{"id":1449,"date":"2022-12-07T09:18:48","date_gmt":"2022-12-07T07:18:48","guid":{"rendered":"https:\/\/www.micronanotech.ro\/?p=1449"},"modified":"2024-04-01T13:05:50","modified_gmt":"2024-04-01T10:05:50","slug":"oxide-perovskites-designed-by-configurational-entropy","status":"publish","type":"post","link":"https:\/\/www.micronanotech.ro\/en\/oxide-perovskites-designed-by-configurational-entropy\/","title":{"rendered":"Oxide perovskites designed by configurational entropy"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column][\/vc_column][\/vc_row][vc_row equal_height=&#8221;yes&#8221;][vc_column offset=&#8221;vc_col-md-8&#8243;][vc_single_image image=&#8221;665&#8243; img_size=&#8221;full&#8221;][\/vc_column][vc_column css=&#8221;.vc_custom_1605772046492{padding-top: 15px !important;background-color: #f3fbfe !important;}&#8221; offset=&#8221;vc_col-md-4&#8243;]<style>.porto-info-listf4327c02baeb14e50db6da5ea25e50c3 i { color: #1ab7ea;font-size: 20px; }<\/style><ul class=\"porto-info-list  porto-info-listf4327c02baeb14e50db6da5ea25e50c3 wpb_custom_0245a87303d849201cd886c7f565cc53\"><li class=\"porto-info-list-item  wpb_custom_eade0171093a7591372ccf9372738e3d\"><i class=\"porto-info-icon Simple-Line-Icons-grid\"><\/i><div class=\"porto-info-list-item-desc\"><strong>Acronym: EntroPer<\/strong><\/div><\/li><li class=\"porto-info-list-item  wpb_custom_eade0171093a7591372ccf9372738e3d\"><i class=\"porto-info-icon Simple-Line-Icons-tag\"><\/i><div class=\"porto-info-list-item-desc\"><strong>Project Code:<\/strong> PN-III-P1-1.1-PD-2021-0625<\/div><\/li><li class=\"porto-info-list-item  wpb_custom_eade0171093a7591372ccf9372738e3d\"><i class=\"porto-info-icon Simple-Line-Icons-note\"><\/i><div class=\"porto-info-list-item-desc\"><strong>Contract Number: <\/strong>22PD<\/div><\/li><li class=\"porto-info-list-item  wpb_custom_eade0171093a7591372ccf9372738e3d\"><i class=\"porto-info-icon Simple-Line-Icons-calendar\"><\/i><div class=\"porto-info-list-item-desc\"><strong>Start:<\/strong> 01\/04\/2022<br \/>\n<strong>End:\u00a0 <\/strong>31\/03\/2024<\/div><\/li><li class=\"porto-info-list-item  wpb_custom_eade0171093a7591372ccf9372738e3d\"><i class=\"porto-info-icon Simple-Line-Icons-hourglass\"><\/i><div class=\"porto-info-list-item-desc\"><strong>Duration:<\/strong> 24 months<\/div><\/li><li class=\"porto-info-list-item  wpb_custom_eade0171093a7591372ccf9372738e3d\"><i class=\"porto-info-icon Simple-Line-Icons-wallet\"><\/i><div class=\"porto-info-list-item-desc\"><strong>Budget:<\/strong> 249.996,00 Lei<\/div><\/li><li class=\"porto-info-list-item  wpb_custom_eade0171093a7591372ccf9372738e3d\"><i class=\"porto-info-icon Simple-Line-Icons-user\"><\/i><div class=\"porto-info-list-item-desc\"><strong>Contracting Agency::<\/strong> <a href=\"https:\/\/uefiscdi.gov.ro\/\" target=\"_blank\" rel=\"noopener noreferrer\">Executive Agency for Higher Education, Research, Development and Innovation Funding<\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1251\" src=\"https:\/\/www.micronanotech.ro\/wp-content\/uploads\/2022\/07\/image003.png\" alt=\"\" width=\"202\" height=\"117\" \/><\/div><\/li><li class=\"porto-info-list-item  wpb_custom_eade0171093a7591372ccf9372738e3d\"><i class=\"porto-info-icon Simple-Line-Icons-home\"><\/i><div