{"corpus_id":244800311,"paper_sha":"e3c3fdbaff1e1dbab553b801681aaa19be22a0ff","doi":"10.1021/acsami.1c19172","arxiv_id":null,"pmid":34854669,"pmcid":null,"mag_id":null,"dblp_id":null,"acl_id":null,"title":"Enhancing the Thermoelectric and Mechanical Properties of Bi0.5Sb1.5Te3 Modulated by the Texture and Dense Dislocation Networks.","year":2021,"publication_date":"2021-12-02","venue":"ACS Applied Materials and Interfaces","journal":{"name":"ACS applied materials & interfaces","pages":null,"volume":null},"journal_issn":null,"journal_title":null,"publication_types":["JournalArticle"],"pubmed_pub_types":["Journal Article"],"s2_fields_of_study":["Medicine","Materials Science","Physics","Engineering"],"reference_count":52,"citation_count":20,"influential_citation_count":0,"is_open_access":false,"arxiv_categories":null,"arxiv_license":null,"arxiv_journal_ref":null,"mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":5,"s2_open_access_pdf_url":null,"s2_open_access_landing_url":null,"s2_open_access_license":null,"s2_open_access_status":null,"pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"Bi2Te3-based materials are dominating thermoelectrics for almost all of the room-temperature applications. To meet the future demands, both their thermoelectric (TE) and mechanical properties need to be further improved, which are the requisite for efficient TE modules applied in areas such as reliable micro-cooling. The conventional zone melting (ZM) and powder metallurgy (PM) methods fall short in preparing Bi2Te3-based alloys, which have both a highly textured structure for high TE properties and a fine-grained microstructure for high mechanical properties. Herein, a mechanical exfoliation combined with spark plasma sintering (ME-SPS) method is developed to prepare Bi0.5Sb1.5Te3 with highly improved mechanical properties (correlated mainly to the dislocation networks), as well as significantly improved thermoelectric properties (correlated mainly to the texture structure). In the method, both the dislocation density and the orientation factor (F) can be tuned by the sintering pressure. At a sintering pressure of 20 MPa, an exceptional F of up to 0.8 is retained, leading to an excellent power factor of 4.8 mW m-1 K-2 that is much higher than that of the PM polycrystalline. Meanwhile, the method can readily induce high-density dislocations (up to ∼1010 cm-2), improving the mechanical properties and reducing the lattice thermal conductivity as compared to the ZM ingot. In the exfoliated and then sintered (20 MPa) sample, the figure-of-merit ZT = 1.2 (at 350 K), which has increased by about ∼20%, and the compressive strength has also increased by ∼20%, compared to those of the ZM ingot, respectively. These results demonstrate that the ME-SPS method is highly effective in preparing high-performance Bi2Te3-based alloys, which are critical for TE modules in commercial applications at near-room temperature.","claims":[{"public_id":"cl_9ff820e3ea7f4b9d7d7a66a0c6438cab","status":"active","text":"At 20 MPa, the retained orientation factor reaches 0.8 and the power factor reaches 4.8 mW m-1 K-2, exceeding the PM polycrystalline material.","confidence":0.97,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_9ff820e3ea7f4b9d7d7a66a0c6438cab"},{"public_id":"cl_1486b44d654793949dfa368017627dc0","status":"active","text":"Mechanical exfoliation combined with spark plasma sintering produces Bi0.5Sb1.5Te3 with improved thermoelectric performance and improved mechanical properties.","confidence":0.98,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_1486b44d654793949dfa368017627dc0"},{"public_id":"cl_cb2f1d77868209a7adaf0b1ffa98aeba","status":"active","text":"Sintering pressure tunes both dislocation density and orientation factor.","confidence":0.95,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_cb2f1d77868209a7adaf0b1ffa98aeba"},{"public_id":"cl_b5dd8e72b830fe14582733ae159abd24","status":"active","text":"The exfoliated and then sintered sample at 20 MPa achieves ZT = 1.2 at 350 K and about a 20% increase in compressive strength relative to the ZM ingot.","confidence":0.98,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_b5dd8e72b830fe14582733ae159abd24"},{"public_id":"cl_c20b68da0e3b95886ddc706a94233402","status":"active","text":"Thermoelectric performance is mainly associated with the texture structure, while mechanical improvement is mainly associated with dense dislocation networks.","confidence":0.93,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_c20b68da0e3b95886ddc706a94233402"}],"concepts":[{"public_id":"co_1710360cd8142e34e797796f7723bd3d","status":"active","name":"power factor","description":"A thermoelectric performance metric combining electrical conductivity and Seebeck coefficient.","types":["performance metric"],"aliases":[],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_1710360cd8142e34e797796f7723bd3d"},{"public_id":"co_1c015532e5611e03d58d73999065dc5e","status":"active","name":"Bi0.5Sb1.5Te3","description":"A bismuth-antimony-telluride thermoelectric alloy examined as the target material.","types":["material"],"aliases":["Bi2Te3-based alloy"],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_1c015532e5611e03d58d73999065dc5e"},{"public_id":"co_2a6c250d91060bbe8b55eef275eeb882","status":"active","name":"mechanical properties","description":"The material's resistance to mechanical deformation and failure.","types":["property"],"aliases":[],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_2a6c250d91060bbe8b55eef275eeb882"},{"public_id":"co_317617f2da214416ad128a2f87c1a579","status":"active","name":"ZM