{"id":673,"date":"2021-06-08T08:05:17","date_gmt":"2021-06-08T06:05:17","guid":{"rendered":"https:\/\/funglass.eu\/ssc2021\/?p=673"},"modified":"2021-09-14T14:26:56","modified_gmt":"2021-09-14T12:26:56","slug":"biomaterials-svancarkova","status":"publish","type":"post","link":"https:\/\/funglass.eu\/ssc2021\/biomaterials-svancarkova\/","title":{"rendered":"P-07 Model Description of the Viscosity of Glass-Forming Chalcogenides"},"content":{"rendered":"<div id=\"call\"><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom: 0px;margin-top: 0px;border-width: 0px 0px 0px 0px;border-color:#eae9e9;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-one-full fusion-column-first fusion-column-last\" style=\"margin-top:0px;margin-bottom:0px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-1\" style=\"transform:translate3d(0,0,0);\"><h3 data-fontsize=\"20\" data-lineheight=\"30\">Topic: Chalcogenide, oxide, hydride materials<\/h3>\n<\/div><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"margin-left: auto;margin-right: auto;margin-top:10px;width:100%;\"><\/div><div class=\"fusion-sep-clear\"><\/div><ul class=\"fusion-checklist fusion-checklist-1\" style=\"font-size:14px;line-height:23.8px;\"><li class=\"fusion-li-item\"><span style=\"background-color:#00c9e2;font-size:12.32px;height:23.8px;width:23.8px;margin-right:9.8px;\" class=\"icon-wrapper circle-yes\"><i class=\"fusion-li-icon fa-female fas\" style=\"color:#ffffff;\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\" style=\"margin-left:33.6px;\">\n<p>Prof. Masaru ANIYA<\/p>\n<\/div><\/li><li class=\"fusion-li-item\"><span style=\"background-color:#00c9e2;font-size:12.32px;height:23.8px;width:23.8px;margin-right:9.8px;\" class=\"icon-wrapper circle-yes\"><i class=\"fusion-li-icon fa-university fas\" style=\"color:#ffffff;\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\" style=\"margin-left:33.6px;\">\n<p>Kumamoto University, Japan<\/p>\n<\/div><\/li><li class=\"fusion-li-item\"><span style=\"background-color:#00c9e2;font-size:12.32px;height:23.8px;width:23.8px;margin-right:9.8px;\" class=\"icon-wrapper circle-yes\"><i class=\"fusion-li-icon fa-graduation-cap fas\" style=\"color:#ffffff;\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\" style=\"margin-left:33.6px;\">\n<p>Department of Physics<\/p>\n<\/div><\/li><\/ul><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"margin-left: auto;margin-right: auto;margin-top:40px;width:100%;\"><\/div><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-text fusion-text-2\" style=\"transform:translate3d(0,0,0);\"><a href=\"https:\/\/funglass.eu\/ssc2021\/wp-content\/uploads\/2021\/06\/P-07_M.-Aniya_SSC2021_Model-Description-of-the-Viscosity-of-Glass-Forming-Chalcogenides.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">P-07_M. Aniya_SSC2021_Model Description of the Viscosity of Glass-Forming Chalcogenides<br\/><\/a>\n<\/div><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"margin-left: auto;margin-right: auto;margin-top:40px;width:100%;\"><\/div><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-text fusion-text-3\" style=\"transform:translate3d(0,0,0);\"><p><u>M. Aniya<sup>1*<\/sup><\/u>, M. Ikeda<sup>2<\/sup><\/p>\n<p><em><sup>1<\/sup><\/em><em> Department<\/em><em> of Physics, Faculty of Advanced Science and Technology, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, Japan;<\/em><\/p>\n<p><em><sup>2<\/sup><\/em> <em>Department <\/em><em>of General Education, National Institute of Technology, Oita College, 1666 Maki, Oaza, Oita 870-0152, Japan <\/em><\/p>\n<p><em><sup>*<\/sup><\/em> <em>E<\/em><em>-mail: <u>aniya@gpo.kumamoto-u.ac.jp<\/u><\/em><\/p>\n<p><strong>Keywords:<\/strong> viscosity, chalcogenide, glass, fragility, fragile-to-strong transition, BSCNF model<\/p>\n<p style=\"text-align: justify;\"><strong>Abstract:<\/strong> Understand the viscosity behaviour is of primordial importance in the processing of glass-forming materials. Concerning the temperature dependence of the viscosity, many theories and models have been proposed till now [1]. Some years ago, we proposed the Bond Strength-Coordination Number Fluctuation (BSCNF) model [2]. This model describes the temperature dependence of the viscosity or relaxation time in terms of the mean bond strength, mean coordination number and their fluctuations of the structural units that form the melt.<\/p>\n<p style=\"text-align: justify;\">Recently, the model was applied to describe the unusual temperature dependence of the viscosity of metallic glass-forming liquids [3]. These systems have the propensity that at high temperature the viscosity exhibits a very low activation energy, while at low temperature it exhibits an Arrhenius type behaviour. Interestingly, such kind of behaviour has been also observed in some type of chalcogenide systems [4]. Some authors discuss the unusual behaviour in connection with phase change materials and fragile-to-strong transition [4]. In order to understand better the nature of such behaviour, we analysed the temperature dependence of the viscosity of chalcogenide systems based on our BSCNF model. A part of the result is shown in the Figure. Here, the full lines denote the description based on the BSCNF model [3]. By comparing the result obtained in other systems enable us to discuss what could be the origin of the peculiar viscosity behaviour reported in some glass-forming systems.<\/p>\n<p><strong>References<\/strong><\/p>\n<p>[1] Ko\u0161t\u00e1l, P., Sh\u00e1n\u011blov\u00e1, J. &amp; M\u00e1lek, J. (2020). <em>Intern. Mater. Rev.<\/em> 65(2), 63-101.<\/p>\n<p>[2] Aniya, M. (2002).<em> J. Therm. Anal. Cal.<\/em> 69(3), 971-978.<\/p>\n<p>[3] Ikeda, M. &amp; Aniya, M. (2019). <em>J. Alloys Comp.<\/em> 805, 904-908.<\/p>\n<p>[4] Orava, J., Hewak, D. W., &amp; Greer, A. L. (2015). <em>Adv. Funct. Mater.<\/em> 25(30), 4851-4858.<\/p>\n<p><strong><em>Acknowledgments<\/em><\/strong><\/p>\n<p>This work was supported in part by JST CREST, Japan, JPMJCR1861 and JPMJCR18I2, and by JSPS KAKENHI No. 20K05080 and 20H02430.<\/p>\n<\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false},"categories":[7],"tags":[43,40,42,41,19,39],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>P-07 Model Description of the Viscosity of Glass-Forming Chalcogenides - SSC 2021 : Solid State Chemistry<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/funglass.eu\/ssc2021\/biomaterials-svancarkova\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P-07 Model Description of the Viscosity of Glass-Forming Chalcogenides - 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