Structure and dynamics of phosphate glasses: From ultra- to orthophosphate composition

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The short- and intermediate-range order as well as atomic dynamics in various phosphate glasses were investigated using neutron diffraction and inelastic scattering. The 3-D network of corner-sharing PO{sub 4} tetrahedra in g-P{sub 2}O{sub 5} is highly unstable and hygroscopic. Depolymerization of the network to chain-like structure and eventually to unconnected PO{sub 4} units by incorporating alkali, alkali-earth or transition-metal modifiers is clearly evident in the structure factor S(Q) in the Q < 4 {angstrom}{sup -1} region. The dynamic response to such structural changes is equally strong: e.g., the broad P-O stretching band extending to 170 meV in g-P{sub 2}O{sub 5} ... continued below

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17 p.

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Loong, C.K.; Price, D.L.; Sales, B.C. & Boatner, L.A. July 14, 1997.

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The short- and intermediate-range order as well as atomic dynamics in various phosphate glasses were investigated using neutron diffraction and inelastic scattering. The 3-D network of corner-sharing PO{sub 4} tetrahedra in g-P{sub 2}O{sub 5} is highly unstable and hygroscopic. Depolymerization of the network to chain-like structure and eventually to unconnected PO{sub 4} units by incorporating alkali, alkali-earth or transition-metal modifiers is clearly evident in the structure factor S(Q) in the Q < 4 {angstrom}{sup -1} region. The dynamic response to such structural changes is equally strong: e.g., the broad P-O stretching band extending to 170 meV in g-P{sub 2}O{sub 5} is sharpened and shifted down to {approximately}125 meV in the orthophosphate composition. The correlation between the microscopic structure and physical properties for a series of P-glasses is discussed.

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17 p.

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INIS; OSTI as DE97054132

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  • International conference on neutron scattering (ICNS), Toronto (Canada), 17-21 Aug 1997

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  • Other: DE97054132
  • Report No.: ANL/IPNS/CP--93090
  • Report No.: CONF-970814--
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 555277
  • Archival Resource Key: ark:/67531/metadc690449

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  • July 14, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 16, 2015, 5:19 p.m.

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Loong, C.K.; Price, D.L.; Sales, B.C. & Boatner, L.A. Structure and dynamics of phosphate glasses: From ultra- to orthophosphate composition, article, July 14, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc690449/: accessed December 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.