A comparison of the effect of rare earth vs Si site doping on the conductivities of apatite-type rare earth silicates

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A comparison of the effect of rare earth vs Si site doping on the conductivities of apatite-type rare earth silicates. / Sansom, J. E.H.; Kendrick, E.; Tolchard, J. R.; Islam, M. S.; Slater, P. R.

In: Journal of Solid State Electrochemistry, Vol. 10, No. 8, 01.08.2006, p. 562-568.

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@article{3801c2b44ca0482da93d421ddfab9e68,
title = "A comparison of the effect of rare earth vs Si site doping on the conductivities of apatite-type rare earth silicates",
abstract = "Apatite-type lanthanum silicate (La9.33Si6O 26) has been attracting significant recent interest due to its high oxide ion conductivity. In this paper, synthesis and conductivity data for a range of doped samples (Mg, Ca, Sr, Ba, B, Ga and Zn) are reported, in particular, to compare the effect of rare earth vs Si site doping. The results show that Ga, B and Zn favour substitution on the Si site, while Ca, Sr and Ba favour La-site substitution. Mg is shown to be an ambi-site dopant, substituting on either site depending on the starting composition. The samples doped on the Si site show higher conductivities than comparable samples doped on the La site, providing further support for the importance of the silicate network in the conduction process, as initially predicted by atomistic modelling studies. For Ga doping on the Si site, the effect of varying the rare-earth size on the conductivities is also reported.",
keywords = "Apatite, Dopant, Oxide ion conduction, Rare earth",
author = "Sansom, {J. E.H.} and E. Kendrick and Tolchard, {J. R.} and Islam, {M. S.} and Slater, {P. R.}",
year = "2006",
month = aug,
day = "1",
doi = "10.1007/s10008-006-0129-8",
language = "English",
volume = "10",
pages = "562--568",
journal = "Journal of Solid State Electrochemistry",
issn = "1432-8488",
publisher = "Springer",
number = "8",

}

RIS

TY - JOUR

T1 - A comparison of the effect of rare earth vs Si site doping on the conductivities of apatite-type rare earth silicates

AU - Sansom, J. E.H.

AU - Kendrick, E.

AU - Tolchard, J. R.

AU - Islam, M. S.

AU - Slater, P. R.

PY - 2006/8/1

Y1 - 2006/8/1

N2 - Apatite-type lanthanum silicate (La9.33Si6O 26) has been attracting significant recent interest due to its high oxide ion conductivity. In this paper, synthesis and conductivity data for a range of doped samples (Mg, Ca, Sr, Ba, B, Ga and Zn) are reported, in particular, to compare the effect of rare earth vs Si site doping. The results show that Ga, B and Zn favour substitution on the Si site, while Ca, Sr and Ba favour La-site substitution. Mg is shown to be an ambi-site dopant, substituting on either site depending on the starting composition. The samples doped on the Si site show higher conductivities than comparable samples doped on the La site, providing further support for the importance of the silicate network in the conduction process, as initially predicted by atomistic modelling studies. For Ga doping on the Si site, the effect of varying the rare-earth size on the conductivities is also reported.

AB - Apatite-type lanthanum silicate (La9.33Si6O 26) has been attracting significant recent interest due to its high oxide ion conductivity. In this paper, synthesis and conductivity data for a range of doped samples (Mg, Ca, Sr, Ba, B, Ga and Zn) are reported, in particular, to compare the effect of rare earth vs Si site doping. The results show that Ga, B and Zn favour substitution on the Si site, while Ca, Sr and Ba favour La-site substitution. Mg is shown to be an ambi-site dopant, substituting on either site depending on the starting composition. The samples doped on the Si site show higher conductivities than comparable samples doped on the La site, providing further support for the importance of the silicate network in the conduction process, as initially predicted by atomistic modelling studies. For Ga doping on the Si site, the effect of varying the rare-earth size on the conductivities is also reported.

KW - Apatite

KW - Dopant

KW - Oxide ion conduction

KW - Rare earth

UR - http://www.scopus.com/inward/record.url?scp=33745204443&partnerID=8YFLogxK

U2 - 10.1007/s10008-006-0129-8

DO - 10.1007/s10008-006-0129-8

M3 - Article

AN - SCOPUS:33745204443

VL - 10

SP - 562

EP - 568

JO - Journal of Solid State Electrochemistry

JF - Journal of Solid State Electrochemistry

SN - 1432-8488

IS - 8

ER -