Atomic disorder in Gd2Zr2O7 pyrochlore

Zhang, F. X.; Lang, M.; Ewing, R. C.

doi:10.1063/1.4921268

Title: Atomic disorder in Gd₂Zr₂O₇ pyrochlore

Abstract

Gd₂Zr₂O₇ pyrochlore with different degrees of cation disorder were synthesized by isothermal annealing at various temperatures (1100–1550 °C), and the related changes in the structure were investigated by ambient and high pressure x-ray diffraction (XRD) measurements. Unit cell parameters increase almost linearly with increasing treatment temperature. The degree of cation order in pyrochlore also increases with the increase of temperature, but saturates at ~60%. The compressibility of the pyrochlore structures decreases when the degree of cation order increases. Lastly, high pressure XRD measurements also indicate that the phase stability of Gd₂Zr₂O₇ is not very sensitive to the degree of atomic disorder in the pyrochlore structure.

Authors:

Zhang, F. X. ^[1]; Lang, M. ^[2]; Ewing, R. C. ^[3]

Yanshan Univ., Hebei (China); Univ. of Michigan, Ann Arbor, MI (United States)
Univ. of Tennessee, Knoxville, TN (United States)
Stanford Univ., Stanford, CA (United States)

Publication Date:: Wed May 13 00:00:00 EDT 2015

Research Org.:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1289953

Grant/Contract Number:: NA0001977

Resource Type:: Accepted Manuscript

Journal Name:: Applied Physics Letters

Additional Journal Information:: Journal Volume: 106; Journal Issue: 19; Journal ID: ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 74 ATOMIC AND MOLECULAR PHYSICS; 36 MATERIALS SCIENCE; X-ray diffraction; high pressure; diamond anvil cells; crystal defects; crystal structure

Citation Formats


                    Zhang, F. X., Lang, M., and Ewing, R. C. Atomic disorder in Gd2Zr2O7 pyrochlore.  United States: N. p., 2015. 
Web.  doi:10.1063/1.4921268.

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                    Zhang, F. X., Lang, M., & Ewing, R. C. Atomic disorder in Gd2Zr2O7 pyrochlore.  United States.  https://doi.org/10.1063/1.4921268

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                    Zhang, F. X., Lang, M., and Ewing, R. C. Wed .  
"Atomic disorder in Gd2Zr2O7 pyrochlore".  United States.  https://doi.org/10.1063/1.4921268.  https://www.osti.gov/servlets/purl/1289953.

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@article{osti_1289953,

  title        = {Atomic disorder in Gd2Zr2O7 pyrochlore},

  author       = {Zhang, F. X. and Lang, M. and Ewing, R. C.},

  abstractNote = {Gd2Zr2O7 pyrochlore with different degrees of cation disorder were synthesized by isothermal annealing at various temperatures (1100–1550 °C), and the related changes in the structure were investigated by ambient and high pressure x-ray diffraction (XRD) measurements. Unit cell parameters increase almost linearly with increasing treatment temperature. The degree of cation order in pyrochlore also increases with the increase of temperature, but saturates at ~60%. The compressibility of the pyrochlore structures decreases when the degree of cation order increases. Lastly, high pressure XRD measurements also indicate that the phase stability of Gd2Zr2O7 is not very sensitive to the degree of atomic disorder in the pyrochlore structure.},

  doi          = {10.1063/1.4921268},

  journal      = {Applied Physics Letters},

  number       = 19,

  volume       = 106,

  place        = {United States},

  year         = {Wed May 13 00:00:00 EDT 2015},

  month        = {Wed May 13 00:00:00 EDT 2015}

}

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Works referencing / citing this record:

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Similar Records

Title: Atomic disorder in Gd2Zr2O7 pyrochlore

Abstract

Citation Formats

Oxygen ion and mixed conductivity in compounds with the fluorite and pyrochlore structure journal, December 1983

Long- and short-range order in stuffed titanate pyrochlores journal, January 2008

Oxide pyrochlores — A review journal, January 1983

Pressure and temperature phase diagram of Gd 2 Ti 2 O 7 under irradiation journal, November 2014

The order–disorder transition in ion-irradiated pyrochlore journal, March 2003

Disorder in Pyrochlore Oxides journal, August 2000

Radiation stability of gadolinium zirconate: A waste form for plutonium disposition journal, December 1999

