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<p>Microcrystallization was undertaken in the 25La<sub>2</sub>O<sub>3</sub>-60Al<sub>2</sub>O<sub>3</sub>-15ZrO<sub>2</sub>:0.5 wt% Eu glass fabricated by <b>containerless gas suspension technique</b> via heat treatment. <b>Based on the</b> microcrystallization temperature determined by thermal analysis, the glass was heat-treated within 840 ℃-940 ℃. X-ray diffractometer, field-emission scanning electron microscope and Raman spectroscopy reveals the formation of glass-ceramics by heat treatment under different temperatures. Compared with the un-heated matrix glass, Vickers hardness (largest hardness of 9.52 GPa), fracture toughness (largest fracture toughness of 1.66 MPa·m<sup>1/2</sup>), refractive index (maximum refractive index value of 1.868), Abe number (larger than 36 for all glass-ceramics), and excitation and emission peak intensity are increased, and fluorescence lifetime is reduced for the glass-ceramics, in which the extremum values tend to appear, but do not present simple regular change with elevating the heat-treatment temperature. Such results prove that appropriate heat-treatment temperature can expand optical application of glass-ceramics and the 25La<sub>2</sub>O<sub>3</sub>-60Al<sub>2</sub>O<sub>3</sub>-15ZrO<sub>2</sub>:0.5 wt% Eu glass-ceramics exhibit prospect application potential in white-light-emitting diodes.</p>

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Microcrystallization and its effects on Eu2O3-doped LaO3/2-AlO3/2-ZrO2 glass prepared by containerless technique

  • 期刊论文

  • 发表日期：

    2026年2月16日

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  • Shaokang Zhao,
  • Bijun Fang,
  • Jianding Yu,
  • Qin Li,
  • Tianzhao Xu

摘要

Microcrystallization was undertaken in the 25La2O3-60Al2O3-15ZrO2:0.5 wt% Eu glass fabricated by containerless gas suspension technique via heat treatment. Based on the microcrystallization temperature determined by thermal analysis, the glass was heat-treated within 840 ℃-940 ℃. X-ray diffractometer, field-emission scanning electron microscope and Raman spectroscopy reveals the formation of glass-ceramics by heat treatment under different temperatures. Compared with the un-heated matrix glass, Vickers hardness (largest hardness of 9.52 GPa), fracture toughness (largest fracture toughness of 1.66 MPa·m1/2), refractive index (maximum refractive index value of 1.868), Abe number (larger than 36 for all glass-ceramics), and excitation and emission peak intensity are increased, and fluorescence lifetime is reduced for the glass-ceramics, in which the extremum values tend to appear, but do not present simple regular change with elevating the heat-treatment temperature. Such results prove that appropriate heat-treatment temperature can expand optical application of glass-ceramics and the 25La2O3-60Al2O3-15ZrO2:0.5 wt% Eu glass-ceramics exhibit prospect application potential in white-light-emitting diodes.