class=\"porto-info-list-item-desc\"><strong>Coordinating Institution:<\/strong> : University POLITEHNICA of Bucharest \u2013 National Research Center for Micro and Nanomaterials<\/p>\n<p>Address: Spl. Independentei 313, Sector 6, Bucharest, Romania<br \/>\nPhone: +4021.402.9465<\/div><\/li><\/ul>[\/vc_column][\/vc_row][vc_row el_class=&#8221;padding-65&#8243;][vc_column][vc_tabs type=&#8221;tabs-simple&#8221; icon_style=&#8221;featured-boxes-style-6&#8243; icon_effect=&#8221;featured-box-effect-6&#8243;][vc_tab show_icon=&#8221;yes&#8221; icon_type=&#8221;simpleline&#8221; icon_simpleline=&#8221;Simple-Line-Icons-people&#8221; title=&#8221;Project Team&#8221; tab_id=&#8221;7224df3a-ec68-8&#8243;][vc_row_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;614&#8243; img_size=&#8221;full&#8221; css=&#8221;.vc_custom_1605772093012{margin-bottom: 35px !important;}&#8221;][\/vc_column_inner][vc_column_inner el_class=&#8221;echipa&#8221; width=&#8221;1\/2&#8243;][vc_column_text]<strong>Project manager:<\/strong> Lect. Dr. Eng. Vasile-Adrian SURDU<\/p>\n<p><strong>Supervisor:<\/strong> Prof. Dr. Eng. Adelina Carmen IANCULESCU[\/vc_column_text][vc_separator][\/vc_column_inner][\/vc_row_inner][\/vc_tab][vc_tab show_icon=&#8221;yes&#8221; icon_type=&#8221;simpleline&#8221; icon_simpleline=&#8221;Simple-Line-Icons-target&#8221; title=&#8221;Project objective&#8221; tab_id=&#8221;1604406200212-2-10&#8243;][vc_column_text el_class=&#8221;justify&#8221;]The concrete objective of the project is to contribute to the fundamental understanding of the role of long-order and short-order interactions in the phenomenology of relaxor-ferroelectric behavior. This will be realized by inducing chemical disorder in oxide systems, by entropy-driven stabilization on A and\/or B-site of ABO3 perovskite structure. \u00a0The main objective is ambitious considering the complexity of the proposed compositions with 5 cations on an equivalent crystallographic site of ABO<sub>3<\/sub> perovskite structure, and potential difficulties in preparing single-phase ceramics. The approach of the project is experimental and multidisciplinary and involves activities of powders preparation by wet-chemistry Pechini method, elaboration of ceramics by alternative sintering strategies (conventional sintering and Spark Plasma Sintering) and complex investigation of the composition, structure, microstructure as well as functional properties (relative permittivity, dielectric losses). The successful achievement of the objective may open a way to new design strategy and understanding of the chemical disorder influence and microstructural design on electrical behavior for perovskite oxide relaxors.[\/vc_column_text][\/vc_tab][vc_tab show_icon=&#8221;yes&#8221; icon_type=&#8221;simpleline&#8221; icon_simpleline=&#8221;Simple-Line-Icons-notebook&#8221; title=&#8221;Work plan&#8221; tab_id=&#8221;1604407317768-4-4&#8243;][vc_row_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;599&#8243; img_size=&#8221;full&#8221; css=&#8221;.vc_custom_1605772137580{margin-bottom: 35px !important;}&#8221;][\/vc_column_inner][vc_column_inner width=&#8221;1\/2&#8243;]<div class=\"porto-toggles wpb_content_element \" data-view=\"one-toggle\">[vc_toggle title=&#8221;Phase 