Radiation Tolerance of Complex Oxides journal, August 2000

Structure change of pyrochlore Sm2Ti2O7 at high pressures journal, May 2005

Heavy-ion irradiation effects in Gd2(Ti2−xZrx)O7 pyrochlores journal, February 2001

Nuclear waste disposal—pyrochlore (A2B2O7): Nuclear waste form for the immobilization of plutonium and “minor” actinides journal, June 2004

Systematics of the pyrochlore structure type, ideal A2B2X6Y journal, June 1984

Ion beam irradiation in La2Zr2O7–Ce2Zr2O7 pyrochlore journal, June 2004

Phase Stability and Pressure Dependence of Defect Formation in Gd 2 Ti 2 O 7 and Gd 2 Zr 2 O 7 Pyrochlores journal, January 2008

Ion-irradiation-induced amorphization of La 2 Zr 2 O 7 pyrochlore journal, August 2002

Structural properties of the fluorite- and pyrochlore-type compounds in the Gd2O3–ZrO2 system xGdO1.5–(1−x)ZrO2 with 0.18≤x≤0.62 journal, November 2003

Pressure-Induced Disordering and Anomalous Lattice Expansion in La 2 Zr 2 O 7 Pyrochlore journal, June 2010

New dense phases of geophysical significance journal, December 1974

Synthesis of new high-pressure pyrochlore phases journal, August 1968

Blue and red up-conversion light emission in TM-doped A2B2O7 oxides journal, May 2016

Molecular dynamics simulation of the structural, elastic, and thermal properties of pyrochlores journal, January 2016

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Probing disorder in pyrochlore oxides using in situ synchrotron diffraction from levitated solids–A thermodynamic perspective journal, July 2018

Molecular dynamics simulation of the structural, elastic, and thermal properties of pyrochlores journal, January 2016

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Pressure-induced phase transition of La 2 Zr 2 O 7 and La 0.5 Gd 1.5 Zr 2 O 7 pyrochlore journal, January 2019

Evidence for percolation diffusion of cations and reordering in disordered pyrochlore from accelerated molecular dynamics journal, September 2017

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Title: Atomic disorder in Gd₂Zr₂O₇ pyrochlore

Oxygen ion and mixed conductivity in compounds with the fluorite and pyrochlore structure
journal, December 1983

Long- and short-range order in stuffed titanate pyrochlores
journal, January 2008

Oxide pyrochlores — A review
journal, January 1983

Pressure and temperature phase diagram of Gd ₂ Ti ₂ O ₇ under irradiation
journal, November 2014

The order–disorder transition in ion-irradiated pyrochlore
journal, March 2003

Disorder in Pyrochlore Oxides
journal, August 2000

Radiation stability of gadolinium zirconate: A waste form for plutonium disposition
journal, December 1999

Radiation Tolerance of Complex Oxides
journal, August 2000

Structure change of pyrochlore Sm2Ti2O7 at high pressures
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Heavy-ion irradiation effects in Gd2(Ti2−xZrx)O7 pyrochlores
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Nuclear waste disposal—pyrochlore (A2B2O7): Nuclear waste form for the immobilization of plutonium and “minor” actinides
journal, June 2004

Systematics of the pyrochlore structure type, ideal A2B2X6Y
journal, June 1984

Ion beam irradiation in La2Zr2O7–Ce2Zr2O7 pyrochlore
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journal, January 2008

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Pressure-Induced Disordering and Anomalous Lattice Expansion in ${La}_{2} {Zr}_{2} O_{7}$ Pyrochlore
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New dense phases of geophysical significance
journal, December 1974

Synthesis of new high-pressure pyrochlore phases
journal, August 1968

Blue and red up-conversion light emission in TM-doped A2B2O7 oxides
journal, May 2016

Molecular dynamics simulation of the structural, elastic, and thermal properties of pyrochlores
journal, January 2016

Investigations of atomic disorder and grain growth kinetics in polycrystalline La2Zr2O7
journal, May 2019

Thermal Durability of YSZ/Nanostructured Gd2Zr2O7 TBC Undergoing Thermal Cycling
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Probing disorder in pyrochlore oxides using in situ synchrotron diffraction from levitated solids–A thermodynamic perspective
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Molecular dynamics simulation of the structural, elastic, and thermal properties of pyrochlores
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Disorder-induced transition from grain boundary to bulk dominated ionic diffusion in pyrochlores
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Pressure-induced phase transition of La ₂ Zr ₂ O ₇ and La _0.5 Gd _1.5 Zr ₂ O ₇ pyrochlore
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