Novel ion-exchangeable nepheline glass-ceramics for dental application |
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| Affiliation: | 1. School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Key Laboratory of Novel Materials for Information Technology of Zhejiang Province, Zhejiang University, Hangzhou 310027, China;2. Institute of Advanced Magnetic Materials, College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310012, China;1. School of Material Science and Engineering, Zhengzhou University, Henan 450001, China;2. School of Material Science and Engineering, Luoyang Institute of Science and Technology, Henan 471023, China;3. State Key Laboratory of Advanced Refractories, Sinosteel Luoyang Institute of Refractories Research Co., Ltd., Henan 471039, China;1. Chair of Ceramic Materials Engineering (CME), University of Bayreuth, Prof.-Rüdiger-Bormann-Str. 1, 95447 Bayreuth, Germany;2. State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, Dalian University of Technology, No. 2 Linggong Road, 116024 Dalian, China;1. School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China;2. School of Textile Science and Engineering, Xi’an Polytechnic University, Xi’an, Shaanxi 710048, China;3. State Key Laboratory for Manufacturing System Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China |
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| Abstract: | Ion exchange of a glass-ceramic system with a specific crystalline phase can lead to materials with superior chemical, physical and mechanical properties. The aim of this study is to characterize newly synthesised nepheline glass-ceramics for dental restorative applications. Four novel experimental glasses based on the nepheline composition were ground into fine powders and then sinter-crystallized into monolithic glass-ceramics. The developed glass-ceramics were characterized before and after ion exchange in a potassium nitrate bath using X-ray diffraction, EDX-SEM, and biaxial flexural strength, hardness and solubility testing in accordance with ISO-6872. The ion exchange process of nepheline containing glass-ceramic Al20 increased the characteristic strength by more than 163 % compared to the starting value. The experimental glass-ceramics increased in strength after ion exchange compared to their as-sintered values by 139 %, 24 % and 123 %. The strength scatter decreased after ion exchange for the nepheline-containing glass-ceramics by 10 %. The characterised glass-ceramics in this work require further investigation and have the potential to be developed into layered glass powders, which can be ion exchanged after sinter-crystallization to produce dental restorations with superior mechanical and chemical properties. |
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| Keywords: | Nepheline Ion Exchange Glass Ceramics Dental Materials |
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