1. Elucidate the influence of A-site high configurational entropy in (Bi0.2K0.2Ba0.2Sr0.2Ca0.2)TiO3 powders and related ceramics on structure, microstructure and functional properties&#8221;][\/vc_toggle][vc_toggle title=&#8221;Phase 2. Establishing the influence of B-site high configurational entropy in Ba(Ti0.2Sn0.2Hf0.2Zr0.2Ce0.2)O3 with relaxor-ferroelectric behavior&#8221;][\/vc_toggle][vc_toggle title=&#8221;Phase 3. Design A and B-site high configurational entropy in (Bi0.2K0.2Ba0.2Sr0.2Ca0.2)(Ti0.2Sn0.2Hf0.2Zr0.2Ce0.2)O3 powders and related ceramics and discuss the functional properties of perovskite with chemical disorder&#8221;][\/vc_toggle]<\/div>[\/vc_column_inner][\/vc_row_inner][\/vc_tab][vc_tab show_icon=&#8221;yes&#8221; icon_type=&#8221;simpleline&#8221; icon_simpleline=&#8221;Simple-Line-Icons-pencil&#8221; title=&#8221;Estimated results&#8221; tab_id=&#8221;1605536201272-3-1&#8243;][vc_column_text]The estimated scientific results of the project are summarized in two points:<br \/>\n(i) Understanding of the chemical disorder contribution to functional properties of and domain wall formation in relaxors with high configurational entropy on A-site, B-site or both cationic sites of the perovskite structure. Result indicators such as permittivity, dielectric constant, dielectric loss values, ferroelectric domain walls characteristics will be assessed to relative to typical perovskite relaxors.<br \/>\n(ii) Understanding of the composition \u2013 structure \u2013 microstructure \u2013 functional properties relation in high entropy perovskites. The results indicators are the distortion of the perovskite structure for high entropy oxides, grain size, grain boundary density assessed relative to permittivity, dielectric constant and dielectric loss values.<\/p>\n<p><strong><u>Scientific results and dissemination<\/u><\/strong><\/p>\n<p><strong><u>\u00a0<\/u><\/strong><\/p>\n<p><strong><u>Phase 1<\/u><\/strong><\/p>\n<p><strong><u>\u00a0<\/u><\/strong><\/p>\n<p>Research activities were carried out for the synthesis of powders of nominal composition (Bi<sub>0.2<\/sub>K<sub>0.2<\/sub>Ba<sub>0.2<\/sub>Sr<sub>0.2<\/sub>Ca<sub>0.2<\/sub>)TiO<sub>3<\/sub> by wet chemical methods. The composition, thermal stability and morphology of the obtained nanoparticles were investigated. It was found that processing at temperatures between 900 and 1000\u00b0C leads to obtaining the desired composition, in a mixture of polymorphic phases specific to the perovskite-type structure and with particle sizes of approximately 10-16 nm. The consolidation of the powder carried out by alternative methods allowed the consolidation of ceramic materials with an average granular size in the range of 17-50 nm depending on the sintering route and the processing temperature and with a uniform distribution of chemical elements in the case of ceramics processed by conventional sintering. The dielectric behaviour of the obtained ceramic materials suggests a relaxor-type behaviour, with a permittivity maximum at temperatures dependent on the frequency and the granular size of the studied ceramics.