The process of phase formation in the synthesis of Al2O3 - Y2O3 - SiO2 frit by sol-gel and coprecipitation method

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Authors

  • Tran Van Cuong (Corresponding Author) Institute of Materials, Biology and Environment/Academy of Military Science and Technology
  • Ninh Duc Ha Institute of Materials, Biology and Environment/Academy of Military Science and Technology
  • Dang Quoc Khanh Hanoi University of Science and Technology
  • Nguyen Van Canh Institute of Materials, Biology and Environment/Academy of Military Science and Technology
  • Ho Ngoc Minh Institute of Materials, Biology and Environment/Academy of Military Science and Technology
  • Trieu Khuong Institute of Materials, Biology and Environment/Academy of Military Science and Technology
  • Nguyen Thi Hoa Institute of Materials, Biology and Environment/Academy of Military Science and Technology
  • Ngo Van Hoanh Institute of Materials, Biology and Environment/Academy of Military Science and Technology
  • Le Trung Hieu Institute of Materials, Biology and Environment/Academy of Military Science and Technology

DOI:

https://doi.org/10.54939/1859-1043.j.mst.104.2025.94-102

Keywords:

Y2O3 -Al2O3 -SiO2; Frit; Ceramics; SiAlON.

Abstract

Frits are utilized in various high-temperature and structural applications due to their exceptional properties. However, most frits are fabricated via solid-state reactions, which require high sintering temperatures and extended time to achieve homogeneity. Therefore, this study investigates the phase transition in the Al2O3 -Y2O3 -SiO2 frit using sol-gel method, which enables lower synthesis temperature and achieves higher purity. The energy dispersive X-ray spectroscopy (EDX) results confirm the successful fabrication of Al2O3 -Y2O3 -SiO2 frits. The effect of the sintering conditions on the phase transition was studied. The X-ray diffraction patterns revealed that the frit remained completely amorphous up to 1000 °C. Although the crystalline phases Y2O3·2SiO2, Y2O3·SiO2, and α-Al2O3 begin to appear around 1100 °C, the overall degree of crystallinity increases with temperature, indicating a gradual transformation from an amorphous to a more crystalline structure. A fully crystallized structure of the Al2O3 -Y2O3 -SiO2 frit is observed at 1400 oC. The differential thermal analysis (TGA) results confirm the glass transition, crystallization and eutectic temperature of the Al2O3 -Y2O3 -SiO2 frit. The optimized sintering condition was determined to be 1400 oC for 5 hours.

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Published

25-06-2025

How to Cite

[1]
C. Tran, “The process of phase formation in the synthesis of Al2O3 - Y2O3 - SiO2 frit by sol-gel and coprecipitation method”, JMST, vol. 104, no. 104, pp. 94–102, Jun. 2025.

Issue

Vol. 104 (2025)

Section

Chemistry, Biology & Environment

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