研究目的
Investigating the polymorphism of sodium borovanadate glass through Raman spectroscopy and understanding its structural changes upon doping with vanadium oxide and thermal treatment.
研究成果
The study successfully identified the polymorphism in sodium borovanadate glasses through Raman spectroscopy, revealing the presence of α-NaVO3 crystals on the surface of doped samples before polishing. After polishing, the spectra characteristic of glasses were observed. Devitrification at 750°C led to the formation of β-NaVO3 crystalline phase, as confirmed by Raman scattering. The findings contribute to the understanding of structural changes in borovanadate glasses upon doping and thermal treatment.
研究不足
The study is limited to the analysis of sodium borovanadate glasses with V2O5 concentrations up to 20 mole%. The effects of higher doping concentrations or different cooling rates were not explored. The identification of crystalline phases relies heavily on Raman and XRD data, which may not capture all structural nuances.
1：Experimental Design and Method Selection:
The study involved the preparation of sodium borovanadate glass samples with varying concentrations of V2O5 using the splat cooling technique. Raman spectroscopy was employed to analyze the structural properties of both doped and undoped samples before and after polishing. Thermal treatments were applied to study devitrification.
2：Sample Selection and Data Sources:
Samples were prepared with Na2B4O7.10H2O and V2O5 concentrations ranging from 0 to 20 mole%. Raman spectra were collected for each sample.
3：10H2O and V2O5 concentrations ranging from 0 to 20 mole%. Raman spectra were collected for each sample.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: A Renishaw RM 1000 Raman spectrophotometer with a 514 nm argon laser line was used for Raman measurements. Samples were polished to remove surface crystallization.
4：Experimental Procedures and Operational Workflow:
Samples were heated to 1000°C for 1 hour, then rapidly cooled. Raman spectra were recorded before and after polishing. Thermal treatments at 750°C were conducted to induce devitrification.
5：Data Analysis Methods:
Raman spectra were analyzed to identify crystalline phases and structural changes in the glass samples. XRD was used to confirm the crystalline phases post-devitrification.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
