Effect of potassium and silver ion-exchange on the strengthening effect and properties of aluminosilicate glass |
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| Affiliation: | 1. School of Materials Science and Engineering, Central South University, Changsha, 410083, China;2. XiangYa Third Hospital, Central South University, Changsha, 410013, China;1. School of Materials Science and Engineering, South China University of Technology, Guangzhou, China;2. National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, China;3. Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou, 510006, China;1. Department of Physics, University of Lucknow, Lucknow, 226007, Uttar Pradesh, India;2. Department of Prosthodontics, King George Medical University, Shah Mina Road, Chowk, Lucknow, 226003, Uttar Pradesh, India;3. Department of Mechanical Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi, 221005, UP, India;1. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, 510006, China;2. School of Material Science and Energy Engineering, Foshan University, Foshan, 528000, China;3. The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China;4. Immobilisation Science Laboratory, Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, UK;5. Department of Radiochemistry, China Institute of Atomic Energy, Beijing, 102413, China;1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang, 110819, China;2. Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China;3. Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravskia cesta 9, SK-84536, Bratislava, Slovakia |
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| Abstract: | In this work, the aluminosilicate glass was subjected to ion-exchange using the KNO3-AgCl mixed molten salt in order to strengthen the glass while imparting antimicrobial properties. The concentration distribution of K+ ions and Ag+ ions of the ion-exchanged glasses was characterized by EDS, the effects of ion-exchange temperature (460-500 °C), ion-exchange time (0.5-3 h) and AgCl concentration (0–2.5 wt%) in the mixed molten salt on the strengthening effect and properties of the glass were investigated. The results showed that Ag+-Na+ ion-exchange, K+-Na+ ion-exchange existed simultaneously, and Ag+-Na+ ion-exchange occurred preferentially. Due to the presence of metallic silver, the appearance of the Ag+ ion-exchanged glass was light yellow and its transmittance showed a decrease. The surface compressive stress trended up and then down with increasing temperature and time because of the stress relaxation effect. The Vickers hardness of ion-exchanged glass increased by 15%, and the densities and chemical stability were also increased. Ions leaching experiments showed that the Ag+ ions release concentration of silver-loaded glass in aqueous environment can reach the bactericidal level. It has been shown that ion-exchange of glass in KNO3-AgCl mixed molten salts allowed the glass to be strengthened and incorporated with antimicrobial active ions, its chemical stability was improved, too. |
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| Keywords: | Aluminosilicate glass Ion-exchange Strengthening effect |
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