Structural studies of hollandite-based radioactive waste forms

K. R. Whittle; S. E. Ashbrook; S. A.T. Redfern; G. R. Lumpkin; J. P. Attfield; M. Dove; I. Farnan

Structural studies of hollandite-based radioactive waste forms

K. R. Whittle^*, S. E. Ashbrook, S. A.T. Redfern, G. R. Lumpkin, J. P. Attfield, M. Dove, I. Farnan

^*Corresponding author for this work

University of Cambridge

Research output: Contribution to journal › Conference article › peer-review

4 Citations (Scopus)

Abstract

Hollandites with compositions Ba_1.2-xCs_xMg _1.2-x/2Ti_6.8+x/2 O₁₆, and Ba _1.2-xCs_xAl_2.4-xTi_5.6+xO ₁₆ (x=0, 0.1, 0.25) have been synthesised using a modified alkoxide/acetate precursor route. The samples have been sintered using two procedures; hot isostatic pressing and sintering at ambient pressure. X-ray powder diffraction has shown samples from both systems to form tetragonal hollandites, with little change when pressed by both methods. Cs-133 MAS NMR spectra have been recorded showing the chemical shift in Al containing samples to be ∼250ppm, and in Mg hollandites ∼175ppm and 200ppm, with little change when prepared by both methods.

Original language	English
Pages (from-to)	339-344
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	807
Publication status	Published - 2004
Externally published	Yes
Event	Scientific Basis for Nuclear Waste Management XXVII - Kalmar, Sweden Duration: Jun 15 2003 → Jun 19 2003

ASJC Scopus Subject Areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Cite this

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title = "Structural studies of hollandite-based radioactive waste forms",

abstract = "Hollandites with compositions Ba1.2-xCsxMg 1.2-x/2Ti6.8+x/2 O16, and Ba 1.2-xCsxAl2.4-xTi5.6+xO 16 (x=0, 0.1, 0.25) have been synthesised using a modified alkoxide/acetate precursor route. The samples have been sintered using two procedures; hot isostatic pressing and sintering at ambient pressure. X-ray powder diffraction has shown samples from both systems to form tetragonal hollandites, with little change when pressed by both methods. Cs-133 MAS NMR spectra have been recorded showing the chemical shift in Al containing samples to be ∼250ppm, and in Mg hollandites ∼175ppm and 200ppm, with little change when prepared by both methods.",

author = "Whittle, {K. R.} and Ashbrook, {S. E.} and Redfern, {S. A.T.} and Lumpkin, {G. R.} and Attfield, {J. P.} and M. Dove and I. Farnan",

year = "2004",

language = "English",

volume = "807",

pages = "339--344",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

note = "Scientific Basis for Nuclear Waste Management XXVII ; Conference date: 15-06-2003 Through 19-06-2003",

}

TY - JOUR

T1 - Structural studies of hollandite-based radioactive waste forms

AU - Whittle, K. R.

AU - Ashbrook, S. E.

AU - Redfern, S. A.T.

AU - Lumpkin, G. R.

AU - Attfield, J. P.

AU - Dove, M.

AU - Farnan, I.

PY - 2004

Y1 - 2004

N2 - Hollandites with compositions Ba1.2-xCsxMg 1.2-x/2Ti6.8+x/2 O16, and Ba 1.2-xCsxAl2.4-xTi5.6+xO 16 (x=0, 0.1, 0.25) have been synthesised using a modified alkoxide/acetate precursor route. The samples have been sintered using two procedures; hot isostatic pressing and sintering at ambient pressure. X-ray powder diffraction has shown samples from both systems to form tetragonal hollandites, with little change when pressed by both methods. Cs-133 MAS NMR spectra have been recorded showing the chemical shift in Al containing samples to be ∼250ppm, and in Mg hollandites ∼175ppm and 200ppm, with little change when prepared by both methods.

AB - Hollandites with compositions Ba1.2-xCsxMg 1.2-x/2Ti6.8+x/2 O16, and Ba 1.2-xCsxAl2.4-xTi5.6+xO 16 (x=0, 0.1, 0.25) have been synthesised using a modified alkoxide/acetate precursor route. The samples have been sintered using two procedures; hot isostatic pressing and sintering at ambient pressure. X-ray powder diffraction has shown samples from both systems to form tetragonal hollandites, with little change when pressed by both methods. Cs-133 MAS NMR spectra have been recorded showing the chemical shift in Al containing samples to be ∼250ppm, and in Mg hollandites ∼175ppm and 200ppm, with little change when prepared by both methods.

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M3 - Conference article

AN - SCOPUS:12844282242

SN - 0272-9172

VL - 807

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EP - 344

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Scientific Basis for Nuclear Waste Management XXVII

Y2 - 15 June 2003 through 19 June 2003

ER -

Structural studies of hollandite-based radioactive waste forms

Abstract

ASJC Scopus Subject Areas

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