ingot","description":"A zone-melted ingot used as a comparison material in the study.","types":["baseline","material"],"aliases":["zone melting ingot"],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_317617f2da214416ad128a2f87c1a579"},{"public_id":"co_528dea2380b84c629358583718b30fce","status":"active","name":"dense dislocation networks","description":"Closely spaced arrangements of crystal defects within the material.","types":["microstructure","defect structure"],"aliases":["high-density dislocations"],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_528dea2380b84c629358583718b30fce"},{"public_id":"co_5894ac5a7e576860683eac3c1c5f48c9","status":"active","name":"mechanical exfoliation combined with spark plasma sintering","description":"A processing route that combines exfoliation with rapid pressure-assisted sintering to fabricate the alloy.","types":["method"],"aliases":["ME-SPS"],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_5894ac5a7e576860683eac3c1c5f48c9"},{"public_id":"co_5e13e571306a61923f43da89462d7d23","status":"active","name":"20 MPa","description":"The sintering pressure value reported as the optimal processing condition.","types":["process condition"],"aliases":[],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_5e13e571306a61923f43da89462d7d23"},{"public_id":"co_6f2e0ea19c5e59a41c019e9d80416a32","status":"active","name":"PM polycrystalline","description":"A powder-metallurgy-derived polycrystalline comparison material.","types":["baseline","material"],"aliases":["powder metallurgy polycrystalline"],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_6f2e0ea19c5e59a41c019e9d80416a32"},{"public_id":"co_79f19e9c21693969c161ff062118ee27","status":"active","name":"orientation factor","description":"A measure of the degree of preferred orientation in the textured sample.","types":["microstructural parameter"],"aliases":["F"],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_79f19e9c21693969c161ff062118ee27"},{"public_id":"co_a1ca054b67db6b90820b8244bdc3dd9e","status":"active","name":"figure-of-merit ZT","description":"A dimensionless thermoelectric efficiency metric used to compare material performance.","types":["performance metric"],"aliases":["ZT"],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_a1ca054b67db6b90820b8244bdc3dd9e"},{"public_id":"co_aa90e0ec68b0246b9d012587908a8143","status":"active","name":"thermoelectric properties","description":"The material properties governing direct conversion between heat and electrical energy.","types":["property"],"aliases":["TE properties"],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_aa90e0ec68b0246b9d012587908a8143"},{"public_id":"co_cd4a2063433a4115794229204dab1e79","status":"active","name":"sintering pressure","description":"The applied pressure during spark plasma sintering used to control microstructure.","types":["process parameter"],"aliases":[],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_cd4a2063433a4115794229204dab1e79"},{"public_id":"co_d0464d1fdfaf8ed9c953179c810223ff","status":"active","name":"dislocation density","description":"The amount of dislocations present per unit volume or area in the material.","types":["microstructural parameter"],"aliases":[],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_d0464d1fdfaf8ed9c953179c810223ff"},{"public_id":"co_e8664d355db5a6cfb996c10da994c392","status":"active","name":"compressive strength","description":"The stress a material can withstand under compression before failure or significant deformation.","types":["mechanical property"],"aliases":[],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_e8664d355db5a6cfb996c10da994c392"},{"public_id":"co_ec90df94cc662cb832dc70410aefed8d","status":"active","name":"texture structure","description":"A preferred crystallographic orientation in the polycrystalline material.","types":["microstructure"],"aliases":["highly textured structure"],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_ec90df94cc662cb832dc70410aefed8d"}],"external_ids":{"DOI":"10.1021/acsami.1c19172","ArXiv":null,"PubMed":34854669,"PubMedCentral":null,"MAG":null,"DBLP":null,"ACL":null},"open_access":{"is_open_access":false,"pdf_url":null,"landing_url":"https://sah.borca.ai/papers/244800311","source":null,"pdf_url_source":null,"license":null,"reason":"pdf_url_not_indexed"},"reference_availability":{"status":"available","references_indexed":true,"full_text_available":false,"full_text_source":null,"count_basis":"semantic_scholar_metadata","extraction_status":"not_applicable","reason":null},"source":{"provider":"episteme2","base_corpus":"semantic_scholar_dump","freshness_mode":"unknown","basis":["semantic_scholar_metadata","postgres_metadata"],"limits":["paper metadata is based on indexed upstream scholarly datasets","claims and concepts are available only for extracted papers","absence of claims or concepts means no extracted graph data is available in this response"],"status":"available","degraded":false,"degraded_reasons":[],"diagnostics":{"status":"available","degraded":false,"degraded_reasons":[],"metadata_status":"available","graph_status":"available","abstract_status":"available"},"source_flags":5},"paper_id":631068,"paper_uid":"610d5854-5691-4283-9439-2181748390ae","canonical_identity":{"paper_id":631068,"paper_uid":"610d5854-5691-4283-9439-2181748390ae","identity_status":"available","lookup_basis":"semantic_scholar_external_id","compatibility_path":"corpus_id"},"url":"https://sah.borca.ai/papers/244800311"}