Micro-crystalline Evolution and Enhanced Mechanical Properties of Continuous BN Fibers

Micro-crystalline Evolution and Enhanced Mechanical Properties of Continuous BN Fibers | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Micro-crystalline Evolution and Enhanced Mechanical Properties of Continuous BN Fibers Xueli Qi, Weichen Ding, Haonan Xu, Yujiao Wang, Zhiqiang Cheng, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4339750/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract With their unique combination of low density, high thermal conductivity, high thermal stability, excellent chemical inertness, and good dielectric properties, boron nitride (BN) fibers are promising for advanced material applications, particularly in the field of electromagnetic wave transmission. The fabrication of high-quality, continuous BN fibers via inorganic methods still faces unresolved challenges. In this study, continuous boron oxide (B 2 O 3 ) precursor fibers were initially produced using a melt spinning process with boric acid as the raw material. Subsequently, primary BN fiber products containing residual B 2 O 3 (referred to as BNO) and final BN fibers were successively prepared through a two-step nitridation process. The effects of the drawing process and the initial nitridation temperature on the composition and phase constitution of B 2 O 3 were extensively investigated. Additionally, it explored the processes of crystallization and orientation evolution in continuous BN fibers, thereby elucidating the impact of micro-structure on the mechanical properties of both BNO and BN fibers. It is noteworthy that the continuous BN fibers, subjected to a secondary nitridation process at 1850°C, exhibited exceptional mechanical properties, with a tensile strength of 890.9 MPa and an elastic modulus of 40.8 GPa. This study not only produce continuous BN fibers with exceptional mechanical properties but also provide a detailed description of their synthesis process and structural evolution, offering valuable insights for enhancing the mechanical performance of continuous fibrous materials with two-dimensional structure. BN fiber Inorganic conversion method Micro-structure Mechanical property Full Text Additional Declarations No competing interests reported. Supplementary Files SupportingInformation.docx Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4339750","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":304856025,"identity":"c2b032f8-fd49-475d-b357-27b228b1b8c9","order_by":0,"name":"Xueli Qi","email":"","orcid":"","institution":"Chongqing University","correspondingAuthor":false,"prefix":"","firstName":"Xueli","middleName":"","lastName":"Qi","suffix":""},{"id":304856026,"identity":"917aad79-da04-4cca-80d4-1729af4079b3","order_by":1,"name":"Weichen Ding","email":"","orcid":"","institution":"Shandong Industrial Ceramic Research \u0026 Degisn insitute Co.Ltd","correspondingAuthor":false,"prefix":"","firstName":"Weichen","middleName":"","lastName":"Ding","suffix":""},{"id":304856027,"identity":"8bb086b9-d2aa-4e0d-a34b-4ac745f10629","order_by":2,"name":"Haonan Xu","email":"","orcid":"","institution":"Shandong Industrial Ceramic Research \u0026 Degisn insitute Co.Ltd","correspondingAuthor":false,"prefix":"","firstName":"Haonan","middleName":"","lastName":"Xu","suffix":""},{"id":304856028,"identity":"53d57265-35ff-468a-a543-0a1819b35e99","order_by":3,"name":"Yujiao Wang","email":"","orcid":"","institution":"Shandong Industrial Ceramic Research \u0026 Degisn insitute Co.Ltd","correspondingAuthor":false,"prefix":"","firstName":"Yujiao","middleName":"","lastName":"Wang","suffix":""},{"id":304856029,"identity":"83a8826e-9771-4c94-a6ed-869b197e7fd9","order_by":4,"name":"Zhiqiang Cheng","email":"","orcid":"","institution":"Shandong Industrial Ceramic Research \u0026 Degisn insitute Co.Ltd","correspondingAuthor":false,"prefix":"","firstName":"Zhiqiang","middleName":"","lastName":"Cheng","suffix":""},{"id":304856030,"identity":"b8d66f32-df90-4713-b37f-ccfa03b91961","order_by":5,"name":"Meng Zhang","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA8klEQVRIiWNgGAWjYLACxgYgwd4A5R0gWgsPSGkCSVokEojUotvee/jlzx12efKRj7dJ/vzBIMd3I4HxcwEeLWZnzqVZSJ5JLja8nVYmzZPAYCx5I4FZegY+LTdyzAwM25gTN87OMZMGOixxw40ENmYefFruvzEzSGyrT9w484yZ5I8EhnrCWm7wGD842HY4cb4Ej5kE0GEJBgS1nMkxY2xsO564gSet2JonTcJw5pmHzdJ4tRw/Y/zxZ1t14vz2wxtv/rCxkec7nnzwMz4tQMAmASINDjAYACkQGxxNeAHzBxAp3wDWMgpGwSgYBaMAEwAAwC9Pky0orL4AAAAASUVORK5CYII=","orcid":"","institution":"Qingdao University of Science and