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<p>In this study, the Y<sub>2</sub>O<sub>3</sub> and Al<sub>2</sub>O<sub>3</sub> were synthesized via the co-precipitation route using Al(NO<sub>3</sub>)<sub>3</sub>.9H<sub>2</sub>O and Y(NO<sub>3</sub>)<sub>3</sub>.6H<sub>2</sub>O in an NH<sub>4</sub>OH solution. Meanwhile, SiO<sub>2</sub> was fabricated through the sol-gel method with Na<sub>2</sub>SiO<sub>3</sub> as the precursor and HCl as a catalyst. Y<sub>2</sub>O<sub>3</sub>, Al<sub>2</sub>O<sub>3</sub>, and SiO<sub>2</sub> were employed as raw materials to prepare Al<sub>2</sub>O<sub>3</sub> -Y<sub>2</sub>O<sub>3</sub> - SiO<sub>2</sub> (denoted as 2A3Y5S frit) through sintering process. X-ray diffraction (XRD), differential thermal analysis (DTA), and scanning electron microscopy (SEM) were utilized to investigate the phase transition, crystallization temperatures, and the effects of temperature and time on the phase formation and structural evolution of the 2A3Y5S frit. As a result, the optimal synthesis conditions were identified as calcination at 1150&#xa0;°C for 5&#xa0;h. The 2A3Y5S exhibited a completely amorphous structure at 950&#xa0;°C, with crystallization initiating between 1050&#xa0;°C and 1150&#xa0;°C.</p>

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The Effect of Synthesis Conditions on Phase of Al2O3 - Y2O3 - SiO2 Frit by sol-gel and Coprecipitation Method

  • 期刊论文

  • 发表日期：

    2025年8月11日

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  • Tran Van Cuong,
  • Ninh Duc Ha,
  • Dang Quoc Khanh,
  • Tran Nam Anh,
  • Trieu Khuong,
  • Ngo Van Hoanh,
  • Van-Duong Dao

摘要

In this study, the Y2O3 and Al2O3 were synthesized via the co-precipitation route using Al(NO3)3.9H2O and Y(NO3)3.6H2O in an NH4OH solution. Meanwhile, SiO2 was fabricated through the sol-gel method with Na2SiO3 as the precursor and HCl as a catalyst. Y2O3, Al2O3, and SiO2 were employed as raw materials to prepare Al2O3 -Y2O3 - SiO2 (denoted as 2A3Y5S frit) through sintering process. X-ray diffraction (XRD), differential thermal analysis (DTA), and scanning electron microscopy (SEM) were utilized to investigate the phase transition, crystallization temperatures, and the effects of temperature and time on the phase formation and structural evolution of the 2A3Y5S frit. As a result, the optimal synthesis conditions were identified as calcination at 1150 °C for 5 h. The 2A3Y5S exhibited a completely amorphous structure at 950 °C, with crystallization initiating between 1050 °C and 1150 °C.