Investigation of graphene dispersion on thermoelectric, magnetic, and mechanical properties of p-type Bi0.5Sb1.5Te3 alloys
In this research, polycrystalline p-type Bi0.5Sb1.5Te3 (BST)/x-wt% graphene (x = 0, 0.05, 0.1 and 0.2 wt%) composite bulks were fabricated to systematically investigate the effect of graphene content on thermoelectric, as well as magnetic and mechanical properties. The peaks corresponding to the D,...
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| Veröffentlicht in: | Materials chemistry and physics 2021-07, Vol.266, p.124512, Article 124512 |
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| creator | Sharief, Pathan Madavali, Babu Song, Sung Ho Lee, Jin Kyu Kim, Ki Buem Kim, Jong Tae Kim, Dong Hwan Han, Jun-Hyun Hong, Soon-Jik |
| description | In this research, polycrystalline p-type Bi0.5Sb1.5Te3 (BST)/x-wt% graphene (x = 0, 0.05, 0.1 and 0.2 wt%) composite bulks were fabricated to systematically investigate the effect of graphene content on thermoelectric, as well as magnetic and mechanical properties. The peaks corresponding to the D, G and 2D bands of graphene were clearly identified with Raman spectroscopy, and revealed that graphene was well dispersed in the BST matrix. The bulk fracture surfaces displayed randomly distributed grains and a progressive decrease in grain size, with increasing graphene content in the composite samples. A dramatic reduction in thermal conductivity of about 10%, and 12% was achieved for the 0.1, and 0.2 wt% graphene dispersed Bi0.5Sb1.5Te3 samples, respectively, due to the strong scattering of phonons at interfaces and fine grain boundaries. Thanks to the adequate power factor and the reduction in thermal conductivity by the incorporated graphene, the 0.1 wt% graphene dispersed Bi0.5Sb1.5Te3 sample showed the highest ZT value among all samples. Interestingly, a transformation from diamagnetic to para/ferro magnetic properties was observed after graphene incorporation, using magnetic hysteresis loops. Vickers hardness was also greatly improved, from 84.1 Hv to 103.8 Hv, and compressive strength was also increased. It was concluded that enhanced mechanical properties of the Bi0.5Sb1.5Te3 alloys was due to the strengthening effect of hierarchically structured graphene and reduced grain size.
[Display omitted]
•Successfully prepared Bi0.5Sb1.5Te3 (BST)/graphene composites and investigated graphene influence on BST properties.•The progressive decrement of BST grain size was achieved with graphene content.•A dramatic reduction in thermal conductivity of about 12% was achieved for the 0.2 wt% graphene dispersed BST sample.•Higher Vickers hardness of 103.8 Hv was attained which is 24% compared to the original BST sample. |
| doi_str_mv | 10.1016/j.matchemphys.2021.124512 |
| format | Article |
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[Display omitted]
•Successfully prepared Bi0.5Sb1.5Te3 (BST)/graphene composites and investigated graphene influence on BST properties.•The progressive decrement of BST grain size was achieved with graphene content.•A dramatic reduction in thermal conductivity of about 12% was achieved for the 0.2 wt% graphene dispersed BST sample.•Higher Vickers hardness of 103.8 Hv was attained which is 24% compared to the original BST sample.</description><identifier>ISSN: 0254-0584</identifier><identifier>EISSN: 1879-3312</identifier><identifier>DOI: 10.1016/j.matchemphys.2021.124512</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Bi0.5Sb1.5Te3 alloy ; Compressive strength ; Diamagnetism ; Diamond pyramid hardness ; Dispersion ; Fracture surfaces ; Grain boundaries ; Grain size ; Graphene ; Graphene content ; Hardness ; Heat conductivity ; Heat transfer ; Hysteresis loops ; Magnetic hysteresis ; