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首页> 外文期刊>Journal of Solid State Chemistry >Processing and characterization of new oxy-sulfo-telluride glasses in the Ge-Sb-Te-S-O system
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Processing and characterization of new oxy-sulfo-telluride glasses in the Ge-Sb-Te-S-O system

机译：Ge-Sb-Te-S-O系统中新型硫代碲化物玻璃的加工和表征

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摘要

New oxy-sulfo-telluride glasses have been prepared in the GeSbTeSO system employing a two-step melting process which involves the processing of a chalcogenide glass (ChG) and subsequent melting with TeO_2 or Sb _2O_3. The progressive incorporation of O at the expense of S was found to increase the density and the glass transition temperature and to decrease the molar volume of the investigated oxy-sulfo-telluride glasses. We also observed a shift of the visNIR cut-off wavelength to longer wavelength probably due to changes in Sb coordination within the glass matrix and overall matrix polarizability. Using Raman spectroscopy, correlations have been shown between the formation of Ge- and Sb-based oxysulfide structural units and the S/O ratio. Lastly, two glasses with similar composition (Ge_(20)Sb _6S_(64)Te_3O_7) processed by melting the Ge_(23)Sb_7S_(70) glass with TeO_2 or the Ge_(23)Sb_2S_(72)Te_4 glass with Sb _2O_3 were found to have slightly different physical, thermal, optical and structural properties. These changes are thought to result mainly from the higher moisture content and sensitivity of the TeO_2 starting materials as compared to that of the Sb_2O_3.
机译：已经在GeSbTeSO系统中采用两步熔化工艺制备了新的氧-硫代碲化物玻璃，该工艺包括硫族化物玻璃（ChG）的加工以及随后与TeO_2或Sb _2O_3的熔化。发现以S为代价的O的逐步掺入增加了密度和玻璃化转变温度并降低了所研究的氧-硫代-碲化物玻璃的摩尔体积。我们还观察到visNIR截止波长向更长波长的偏移可能是由于玻璃基质中Sb配位的变化和整个基质的极化率。使用拉曼光谱法，已经显示出基于Ge和Sb的氧硫化物结构单元的形成与S / O比之间的相关性。最后，通过熔化具有TeO_2的Ge_（23）Sb_7S_（70）玻璃或具有Sb _2O_3的Ge_（23）Sb_2S_（72）Te_4玻璃加工而成的具有相似成分的两块玻璃（Ge_（20）Sb _6S_（64）Te_3O_7）被发现具有稍微不同的物理，热，光学和结构特性。认为这些变化主要是由于与Sb_2O_3相比，TeO_2原料的较高水分含量和敏感性。

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