Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-28T06:21:21.132Z Has data issue: false hasContentIssue false
  • English
  • Français

Synthesis and Structure of Novel A2BO5 Compounds Containing A = Y, Yb, Gd, Sm, and La and B = Zr, Ti, and Sn

Published online by Cambridge University Press:  20 February 2018

R. Newman ,
R.D. Aughterson  and
G.R. Lumpkin
R. Newman
Affiliation:
Imperial College, London, UK
R.D. Aughterson
Affiliation:
Australian Nuclear Science and Technology Organisation
G.R. Lumpkin*
Affiliation:
Australian Nuclear Science and Technology Organisation
*
*(Email: [email protected])
Get access

Abstract

With the aim of creating novel ceramics for applications in nuclear materials with high radiation tolerance, multiple samples with A-B-O stoichiometries ranging from 215 to 227 were synthesized and characterized by a combination of SEM, XRD, and TEM methods. Single-phase defect-fluorite-type compounds with A = Sm or Yb and B = Ti, Zr, and/or Sn are reported; whereas, pyrochlore structured compounds and lanthanide sesquioxide phases were found as major phases in numerous samples. A series of Y-b-Sn-O samples was successfully prepared as nearly single phase or single phase materials. These are essentially defect fluorites with extra weak peaks, most likely due to X-ray scattering from oxygen or oxygen and metal cations. We describe some interesting TEM data and describe selected area diffraction patterns with complex modulations.

Keywords

ceramicchemical compositioncrystallographic structure
Type
Articles
Information
MRS Advances , Volume 3 , Issue 20: Scientific Basis for Nuclear Waste Management XLI , 2018 , pp. 1117 - 1122
Copyright
Copyright © Materials Research Society 2018 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

References:

Lumpkin, G.R., Pruneda, M., Rios, S., Smith, K.L., Trachenko, K., Whittle, K.R., and Zaluzec, N.J. (2007), “Nature of the chemical bond and prediction of radiation tolerance in pyrochlore and defect fluorite compounds”, J. Solid State Chem., 180, 1512–1518.Google Scholar
van Dijk, M.P., de Vries, K.J., and Burggraaf, A.J. (1983) “Oxygen ion and mixed conductivity in compounds with the fluorite and pyrochlore structure. Solid State Ionics, 9 & 10, 913–920.Google Scholar
Lau, G.C., Muegge, B.D., McQueen, T.M., Duncan, E.L., and Cava, R.J. (2006) Stuffed rare earth pyrochlore solid solutions. J. Solid State Chem. 179, 3126–3135.Google Scholar
de los Reyes, M., Whittle, K.R., Zhang, Z., Ashbrook, S.E., Mitchell, M.R., Jang, L.Y., and Lumpkin, G.R. (2013) The pyrochlore to defect fluorite phase transition in Y2Sn2-xZrxO7. RSC Advances 3, 5090–5099.Google Scholar
Zhang, Z., Middleburgh, S.C., de los Reyes, M., Lumpkin, G.R., Kennedy, B.J., Blanchard, P.E.R., Reynolds, E., and Jang, L.Y. (2013) Gradual structural evolution from pyrochlore to defect-fluorite in Y2Sn2-xZrxO7: average versus local structure. J. Phys. Chem. C 117, 26740–26749.CrossRefGoogle Scholar
Shepelev, Y.F. and Petrova, M.A. (2008) Crystal structures of Ln2TiO5 (Ln = Gd, Dy) polymorphs. Inorg. Mater. 44, 1354–1361.Google Scholar
Aughterson, R.D., Lumpkin, G.R., de los Reyes, M., Sharma, N., Ling, C.D., Gault, B., Smith, K.L., Avdeev, M, and Cairney, J.M. (2014) Crystal structures of orthorhombic, hexagonal, and cubic compounds of the Sm(x)Yb(2−x)TiO5 series. J. Solid State Chem. 213, 182–192.CrossRefGoogle Scholar
Aughterson, R.D., Lumpkin, G.R., Thorogood, G.J., Zhang, Z., Gault, B., and Cairney, J.M. (2015) Crystal chemistry of the orthorhombic Ln2TiO5 compounds with Ln = La, Pr, Nd, Sm, Gd, Tb and Dy. J. Solid State Chem. 227, 60–67.Google Scholar
Tracy, C.L., Lang, M., Zhang, Z., Zhang, F., Wang, Z., and Ewing, R.C. (2012) Structural response of A2TiO5 (A = La, Nd, Sm, Gd) to swift heavy ion irradiation. Acta Materialia 60, 4477–4486.Google Scholar
Aughterson, R.D., Lumpkin, G.R., Ionescu, M., de los Reyes, M., Gault, B., Whittle, K.R., Smith, K.L., and Cairney, J.M. (2015) Ion-irradiation resistance of the orthorhombic Ln2TiO5 (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb and Dy) series. J. Nucl. Mater. 467, 683–691.Google Scholar
Aughterson, R.D., Lumpkin, G.R., de los Reyes, M., Gault, B., Baldo, P., Ryan, E., Whittle, K.R., Smith, K.L., and Cairney, J.M. (2016) Ion-irradiation resistance of the orthorhombic Ln2TiO5 (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb and Dy) series. J. Nucl. Mater. 471, 17–24.Google Scholar
Aughterson, R.D., Lumpkin, G.R., Smith, K.L., Zhang, Z., Sharma, N., and Cairney, J.M. (2018) Crystal structures of orthorhombic, hexagonal, and cubic compounds of the Sm(x)Yb(2−x)TiO5 series. Ceram. Int. 4, 511–519.Google Scholar
Lyashenko, L.P. and Shcherbakova, L.G. (2012) X-ray diffraction data for fluorite-like Gd2ZrO5 and Gd2HfO5. Inorganic Materials 48, 54–56.Google Scholar
Heremans, C. and Wuensch, B.J. (1995) Fast ion conducting Y2(ZryTi1-y)2O7 pyrochlores: neutron Rietveld analysis of disorder induced by Zr substitution. J. Solid State Chem., 117, 108–121.Google Scholar
Shannon, R.D. (1976) Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallographica A 32, 751–767.Google Scholar
Kong, L., Zhang, Y., Karatchevtseva, I., Lumpkin, G.R., and Triani, G. (2014) Synthesis and characterization of Nd2SnxZr2-xO7 pyrochlore ceramics. Ceramics International 40, 651–657.Google Scholar
Kong, L., Zhang, Z., de los Reyes, M., Karatchevtseva, I., Lumpkin, G.R., Triani, G., and Aughterson, R.D. (2015) Soft chemical synthesis and structural characterisation of Y2HfxTi2-xO7. Ceramics International 41, 5309–5317.Google Scholar