Mechanical properties and structural characterization of transparent 30BaO-15TiO2-55SiO2 glass-ceramics

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Glass-ceramics have many interesting properties such as excellent optical transparency, thermal shock resistance and good mechanical properties. They have thus been widely used in various practical applications. Glass-ceramics based on the BaO-TiO2-SiO2 (BTS) system have been extensively studied because of the excellent dielectric and nonlinear optical properties of fresnoite Ba2TiSi2O8.
§ Increasing the content of crystals in glass-ceramics can improve their mechanical properties, but this may reduce the light transmittance, so improving the mechanical properties of glass-ceramics while ensuring their transparency is the key challenge.
§ Here, we heat-treat the 30BaO-15TiO2-55SiO2 glass at 860°C for 2 h, 4 h, and 8 h. We observe the crystal morphology by SEM. The hardness, crack resistance (CR) and indentation toughness (KIc_INT) of glass-ceramics was measured by indentation method. Fracture toughness (KIc_SEPB) was also tested by single-edge precracked beam (SEPB) method. In addition, XRD and Raman spectroscopy were used to assist in the structural understanding of the observed mechanical properties.
Original languageEnglish
Publication date18 May 2022
Publication statusPublished - 18 May 2022


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