Optimization of heat treatment program and effect of heat treatment on microstructure and flexural strength of micro-nano-Li2Si2O5 whisker-reinforced glass-ceramics
Lithium disilicate (Li2Si2O5, referred as LD) glass ceramics with unique aesthetic properties are ideal dental restorative materials. However, their applications are limited due to the lower flexural strength than polycrystalline ceramics. Herein, micro-nano-LD whiskers were utilized to facilitate t...
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Frontiers Media S.A.
2023-01-01
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Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2022.1096276/full |
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author | Wenli He Wenli He Chengliang Yao Chengliang Yao Zihan Zhao Cunren Rong Yanjie Zhang Bing Li Bing Li Xiuping Wu Xiuping Wu |
author_facet | Wenli He Wenli He Chengliang Yao Chengliang Yao Zihan Zhao Cunren Rong Yanjie Zhang Bing Li Bing Li Xiuping Wu Xiuping Wu |
author_sort | Wenli He |
collection | DOAJ |
description | Lithium disilicate (Li2Si2O5, referred as LD) glass ceramics with unique aesthetic properties are ideal dental restorative materials. However, their applications are limited due to the lower flexural strength than polycrystalline ceramics. Herein, micro-nano-LD whiskers were utilized to facilitate the formation of crystallization sites and further growth of crystals in SiO2-Li2O glasses during the heat treatment process. Meanwhile, an orthogonal experiment with four-factor three-level was designed, and the optimum heat treatment conditions for preparing LD glass-ceramics with excellent flexural strength were found. The order of influencing extent of heat treatment conditions is crystallization temperature > crystallization time > nucleation temperature > nucleation time. In addition, the crystallization behavior, phase formation, microstructure and flexural strength of glass were measured at different heat treatment temperatures. Remarkably, the optimal LD glass-ceramics sample has a strong flexural strength at 342 MPa, in which plentiful crystal grains with uniform and dense distribution are observed. These results indicate that micro-nano-LD whisker-reinforced glass-ceramics obtained by optimized heat treatment program offer a potential candidate for dental applications. |
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spelling | doaj.art-5cca51be327e462eb671b0a1d448d63a2023-01-10T18:47:32ZengFrontiers Media S.A.Frontiers in Materials2296-80162023-01-01910.3389/fmats.2022.10962761096276Optimization of heat treatment program and effect of heat treatment on microstructure and flexural strength of micro-nano-Li2Si2O5 whisker-reinforced glass-ceramicsWenli He0Wenli He1Chengliang Yao2Chengliang Yao3Zihan Zhao4Cunren Rong5Yanjie Zhang6Bing Li7Bing Li8Xiuping Wu9Xiuping Wu10Shanxi Medical University School and Hospital of Stomatology, Taiyuan, ChinaShanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, ChinaShanxi Medical University School and Hospital of Stomatology, Taiyuan, ChinaShanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, ChinaResearch Institute of Photonics, Dalian Polytechnic University, Dalian, ChinaResearch Institute of Photonics, Dalian Polytechnic University, Dalian, ChinaResearch Institute of Photonics, Dalian Polytechnic University, Dalian, ChinaShanxi Medical University School and Hospital of Stomatology, Taiyuan, ChinaShanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, ChinaShanxi Medical University School and Hospital of Stomatology, Taiyuan, ChinaShanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, ChinaLithium disilicate (Li2Si2O5, referred as LD) glass ceramics with unique aesthetic properties are ideal dental restorative materials. However, their applications are limited due to the lower flexural strength than polycrystalline ceramics. Herein, micro-nano-LD whiskers were utilized to facilitate the formation of crystallization sites and further growth of crystals in SiO2-Li2O glasses during the heat treatment process. Meanwhile, an orthogonal experiment with four-factor three-level was designed, and the optimum heat treatment conditions for preparing LD glass-ceramics with excellent flexural strength were found. The order of influencing extent of heat treatment conditions is crystallization temperature > crystallization time > nucleation temperature > nucleation time. In addition, the crystallization behavior, phase formation, microstructure and flexural strength of glass were measured at different heat treatment temperatures. Remarkably, the optimal LD glass-ceramics sample has a strong flexural strength at 342 MPa, in which plentiful crystal grains with uniform and dense distribution are observed. These results indicate that micro-nano-LD whisker-reinforced glass-ceramics obtained by optimized heat treatment program offer a potential candidate for dental applications.https://www.frontiersin.org/articles/10.3389/fmats.2022.1096276/fulllithium disilicateglass-ceramicswhiskerheat treatmentmicrostructureflexural strength |
spellingShingle | Wenli He Wenli He Chengliang Yao Chengliang Yao Zihan Zhao Cunren Rong Yanjie Zhang Bing Li Bing Li Xiuping Wu Xiuping Wu Optimization of heat treatment program and effect of heat treatment on microstructure and flexural strength of micro-nano-Li2Si2O5 whisker-reinforced glass-ceramics Frontiers in Materials lithium disilicate glass-ceramics whisker heat treatment microstructure flexural strength |
title | Optimization of heat treatment program and effect of heat treatment on microstructure and flexural strength of micro-nano-Li2Si2O5 whisker-reinforced glass-ceramics |
title_full | Optimization of heat treatment program and effect of heat treatment on microstructure and flexural strength of micro-nano-Li2Si2O5 whisker-reinforced glass-ceramics |
title_fullStr | Optimization of heat treatment program and effect of heat treatment on microstructure and flexural strength of micro-nano-Li2Si2O5 whisker-reinforced glass-ceramics |
title_full_unstemmed | Optimization of heat treatment program and effect of heat treatment on microstructure and flexural strength of micro-nano-Li2Si2O5 whisker-reinforced glass-ceramics |
title_short | Optimization of heat treatment program and effect of heat treatment on microstructure and flexural strength of micro-nano-Li2Si2O5 whisker-reinforced glass-ceramics |
title_sort | optimization of heat treatment program and effect of heat treatment on microstructure and flexural strength of micro nano li2si2o5 whisker reinforced glass ceramics |
topic | lithium disilicate glass-ceramics whisker heat treatment microstructure flexural strength |
url | https://www.frontiersin.org/articles/10.3389/fmats.2022.1096276/full |
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