A novel high-strength lithium disilicate glass-ceramic featuring a highly intertwined microstructure

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• 作者：Saifang Huang^a ; ^b ; ^{saifang.huang@auckland.ac.nz" class="auth_mail" title="E-mail the corresponding author} ; Ying Li^a ; Shanghai Wei^a ; Zhaohui Huang^b ; Wei Gao^a ; Peng Cao^a ; ^{p.cao@auckland.ac.nz" class="auth_mail" title="E-mail the corresponding author}
• 关键词：High strength ; Lithium disilicate glass-ceramic ; Crystallization ; Interlocking/intertwined microstructure ; Dental materials
• 刊名：Journal of the European Ceramic Society
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：37
• 期：3
• 页码：1083-1094
• 全文大小：7293 K

文摘

To achieve long-term clinical performance and wider application of glass-ceramic dental restorations, it is urged to enhance the mechanical properties of glass-ceramic materials. In this study, a high-strength lithium disilicate glass-ceramic was developed in a SiO₂–Li₂O–Al₂O₃–MgO–P₂O₅–ZrO₂ related glass system, which demonstrates a high flexural strength of 562 ± 107 MPa. In this high-strength glass-ceramic, the microstructure features highly intertwined colonies of lithium disilicate. This novel microstructure effectively contributes to the improvement of flexural strength. The minor crystalline phases (β-quartz, MgAl₂Si₄O₁₂, and Li₃PO₄) embedded within the Li₂Si₂O₅ (LS₂) crystal colonies and residual glass matrix could further strengthen the glass-ceramic. The development process of such a novel microstructure and its possible formation mechanism are proposed. This material could be an excellent candidate for restorative dental applications up to three-unit posterior bridges.