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Abstract <p>The optical, mechanical, and conductive properties of the Pb<sub>0.5</sub>Cd<sub>0.25</sub>Lu<sub>0.25</sub>F<sub>2.25</sub> crystal host have been studied for the first time in comparison with the crystals of the initial single-component fluorides. The&#xa0;short-wavelength transparency cut-off of the three-component mixed crystal is determined by the presence of PbF<sub>2</sub> in its composition; the IR limit is naturally shifted to 15 µm due to the presence of LuF<sub>3</sub> in the composition. The refractive index of the studied solid solution, <i>n</i>&#xa0;= 1.6889 at the wavelength λ&#xa0;= 0.6328 µm, is lower than that of the PbF<sub>2</sub> crystal due to the introduction of less polarizable components CdF<sub>2</sub> and LuF<sub>3</sub>. Significant hardening is observed for the three-component crystal: the microhardness <i>H</i><sub>V</sub>&#xa0;= 2.5 GPa, which exceeds the hardness values for PbF<sub>2</sub> and CdF<sub>2</sub> by almost 40%. The electrical conductivity σ<sub>dc</sub> of Pb<sub>0.5</sub>Cd<sub>0.25</sub>Lu<sub>0.25</sub>F<sub>2.25</sub> at 500 K is 5.5&#xa0;× 10<sup>−5</sup> S/cm, which corresponds to the conductivity level of solid solutions <i>M</i><InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11445_2025_8133_Article_IEq1.gif" Format="GIF" Height="11" Rendition="HTML" Resolution="72" Type="Linedraw" Width="25" /> </InlineMediaObject> <EquationSource Format="TEX">\(_{{1 - x}}\)</EquationSource> <!--Cryst2460212Buchinskaya-m1--> </InlineEquation>Lu<sub><i>x</i></sub>F<InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11445_2025_8133_Article_IEq2.gif" Format="GIF" Height="11" Rendition="HTML" Resolution="72" Type="Linedraw" Width="25" /> </InlineMediaObject> <EquationSource Format="TEX">\(_{{2 + x}}\)</EquationSource> <!--Cryst2460212Buchinskaya-m2--> </InlineEquation> (<i>M</i>&#xa0;= Ca, Sr, Ba). The studied multicomponent fluoride material can be a promising crystal medium for various photonic applications.</p>

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Study of Pb0.5Cd0.25Lu0.25F2.25 Fluorite Solid Solution with Congruent Melting Nature

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • I. I. Buchinskaya,
  • M. V. Koldaeva,
  • N. I. Sorokin,
  • A. G. Kulikov,
  • D. N. Karimov

摘要

Abstract

The optical, mechanical, and conductive properties of the Pb0.5Cd0.25Lu0.25F2.25 crystal host have been studied for the first time in comparison with the crystals of the initial single-component fluorides. The short-wavelength transparency cut-off of the three-component mixed crystal is determined by the presence of PbF2 in its composition; the IR limit is naturally shifted to 15 µm due to the presence of LuF3 in the composition. The refractive index of the studied solid solution, n = 1.6889 at the wavelength λ = 0.6328 µm, is lower than that of the PbF2 crystal due to the introduction of less polarizable components CdF2 and LuF3. Significant hardening is observed for the three-component crystal: the microhardness HV = 2.5 GPa, which exceeds the hardness values for PbF2 and CdF2 by almost 40%. The electrical conductivity σdc of Pb0.5Cd0.25Lu0.25F2.25 at 500 K is 5.5 × 10−5 S/cm, which corresponds to the conductivity level of solid solutions M \(_{{1 - x}}\) LuxF \(_{{2 + x}}\) (M = Ca, Sr, Ba). The studied multicomponent fluoride material can be a promising crystal medium for various photonic applications.