Abstract In this work, Bi2O3:Al2O3 thin films were prepared on a glass substrate by pulsed laser deposition (PLD) then thermally treated by annealing at temperatures 300, 400, and 500 °C. XRD analysis reveals that all films have a polycrystalline structure of Bi2Al4O9 with the presence of secondary phases of Bi2O3 and Al2O3, the degree of crystallinity increased with annealing temperature, we observed a significant decrease in crystallite size after annealing. SEM and AFM measurements show the films are homogeneous and free of voids and cracks with spherical nanoparticles and relatively high roughness. The optical characteristics show a redshift in the bandgap with increasing annealing temperature. Vickers micro-hardness increased with annealing temperature, the optimum condition is recorded in the films annealed at 500 °C where the highest micro-hardness is recorded and found to be comparable to those of soda-lime glass. These characteristics prove this composite is a promising material in the glass manufacturing process, optoelectronics, and smart windows.

中文翻译：

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Bi2O3:Al2O3 薄膜的纳米结构特征和退火温度对形态、光学和机械性能的影响

摘要 在这项工作中，通过脉冲激光沉积 (PLD) 在玻璃基板上制备了 Bi2O3:Al2O3 薄膜，然后通过在 300、400 和 500 °C 的温度下退火进行热处理。XRD 分析表明，所有薄膜均具有 Bi2Al4O9 多晶结构，存在 Bi2O3 和 Al2O3 次生相，结晶度随退火温度增加，我们观察到退火后微晶尺寸显着减小。SEM 和 AFM 测量表明，薄膜是均匀的，没有空隙和裂纹，具有球形纳米颗粒和相对较高的粗糙度。光学特性表明，随着退火温度的升高，带隙发生红移。维氏显微硬度随退火温度升高，最佳条件记录在在 500 °C 下退火的薄膜中，记录了最高的显微硬度，发现与钠钙玻璃的硬度相当。这些特性证明这种复合材料在玻璃制造工艺、光电和智能窗户方面是一种很有前途的材料。