{"title":"Investigation of the substitution of mercury by silver in Ag2S-HgS-GeS2 glasses: Macroscopic, electrical and vibrational properties","authors":"","doi":"10.1016/j.jnoncrysol.2024.123207","DOIUrl":null,"url":null,"abstract":"<div><p>The evolution of structure and physical properties was investigated in the (Ag<sub>2</sub>S)<em><sub>x</sub></em>(HgS)<sub>50-</sub><em><sub>x</sub></em>(GeS<sub>2</sub>)<sub>50</sub> system. It was found that the density increases with increasing silver sulfide. The DSC data show a non-monotonic change of the glass transition temperature, <em>T</em><sub>g</sub>, from 243 °C (<em>x</em> = 0) to 301 °C (<em>x</em> = 50) with the minimum at 231 °C for <em>x</em> = 10 sample. The dual structure of HgS, which consists of the presence of dimorphic tetrahedral and chain forms of HgS, is found to be responsible for the non-monotonic change of the <em>T</em><sub>g</sub>. An increase in silver content leads to a significant enhancement of ionic conductivity from ∼10<sup>−14</sup> S.cm<sup>−1</sup> (<em>x</em> = 0) to ∼10<sup>−3</sup> S.cm<sup>−1</sup> (<em>x</em> = 50). The gradual structural evaluation is evidenced by the disappearance of the main Raman feature at ≈300 cm<sup>−1</sup> related to the Hg-S stretching and the emergence of two contributions for silver-rich glasses at ≈370 cm<sup>−1</sup> and at ≈400 cm<sup>−1</sup>.</p></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":null,"pages":null},"PeriodicalIF":3.2000,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Non-crystalline Solids","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022309324003843","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
引用次数: 0
Abstract
The evolution of structure and physical properties was investigated in the (Ag2S)x(HgS)50-x(GeS2)50 system. It was found that the density increases with increasing silver sulfide. The DSC data show a non-monotonic change of the glass transition temperature, Tg, from 243 °C (x = 0) to 301 °C (x = 50) with the minimum at 231 °C for x = 10 sample. The dual structure of HgS, which consists of the presence of dimorphic tetrahedral and chain forms of HgS, is found to be responsible for the non-monotonic change of the Tg. An increase in silver content leads to a significant enhancement of ionic conductivity from ∼10−14 S.cm−1 (x = 0) to ∼10−3 S.cm−1 (x = 50). The gradual structural evaluation is evidenced by the disappearance of the main Raman feature at ≈300 cm−1 related to the Hg-S stretching and the emergence of two contributions for silver-rich glasses at ≈370 cm−1 and at ≈400 cm−1.
期刊介绍:
The Journal of Non-Crystalline Solids publishes review articles, research papers, and Letters to the Editor on amorphous and glassy materials, including inorganic, organic, polymeric, hybrid and metallic systems. Papers on partially glassy materials, such as glass-ceramics and glass-matrix composites, and papers involving the liquid state are also included in so far as the properties of the liquid are relevant for the formation of the solid.
In all cases the papers must demonstrate both novelty and importance to the field, by way of significant advances in understanding or application of non-crystalline solids; in the case of Letters, a compelling case must also be made for expedited handling.