Glasses and crystalline A3Al2(PO4)3 (A = Na, Li): An impedance and 31P, 27Al, 23Na and 7Li MAS-NMR study

Laureano Moreno-Real; Pilar Maldonado-Manso; Laura Leon-Reina; Enrique R. Losilla; Fatima E. Mouahid; Mohammed Zahir; Jesus Sanz

doi:10.1039/b206855a

Glasses and crystalline A₃Al₂(PO₄)₃ (A = Na, Li): An impedance and ³¹P, ²⁷Al, ²³Na and ⁷Li MAS-NMR study

Laureano Moreno-Real^*
, Pilar Maldonado-Manso
, Laura Leon-Reina
, Enrique R. Losilla
, Fatima E. Mouahid
, Mohammed Zahir
, Jesus Sanz

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

A new vitreous phase with Na₃Al₂(PO₄)₃ composition has been prepared. Its crystallisation has been optimised by annealing at low temperature, giving crystalline c-Na₃Al₂(PO₄)₃ with Sc₂(WO₄)₃-type structure. The direct synthesis of vitreous Li₃Al₂(PO₄)₃ has been attempted but it was unsuccessful. Ion exchange reaction has been carried out in Na₃Al₂(PO₄)₃ glass to obtain the lithiated vitreous solid, v-Li₃Al₂(PO₄)₃. On heating, v-Li₃Al₂(PO₄)₃ decomposes to yield crystalline AlPO₄ and Li₃PO₄ phases. The three solids, with NASICON-like stoichiometries, have been thermal and electrically characterised. DTA and thermodiffractometric studies of the two glass solids have allowed the characterisation of their thermal behaviours including crystallisation. The grain boundary contributions to the total impedance are almost absent in the two vitreous phases. The electrical conductivity values are ∼ 10^-6 S cm^-1 at 150 °C. The ³¹P, ²³Na, ²⁷Al and ⁷Li MAS-NMR spectra for these materials provide some insight into the disordered constitution of the vitreous phases and the low mobility of the alkaline cations.

Original language	English
Pages (from-to)	3681-3687
Number of pages	7
Journal	Journal of Materials Chemistry
Volume	12
Issue number	12
DOIs	https://doi.org/10.1039/b206855a
State	Published - 1 Dec 2002
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
Materials Chemistry

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10.1039/b206855a

Cite this

@article{ac9c488d8f99420eaf7f418328a74c6a,

title = "Glasses and crystalline A3Al2(PO4)3 (A = Na, Li): An impedance and 31P, 27Al, 23Na and 7Li MAS-NMR study",

abstract = "A new vitreous phase with Na3Al2(PO4)3 composition has been prepared. Its crystallisation has been optimised by annealing at low temperature, giving crystalline c-Na3Al2(PO4)3 with Sc2(WO4)3-type structure. The direct synthesis of vitreous Li3Al2(PO4)3 has been attempted but it was unsuccessful. Ion exchange reaction has been carried out in Na3Al2(PO4)3 glass to obtain the lithiated vitreous solid, v-Li3Al2(PO4)3. On heating, v-Li3Al2(PO4)3 decomposes to yield crystalline AlPO4 and Li3PO4 phases. The three solids, with NASICON-like stoichiometries, have been thermal and electrically characterised. DTA and thermodiffractometric studies of the two glass solids have allowed the characterisation of their thermal behaviours including crystallisation. The grain boundary contributions to the total impedance are almost absent in the two vitreous phases. The electrical conductivity values are ∼ 10-6 S cm-1 at 150 °C. The 31P, 23Na, 27Al and 7Li MAS-NMR spectra for these materials provide some insight into the disordered constitution of the vitreous phases and the low mobility of the alkaline cations.",

author = "Laureano Moreno-Real and Pilar Maldonado-Manso and Laura Leon-Reina and Losilla, \{Enrique R.\} and Mouahid, \{Fatima E.\} and Mohammed Zahir and Jesus Sanz",

year = "2002",

month = dec,

day = "1",

doi = "10.1039/b206855a",

language = "English",

volume = "12",

pages = "3681--3687",

journal = "Journal of Materials Chemistry",

issn = "0959-9428",

publisher = "Royal Society of Chemistry",

number = "12",

}

TY - JOUR

T1 - Glasses and crystalline A3Al2(PO4)3 (A = Na, Li)

T2 - An impedance and 31P, 27Al, 23Na and 7Li MAS-NMR study

AU - Moreno-Real, Laureano

AU - Maldonado-Manso, Pilar

AU - Leon-Reina, Laura

AU - Losilla, Enrique R.

AU - Mouahid, Fatima E.

AU - Zahir, Mohammed

AU - Sanz, Jesus

PY - 2002/12/1

Y1 - 2002/12/1

N2 - A new vitreous phase with Na3Al2(PO4)3 composition has been prepared. Its crystallisation has been optimised by annealing at low temperature, giving crystalline c-Na3Al2(PO4)3 with Sc2(WO4)3-type structure. The direct synthesis of vitreous Li3Al2(PO4)3 has been attempted but it was unsuccessful. Ion exchange reaction has been carried out in Na3Al2(PO4)3 glass to obtain the lithiated vitreous solid, v-Li3Al2(PO4)3. On heating, v-Li3Al2(PO4)3 decomposes to yield crystalline AlPO4 and Li3PO4 phases. The three solids, with NASICON-like stoichiometries, have been thermal and electrically characterised. DTA and thermodiffractometric studies of the two glass solids have allowed the characterisation of their thermal behaviours including crystallisation. The grain boundary contributions to the total impedance are almost absent in the two vitreous phases. The electrical conductivity values are ∼ 10-6 S cm-1 at 150 °C. The 31P, 23Na, 27Al and 7Li MAS-NMR spectra for these materials provide some insight into the disordered constitution of the vitreous phases and the low mobility of the alkaline cations.

AB - A new vitreous phase with Na3Al2(PO4)3 composition has been prepared. Its crystallisation has been optimised by annealing at low temperature, giving crystalline c-Na3Al2(PO4)3 with Sc2(WO4)3-type structure. The direct synthesis of vitreous Li3Al2(PO4)3 has been attempted but it was unsuccessful. Ion exchange reaction has been carried out in Na3Al2(PO4)3 glass to obtain the lithiated vitreous solid, v-Li3Al2(PO4)3. On heating, v-Li3Al2(PO4)3 decomposes to yield crystalline AlPO4 and Li3PO4 phases. The three solids, with NASICON-like stoichiometries, have been thermal and electrically characterised. DTA and thermodiffractometric studies of the two glass solids have allowed the characterisation of their thermal behaviours including crystallisation. The grain boundary contributions to the total impedance are almost absent in the two vitreous phases. The electrical conductivity values are ∼ 10-6 S cm-1 at 150 °C. The 31P, 23Na, 27Al and 7Li MAS-NMR spectra for these materials provide some insight into the disordered constitution of the vitreous phases and the low mobility of the alkaline cations.

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U2 - 10.1039/b206855a

DO - 10.1039/b206855a

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