<\/p>\n<p>The dissemination of the results was achieved by participating with an oral presentation entitled &#8220;High entropy perovskites oxides: synthesis and characterization&#8221;, authors Vasile-Adrian Surdu, Mariana Andreea Marinic\u0103, Ovidiu Oprea, Adelina Carmen Ianculescu at the &#8220;22nd Romanian International Conference on Chemistry and Chemical Engineering&#8221;, September 7-9, 2022, which took place in Sinaia, Romania.<\/p>\n<p><strong><u>\u00a0<\/u><\/strong><\/p>\n<p><strong><u>Phase 2<\/u><\/strong><\/p>\n<p><strong><u>\u00a0<\/u><\/strong><\/p>\n<p>Research activities were carried out for the synthesis of powders of nominal composition Ba(Ti<sub>0.2<\/sub>Sn<sub>0.2<\/sub>Hf<sub>0.2<\/sub>Zr<sub>0.2<\/sub>Ce<sub>0.2<\/sub>)O<sub>3<\/sub> and (Bi<sub>0.2<\/sub>K<sub>0.2<\/sub>Ba<sub>0.2<\/sub>Sr<sub>0.2<\/sub>Ca<sub>0.2<\/sub>)(Ti<sub>0.2<\/sub>Sn<sub>0.2<\/sub>Hf<sub>0.2<\/sub>Zr<sub>0.2<\/sub>Ce<sub>0.2<\/sub>)O<sub>3<\/sub> by wet chemical methods. The composition, thermal stability and morphology of the obtained nanoparticles were investigated. Thermal processing conditions were determined to obtain the perovskite phase of interest in an optimal proportion for each of the compositions. Powder consolidation carried out by alternative methods allowed the consolidation of ceramic materials with controllable average granular size depending on the sintering route and the processing temperature and with a uniform distribution of chemical elements. For the ceramic materials of nominal composition Ba(Ti<sub>0.2<\/sub>Sn<sub>0.2<\/sub>Hf<sub>0.2<\/sub>Zr<sub>0.2<\/sub>Ce<sub>0.2<\/sub>)O<sub>3<\/sub> the dielectric behavior was investigated and was correlated with the microstructure of the investigated materials.<\/p>\n<p>The dissemination of the results was achieved by publishing the article Surdu, V.-A.; Marinic\u0103, M.-A.; Patru, R.-E.; Oprea, O.-C.; Nicoara, A.I.; Vasile, B.\u0218.; Tru\u0219ca, R.; Ianculescu, A.-C. High-Entropy Lead-Free Perovskite Bi<sub>0.2<\/sub>K<sub>0.2<\/sub>Ba<sub>0.2<\/sub>Sr<sub>0.2<\/sub>Ca<sub>0.2<\/sub>TiO<sub>3<\/sub> Powders and Related Ceramics: Synthesis, Processing, and Electrical Properties. Nanomaterials 2023, 13, 2974. https:\/\/doi.org\/10.3390\/nano13222974 and by participating in an oral presentation entitled &#8220;High entropy perovskite ceramics prepared by alternative routes&#8221;, authors Surdu Vasile-Adrian, Nicoar\u0103 Adrian Ionu\u021b, P\u0103tru Roxana Elena , Tru\u0219ca Roxana, Oprea Ovidiu, Ianculescu Adelina Carmen at the &#8220;The XVIIIth Conference of the European Ceramic Society&#8221;, July 2-6, 2023, which took place in Lyon, France.<\/p>\n<p><strong><u>\u00a0<\/u><\/strong><\/p>\n<p><strong><u>Phase 3<\/u><\/strong><\/p>\n<p><strong><u>\u00a0<\/u><\/strong><\/p>\n<p>Research activities were carried out for the characterization of powders and ceramic materials of nominal composition (Bi<sub>0.2<\/sub>K<sub>0.2<\/sub>Ba<sub>0.2<\/sub>Sr<sub>0.2<\/sub>Ca<sub>0.2<\/sub>)(Ti<sub>0.2<\/sub>Sn<sub>0.2<\/sub>Hf<sub>0.2<\/sub>Zr<sub>0.2<\/sub>Ce<sub>0.2<\/sub>)O<sub>3<\/sub>. The structure, particle morphology and chemical homogeneity of the powders were investigated. Powder consolidation carried out by alternative methods allowed the obtaining of ceramic materials with controlled grain size, depending on the processing route and conditions and with an uniform distribution of chemical elements. The dielectric behavior was investigated and correlated with the microstructure of the investigated materials.