Scholarlink

<p>Glass containing zinc-lead boroselenate glasses with the formula 10ZnO–20PbO<sub>2</sub>-xB<sub>2</sub>O<sub>3</sub>–(70 − x)SeO<sub>2</sub> (where 10 ≤ x ≤ 60&#xa0;mol%) were prepared using the conventional melt quenching method. Several physical properties, including density and molar volume, were determined. Glass transition temperature (T<sub>g</sub>) was investigated using differential scanning calorimetry (DSC), revealing a decrease in T<sub>g</sub> from 347 to 426&#xa0;°C as the B<sub>2</sub>O<sub>3</sub> content increased. Optical absorption studies showed that as the SeO<sub>2</sub> content decreased, the cutoff wavelength increased while the optical band gap energy (<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11082_2024_7177_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="32" /> </InlineMediaObject> <EquationSource Format="TEX">\({E}_{opt}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>E</mi> <mrow> <mi mathvariant="italic">opt</mi> </mrow> </msub> </math></EquationSource> </InlineEquation>) and Urbach energy (<InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11082_2024_7177_Article_IEq2.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="30" /> </InlineMediaObject> <EquationSource Format="TEX">\({\Delta E}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi mathvariant="normal">Δ</mi> <mi>E</mi> </mrow> </math></EquationSource> </InlineEquation>) decreased. The <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11082_2024_7177_Article_IEq3.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="32" /> </InlineMediaObject> <EquationSource Format="TEX">\({E}_{opt}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>E</mi> <mrow> <mi mathvariant="italic">opt</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> values for these glasses ranged from 2.699 to 2.091&#xa0;eV, while ΔE values fell between 0.232 and 0.351&#xa0;eV. FTIR measurements revealed that SeO<sub>3</sub> tetragonal and SeO<sub>4</sub> pyramidal units, as well as BO<sub>3</sub> and BO<sub>4</sub> units, were present in the network structure of these glasses. Additionally, Raman spectra identified distinct structural units. The FTIR and Raman spectra did not show any specific SeO<sub>2</sub> absorption bands. However, the presence of SeO<sub>2</sub> in the glass matrix changed how PbO<sub>2</sub>, ZnO, and B<sub>2</sub>O<sub>3</sub> were absorbed.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of B2O3 on physical, thermal, optical and structural properties of zinc lead selenate glasses

  • 期刊论文

  • 发表日期：

    2025年1月22日

查看全文
  • Venkateshwarlu Kalsani,
  • Suresh Sripada

摘要

Glass containing zinc-lead boroselenate glasses with the formula 10ZnO–20PbO2-xB2O3–(70 − x)SeO2 (where 10 ≤ x ≤ 60 mol%) were prepared using the conventional melt quenching method. Several physical properties, including density and molar volume, were determined. Glass transition temperature (Tg) was investigated using differential scanning calorimetry (DSC), revealing a decrease in Tg from 347 to 426 °C as the B2O3 content increased. Optical absorption studies showed that as the SeO2 content decreased, the cutoff wavelength increased while the optical band gap energy ( \({E}_{opt}\) E opt ) and Urbach energy ( \({\Delta E}\) Δ E ) decreased. The \({E}_{opt}\) E opt values for these glasses ranged from 2.699 to 2.091 eV, while ΔE values fell between 0.232 and 0.351 eV. FTIR measurements revealed that SeO3 tetragonal and SeO4 pyramidal units, as well as BO3 and BO4 units, were present in the network structure of these glasses. Additionally, Raman spectra identified distinct structural units. The FTIR and Raman spectra did not show any specific SeO2 absorption bands. However, the presence of SeO2 in the glass matrix changed how PbO2, ZnO, and B2O3 were absorbed.