1. Leaching of Lead and Connectivity of Plumbate Networks in Lead Silicate Glasses.
- Author
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Mizuno, Megumi, Takahashi, Masahide, Takaishi, Taigo, and Yoko, Toshinobu
- Subjects
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LEAD silicates , *GLASS , *LEACHING , *SILICATES , *CERAMICS , *AMORPHOUS substances , *MATERIALS science - Abstract
The formation of a plumbate network in binary lead silicate glasses was examined based on the leaching behavior of Pb2+ in lead silicate glasses over a wide composition region. The effective diffusion coefficient of Pb2+ at 40°C was on the order of 10−17 m2/s for PbO<35 mol% glasses, and increased three orders of magnitude for 35–50 mol% PbO contents. Such a steep composition dependence is considered to be because of changes in the medium or longer range structure. That is, it is proposed that the plumbate network forms a percolative 3D network in the composition region to form diffusion paths for the lead ions. In addition, the present results indicate that the lead ion exists as a network former over the entire glass forming composition range of the binary silicate glasses. [ABSTRACT FROM AUTHOR]
- Published
- 2005
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