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The Structure of Lead-Indium Phosphate Glass

Published online by Cambridge University Press:  22 February 2011

K. Suzuya ,
D. L. Price ,
C.-K. Loong ,
B. C. Sales  and
L. A. Boatner
K. Suzuya
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
D. L. Price
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
C.-K. Loong
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
B. C. Sales
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831
L. A. Boatner
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831
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Abstract

Lead-indium phosphate glasses exhibit a number of useful properties such as a high index-of-refraction, low preparation temperature and melt viscosity, and good chemical durability. The structure of such a glass (composition in wt. %: 65 PbO, 29 P2O5, 6 In2O3) has been investigated by total neutron scattering using the GLAD diffractometer at Argonne's spallation neutron source IPNS. Peaks corresponding to the P-O, Pb-O/In-O, and 0-0 pairs were observed in the radial distribution function. The short-range structure in the glass, in terms of average coordination numbers and bond distances, is compared with those of a pure P2O5 glass and with the crystal structure of lead pyrophosphate, Pb2P2O7. Unlike silicate glasses in which the SiO4 tetrahedra form a 3-dimensional network, the PO4 tetrahedra in phosphate glasses form a chain-like structure. The structural modification by the lead cations in phosphate glasses appears to occur mainly in the medium range affecting the lengths and connectivity of the chain-like structure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 376: Symposium BB – Neutron Scattering in Materials Science , 1994 , 661
Copyright
Copyright © Materials Research Society 1995

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References

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