Intermediate-range order in simple metal-phosphate glasses: The effect of metal cations on the phosphate anion distribution

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The technique of high-performance liquid chromatography (HPLC) has been used to probe the phosphate anion distribution in a variety of metal phosphate glasses including glasses made with trivalent metal cations (Al, In, Ga, La). The composition of each glass was chosen so that the average phosphate chain length was between 2 and 4 PO{sub 4} tetrahedra. The widths of the resulting phosphate anion distributions were determined directly from an analysis of the HPLC chromatograms. Literature values for the free energy of formation of the crystalline metal-orthophosphate compounds with respect to P{sub 2}O{sub 5} and the metal oxide, were compared to ... continued below

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13 p.

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Sales, B.C.; Boatner, L.A. & Ramey, J.O. June 1, 1997.

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The technique of high-performance liquid chromatography (HPLC) has been used to probe the phosphate anion distribution in a variety of metal phosphate glasses including glasses made with trivalent metal cations (Al, In, Ga, La). The composition of each glass was chosen so that the average phosphate chain length was between 2 and 4 PO{sub 4} tetrahedra. The widths of the resulting phosphate anion distributions were determined directly from an analysis of the HPLC chromatograms. Literature values for the free energy of formation of the crystalline metal-orthophosphate compounds with respect to P{sub 2}O{sub 5} and the metal oxide, were compared to the chromatogram widths. It was found that the smaller the energy of formation, the wider the distribution of phosphate chains, and the greater the ease of glass formation.

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13 p.

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OSTI as DE97008488

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  • 7. international conference on the structure of non-crystalline materials, Laguna (Italy), 15-19 Sep 1997

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  • Other: DE97008488
  • Report No.: CONF-9709101--1
  • Office of Scientific & Technical Information Report Number: 539888
  • Archival Resource Key: ark:/67531/metadc697079

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  • June 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Jan. 25, 2016, 6:41 p.m.

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Sales, B.C.; Boatner, L.A. & Ramey, J.O. Intermediate-range order in simple metal-phosphate glasses: The effect of metal cations on the phosphate anion distribution, article, June 1, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc697079/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.