Technology","correspondingAuthor":true,"prefix":"","firstName":"Meng","middleName":"","lastName":"Zhang","suffix":""},{"id":304856031,"identity":"2b193fbc-6b72-423a-8d07-67c2a0a9a85e","order_by":6,"name":"Zhihao Wang","email":"","orcid":"","institution":"Qilu University of Technology (Shandong Academy of Sciences)","correspondingAuthor":false,"prefix":"","firstName":"Zhihao","middleName":"","lastName":"Wang","suffix":""},{"id":304856032,"identity":"584f0db5-ef32-40ea-b547-47d0a287b431","order_by":7,"name":"Jianyao Yao","email":"","orcid":"","institution":"Chongqing University","correspondingAuthor":false,"prefix":"","firstName":"Jianyao","middleName":"","lastName":"Yao","suffix":""}],"badges":[],"createdAt":"2024-04-29 02:21:34","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4339750/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4339750/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":57559274,"identity":"f84f81c0-87a0-40ad-8ddb-46855d233f60","added_by":"auto","created_at":"2024-06-02 06:24:06","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1111978,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4339750/v1_covered_5098ca16-cb0c-4427-8005-4f35507f739f.pdf"},{"id":57503267,"identity":"5ece90c1-f39b-4cfd-bf0d-9471842f231c","added_by":"auto","created_at":"2024-05-31 14:27:04","extension":"docx","order_by":1,"title":"","display":"","copyAsset":false,"role":"supplement","size":752450,"visible":true,"origin":"","legend":"","description":"","filename":"SupportingInformation.docx","url":"https://assets-eu.researchsquare.com/files/rs-4339750/v1/6ed992c85ad1c31accca4b23.docx"}],"financialInterests":"No competing interests reported.","formattedTitle":"Micro-crystalline Evolution and Enhanced Mechanical Properties of Continuous BN Fibers","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"BN fiber, Inorganic conversion method, Micro-structure, Mechanical property","lastPublishedDoi":"10.21203/rs.3.rs-4339750/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4339750/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eWith their unique combination of low density, high thermal conductivity, high thermal stability, excellent chemical inertness, and good dielectric properties, boron nitride (BN) fibers are promising for advanced material applications, particularly in the field of electromagnetic wave transmission. The fabrication of high-quality, continuous BN fibers via inorganic methods still faces unresolved challenges. In this study, continuous boron oxide (B\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e) precursor fibers were initially produced using a melt spinning process with boric acid as the raw material. Subsequently, primary BN fiber products containing residual B\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e (referred to as BNO) and final BN fibers were successively prepared through a two-step nitridation process. The effects of the drawing process and the initial nitridation temperature on the composition and phase constitution of B\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e were extensively investigated. Additionally, it explored the processes of crystallization and orientation evolution in continuous BN fibers, thereby elucidating the impact of micro-structure on the mechanical properties of both BNO and BN fibers. It is noteworthy that the continuous BN fibers, subjected to a secondary nitridation process at 1850\u0026deg;C, exhibited exceptional mechanical properties, with a tensile strength of 890.9 MPa and an elastic modulus of 40.8 GPa. This study not only produce continuous BN fibers with exceptional mechanical properties but also provide a detailed description of their synthesis process and structural evolution, offering valuable insights for enhancing the mechanical performance of continuous fibrous materials with two-dimensional structure.\u003c/p\u003e","manuscriptTitle":"Micro-crystalline Evolution and Enhanced Mechanical Properties of Continuous BN Fibers","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-05-31 14:26:58","doi":"10.21203/rs.3.rs-4339750/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"edb79811-fa58-4992-9db8-185054046e75","owner":[],"postedDate":"May 31st, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2024-06-02T06:15:57+00:00","versionOfRecord":[],"versionCreatedAt":"2024-05-31 14:26:58","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-4339750","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4339750","identity":"rs-4339750","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}