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Abstract <p>Glass of the composition (mol %, as synthesized) 6Na<sub>2</sub>O·18B<sub>2</sub>O<sub>3</sub>·70SiO<sub>2</sub>·6Ni<sub>2</sub>O<sub>3</sub>, heat-treated at 550°C for 96 h is studied using scanning electron microscopy, and its chemical stability to an aqueous 3 M HCl solution is also studied. It is established that this glass has an interconnected phase-separated structure. The general nature of its leaching process is controlled by diffusion. Compared to iron-containing glass of a similar composition, the extraction rate of Na<sub>2</sub>O and B<sub>2</sub>O<sub>3</sub> is reduced by a factor of 2. Nickel oxide is predominantly found in the chemically unstable glass phase, most of it passing into the leaching solution. The suitability of nickel-containing phase-separated glass for producing porous glass with through porosity (~30%) is demonstrated.</p>

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Leaching Kinetics of Nickel Oxide-Doped Sodium Borosilicate Glass

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • M. Yu. Konon,
  • F. K. Klyushev,
  • D. P. Danilovich,
  • E. A. Semenova,
  • L. F. Dikaya

摘要

Abstract

Glass of the composition (mol %, as synthesized) 6Na2O·18B2O3·70SiO2·6Ni2O3, heat-treated at 550°C for 96 h is studied using scanning electron microscopy, and its chemical stability to an aqueous 3 M HCl solution is also studied. It is established that this glass has an interconnected phase-separated structure. The general nature of its leaching process is controlled by diffusion. Compared to iron-containing glass of a similar composition, the extraction rate of Na2O and B2O3 is reduced by a factor of 2. Nickel oxide is predominantly found in the chemically unstable glass phase, most of it passing into the leaching solution. The suitability of nickel-containing phase-separated glass for producing porous glass with through porosity (~30%) is demonstrated.