研究目的
To compare the structural, polarizability, and optical properties of BiZnBo–SLS and PbZnBo–SLS glass systems synthesized from silica-based glass with varying concentrations of Bi2O3 and PbO.
研究成果
The addition of bismuth oxide improves structural and optical properties compared to lead oxide in silica-based glasses, making Bi2O3 a suitable non-toxic replacement for PbO in optoelectronic applications. Key findings include increased density, molar volume, refractive index, and polarizability with higher Bi2O3 and PbO concentrations, and decreased optical band gap and metallisation criterion, indicating insulating behavior.
研究不足
The study is limited to specific glass compositions and may not generalize to other systems. Errors in band gap and Urbach energy estimations due to extrapolation methods are noted, with potential inaccuracies. The focus is on structural and optical properties, without extensive testing for practical applications like radiation shielding or device integration.
1：Experimental Design and Method Selection:
The study used a melt-quenching method to prepare glass samples with compositions x [RmOn] (0.50?x) [ZnO] 0.20 [B2O3] 0.30 [SLS], where RmOn are Bi2O3 and PbO for x = 0.05 to 0.45 mol. Optical properties were analyzed using UV–visible absorption measurements, and structural properties were determined by X-ray diffraction (XRD).
2：50?x) [ZnO] 20 [B2O3] 30 [SLS], where RmOn are Bi2O3 and PbO for x = 05 to 45 mol. Optical properties were analyzed using UV–visible absorption measurements, and structural properties were determined by X-ray diffraction (XRD).
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Glass samples were fabricated from recycled SLS glass crushed into powder, with specific mole fractions of Bi2O3, PbO, ZnO, B2O3, and SLS as detailed in Table
3：List of Experimental Equipment and Materials:
Equipment includes an agate mortar for grinding, an alumina crucible, an electric furnace, a brass plate, an oven for annealing, and a UV–visible spectrophotometer for optical measurements. Materials include Bi2O3, PbO, ZnO, B2O3, and SLS.
4：Experimental Procedures and Operational Workflow:
Weigh and mix chemical compounds, grind for 10 minutes, melt in furnace at 1200°C for 1.5 hours, pour onto brass plate, anneal at 250°C for 1 hour, cool to room temperature, polish samples, measure density using Archimedes' principle with distilled water, perform XRD analysis, and conduct UV–visible absorption measurements in the range of 200–1100 nm.
5：5 hours, pour onto brass plate, anneal at 250°C for 1 hour, cool to room temperature, polish samples, measure density using Archimedes' principle with distilled water, perform XRD analysis, and conduct UV–visible absorption measurements in the range of 200–1100 nm.
Data Analysis Methods:
5. Data Analysis Methods: Density calculated from weights in air and water, molar volume from molecular weight and density, optical band gap from Tauc's plot using UV–visible data, refractive index from band gap relationship, and other parameters like polarizability and metallisation criterion using specified equations.
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