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Sintering properties of sol–gel derived lithium disilicate glass ceramics

  • Original Paper: Sol–gel and hybrid materials for biological and health (medical) applications
  • Published:
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Abstract

Lithium disilicate (Li2Si2O5) glass-ceramics were fabricated through two sol–gel methods: the nitrate route and the alkoxide route. Thermal analysis revealed different crystallization processing of two gel-derived powders. Li2Si2O5 powders were obtained after heat treatment at 800 °C. These powders were pressed and pressureless sintered under 900–1030 °C. Microstructure of sintered samples revealed the grain size and morphology of Li2Si2O5 ceramics. Although grain size in both samples increased with increasing sintering temperature, samples from the alkoxide route derived powders had more uniform grain size and pore distribution. In addition, open porosity decreased in both samples with increasing sintering temperature. Unlike familiar nucleation that resulted in grain growth mechanism, the Li2Si2O5 particles developed into irregular large size grains at first, and then grew into rod-shaped grains.

Highlights

  • Lithium disilicate glass-ceramics were fabricated through two sol-gel methods.

  • New grain growth mechanism of rodlike Li2Si2O5 grains was illustrated.

  • Sintering property of sol-gel derived Li2Si2O5 is more like that of ceramics.

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Acknowledgements

The work was financially supported by Shanghai Committee of Science and Technology, China (17441904100).

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Authors and Affiliations

  1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China

    Feng Wang, Ke Li & Congqin Ning

  2. Department of Structural Engineering, NTNU Nanomechanical Lab, Norwegian University of Science and Technology (NTNU), Trondheim, 7491, Norway

    Feng Wang

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  1. Feng Wang
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  2. Ke Li
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Correspondence to Congqin Ning.

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Wang, F., Li, K. & Ning, C. Sintering properties of sol–gel derived lithium disilicate glass ceramics. J Sol-Gel Sci Technol 87, 372–379 (2018). https://doi.org/10.1007/s10971-018-4738-3

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  • DOI: https://doi.org/10.1007/s10971-018-4738-3

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