M.J. Verkerk

Inorganic Materials Science

Research output: Contribution to journal › Article › Academic

125 Citations (Scopus)

134 Downloads (Pure)

Abstract

High oxygen conductivities can be achieved in cation ordered LnxZrl-x=xO2-l/2x (Ln=Gd, Nd) solid solutions with pyrochlore (P) structure. High values of the pre-exponential factor σo are correlated with the degree of anion disorder in the 8b oxygen sublattice (neutron diffraction). The activation energy ΔH is lowered by cation ordering (F-P transition; effect of ) due to the occurence of a preferential diffusion path. Maximum oxygen conductivity is achieved in (1−x)Bi2O3−x Ln2O3 solid solutions with fluorite related δ-Bi2O3 structure for Ln=Er and x=0.20. Neutron diffraction measurements indicate the occurence of short range ordering in “Er-O units” with relative small interatomic distances at T < 820 K. This leads to an increased activation energy.

Original language	English
Pages (from-to)	519-522
Journal	Solid state ionics
Volume	5
DOIs	https://doi.org/10.1016/0167-2738(81)90306-4
Publication status	Published - 1981

Access to Document

10.1016/0167-2738(81)90306-4

Burggraaf81structureFinal published version, 235 KB

Cite this

@article{bfd1ca5c8d5c4e2c8ceaf99511026dc0,

title = "Structure and conductivity of pyrochlore and fluorite type solid solutions",

abstract = "High oxygen conductivities can be achieved in cation ordered LnxZrl-x=xO2-l/2x (Ln=Gd, Nd) solid solutions with pyrochlore (P) structure. High values of the pre-exponential factor σo are correlated with the degree of anion disorder in the 8b oxygen sublattice (neutron diffraction). The activation energy ΔH is lowered by cation ordering (F-P transition; effect of ) due to the occurence of a preferential diffusion path. Maximum oxygen conductivity is achieved in (1−x)Bi2O3−x Ln2O3 solid solutions with fluorite related δ-Bi2O3 structure for Ln=Er and x=0.20. Neutron diffraction measurements indicate the occurence of short range ordering in “Er-O units” with relative small interatomic distances at T < 820 K. This leads to an increased activation energy.",

author = "A.J. Burggraaf and {van Dijk}, T. and M.J. Verkerk",

year = "1981",

doi = "10.1016/0167-2738(81)90306-4",

language = "English",

volume = "5",

pages = "519--522",

journal = "Solid state ionics",

issn = "0167-2738",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Structure and conductivity of pyrochlore and fluorite type solid solutions

AU - Burggraaf, A.J.

AU - van Dijk, T.

AU - Verkerk, M.J.

PY - 1981

Y1 - 1981

N2 - High oxygen conductivities can be achieved in cation ordered LnxZrl-x=xO2-l/2x (Ln=Gd, Nd) solid solutions with pyrochlore (P) structure. High values of the pre-exponential factor σo are correlated with the degree of anion disorder in the 8b oxygen sublattice (neutron diffraction). The activation energy ΔH is lowered by cation ordering (F-P transition; effect of ) due to the occurence of a preferential diffusion path. Maximum oxygen conductivity is achieved in (1−x)Bi2O3−x Ln2O3 solid solutions with fluorite related δ-Bi2O3 structure for Ln=Er and x=0.20. Neutron diffraction measurements indicate the occurence of short range ordering in “Er-O units” with relative small interatomic distances at T < 820 K. This leads to an increased activation energy.

AB - High oxygen conductivities can be achieved in cation ordered LnxZrl-x=xO2-l/2x (Ln=Gd, Nd) solid solutions with pyrochlore (P) structure. High values of the pre-exponential factor σo are correlated with the degree of anion disorder in the 8b oxygen sublattice (neutron diffraction). The activation energy ΔH is lowered by cation ordering (F-P transition; effect of ) due to the occurence of a preferential diffusion path. Maximum oxygen conductivity is achieved in (1−x)Bi2O3−x Ln2O3 solid solutions with fluorite related δ-Bi2O3 structure for Ln=Er and x=0.20. Neutron diffraction measurements indicate the occurence of short range ordering in “Er-O units” with relative small interatomic distances at T < 820 K. This leads to an increased activation energy.

U2 - 10.1016/0167-2738(81)90306-4

DO - 10.1016/0167-2738(81)90306-4

M3 - Article

SN - 0167-2738

VL - 5

SP - 519

EP - 522

JO - Solid state ionics

JF - Solid state ionics

ER -

Structure and conductivity of pyrochlore and fluorite type solid solutions

Abstract

Access to Document

Fingerprint

Cite this