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Leaching Behavior of Sodium from Fine Particles of Soda–Lime–Silicate Glass in Acid Solution

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The leaching behavior of Na from soda–lime–silicate glass was investigated by preparing glass powders with average particle diameters of 53 and 19 m, and leaching in HNO3 at 90°−140°C. A new theoretical equation for Na leaching from a spherical particle is proposed based on the assumption that a rate-determining process is the three-dimensional self-diffusion of Na in glass. The diffusion constant (D) of Na in glass was obtained by fitting the experimental data to a theoretical equation. The values of D and activation energy obtained are comparable to those obtained in other studies on larger particles.

Document Type: Communications


Affiliations: 1: National Institute of Advanced Industrial Science and Technology, Osaka 563-8577, Japan 2: PRESTO, Japan Science and Technology Corporation, Osaka 563-8577, Japan 3: Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Shiga 520-2194, Japan 4: Himeji Institute of Technology, 671-2001 Hyogo, Japan

Publication date: 2005-10-01

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