<\/p>\n<p>The dissemination of the results was achieved by participating with an oral presentation entitled &#8220;High entropy lead-free perovskite powders and related ceramics&#8221;, authors Vasile-Adrian Surdu, Mariana-Andreea Marinic\u0103, Roxana-Elena P\u0103tru, Ovidiu Oprea, Adrian Ionu\u021b Nicoar\u0103, Bogdan \u0218tefan Vasile, Roxana Doina Tru\u0219c\u0103, Adelina Carmen Ianculescu at the conference &#8220;13TH INTERNATIONAL CONFERENCE ON MATERIALS SCIENCE &amp; ENGINEERING&#8221;, March 13-16, 2024, which took place in Bra\u0219ov, Romania.[\/vc_column_text][\/vc_tab][vc_tab show_icon=&#8221;yes&#8221; title=&#8221;Disemination&#8221; tab_id=&#8221;1607278745243-4-8&#8243; icon=&#8221;fas fa-globe&#8221;][vc_column_text]Article:<\/p>\n<ol>\n<li>Surdu, V.-A.; Marinic\u0103, M.-A.; Patru, R.-E.; Oprea, O.-C.; Nicoara, A.I.; Vasile, B.\u0218.; Tru\u0219ca, R.; Ianculescu, A.-C. High-Entropy Lead-Free Perovskite Bi<sub>0.2<\/sub>K<sub>0.2<\/sub>Ba<sub>0.2<\/sub>Sr<sub>0.2<\/sub>Ca<sub>0.2<\/sub>TiO<sub>3<\/sub> Powders and Related Ceramics: Synthesis, Processing, and Electrical Properties. Nanomaterials 2023, 13, 2974. https:\/\/doi.org\/10.3390\/nano13222974<\/li>\n<\/ol>\n<p>Conference:<\/p>\n<ol>\n<li>&#8220;High entropy perovskite ceramics prepared by alternative routes&#8221;, authors Surdu Vasile-Adrian, Nicoar\u0103 Adrian Ionu\u021b, P\u0103tru Roxana Elena , Tru\u0219ca Roxana, Oprea Ovidiu, Ianculescu Adelina Carmen at the &#8220;The XVIIIth Conference of the European Ceramic Society&#8221;, July 2-6, 2023, which took place in Lyon, France.<\/li>\n<li>&#8220;High entropy perovskites oxides: synthesis and characterization&#8221;, authors Vasile-Adrian Surdu, Mariana Andreea Marinic\u0103, Ovidiu Oprea, Adelina Carmen Ianculescu at the &#8220;22nd Romanian International Conference on Chemistry and Chemical Engineering&#8221;, September 7-9, 2022, which took place in Sinaia, Romania.<\/li>\n<li>&#8220;High entropy lead-free perovskite powders and related ceramics&#8221;, authors Vasile-Adrian Surdu, Mariana-Andreea Marinic\u0103, Roxana-Elena P\u0103tru, Ovidiu Oprea, Adrian Ionu\u021b Nicoar\u0103, Bogdan \u0218tefan Vasile, Roxana Doina Tru\u0219c\u0103, Adelina Carmen Ianculescu at the conference &#8220;13TH INTERNATIONAL CONFERENCE ON MATERIALS SCIENCE &amp; ENGINEERING&#8221;, March 13-16, 2024, which took place in Bra\u0219ov, Romania.<\/li>\n<\/ol>\n<p>[\/vc_column_text][\/vc_tab][\/vc_tabs][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][\/vc_column][\/vc_row][vc_row equal_height=&#8221;yes&#8221;][vc_column offset=&#8221;vc_col-md-8&#8243;][vc_single_image image=&#8221;665&#8243; img_size=&#8221;full&#8221;][\/vc_column][vc_column css=&#8221;.vc_custom_1605772046492{padding-top: 15px !important;background-color: #f3fbfe !important;}&#8221; offset=&#8221;vc_col-md-4&#8243;][\/vc_column][\/vc_row][vc_row el_class=&#8221;padding-65&#8243;][vc_column][vc_tabs type=&#8221;tabs-simple&#8221; icon_style=&#8221;featured-boxes-style-6&#8243; icon_effect=&#8221;featured-box-effect-6&#8243;][vc_tab show_icon=&#8221;yes&#8221; icon_type=&#8221;simpleline&#8221; icon_simpleline=&#8221;Simple-Line-Icons-people&#8221; title=&#8221;Project Team&#8221; tab_id=&#8221;7224df3a-ec68-8&#8243;][vc_row_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;614&#8243; img_size=&#8221;full&#8221; css=&#8221;.vc_custom_1605772093012{margin-bottom: 35px !important;}&#8221;][\/vc_column_inner][vc_column_inner el_class=&#8221;echipa&#8221; width=&#8221;1\/2&#8243;][vc_column_text]Project manager: Lect. Dr. Eng. Vasile-Adrian SURDU Supervisor: Prof. Dr. Eng. Adelina Carmen IANCULESCU[\/vc_column_text][vc_separator][\/vc_column_inner][\/vc_row_inner][\/vc_tab][vc_tab show_icon=&#8221;yes&#8221; icon_type=&#8221;simpleline&#8221; icon_simpleline=&#8221;Simple-Line-Icons-target&#8221; title=&#8221;Project objective&#8221; tab_id=&#8221;1604406200212-2-10&#8243;][vc_column_text el_class=&#8221;justify&#8221;]The concrete objective of the project is [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":657,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20,21],"tags":[],"class_list":["post-1449","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-portofoliu-en","category-portofoliu-desfasurare-en"],"featured_image_src":{"landsacpe":["https:\/\/www.micronanotech.ro\/wp-content\/uploads\/2020\/11\/research-pic-tiny.jpg",600,400,false],"list":["https:\/\/www.micronanotech.ro\/wp-content\/uploads\/2020\/11\/research-pic-tiny-463x348.jpg",463,348,true],"medium":["https:\/\/www.micronanotech.ro\/wp-content\/uploads\/2020\/11\/research-pic-tiny-300x200.jpg",300,200,true],"full":["https:\/\/www.micronanotech.ro\/wp-content\/uploads\/2020\/11\/research-pic-tiny.jpg",600,400,false]},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Oxide perovskites designed by configurational entropy - Micronanotech<\/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:\/\/www.micronanotech.ro\/en\/oxide-perovskites-designed-by-configurational-entropy\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oxide perovskites designed by configurational entropy - Micronanotech\" \/>\n<meta property=\"og:description\" content=\"[vc_row][vc_column][\/vc_column][\/vc_row][vc_row equal_height=&#8221;yes&#8221;][vc_column offset=&#8221;vc_col-md-8&#8243;][vc_single_image image=&#8221;665&#8243; img_size=&#8221;full&#8221;][\/vc_column][vc_column css=&#8221;.vc_custom_1605772046492{padding-top: 15px !important;background-color: #f3fbfe !important;}&#8221; offset=&#8221;vc_col-md-4&#8243;][\/vc_column][\/vc_row][vc_row el_class=&#8221;padding-65&#8243;][vc_column][vc_tabs type=&#8221;tabs-simple&#8221; icon_style=&#8221;featured-boxes-style-6&#8243; icon_effect=&#8221;featured-box-effect-6&#8243;][vc_tab show_icon=&#8221;yes&#8221; icon_type=&#8221;simpleline&#8221; icon_simpleline=&#8221;Simple-Line-Icons-people&#8221; title=&#8221;Project Team&#8221; tab_id=&#8221;7224df3a-ec68-8&#8243;][vc_row_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;614&#8243; img_size=&#8221;full&#8221; css=&#8221;.vc_custom_1605772093012{margin-bottom: 35px !important;}&#8221;][\/vc_column_inner][vc_column_inner el_class=&#8221;echipa&#8221; width=&#8221;1\/2&#8243;][vc_column_text]Project manager: Lect. Dr. Eng. Vasile-Adrian SURDU Supervisor: Prof. Dr. Eng. 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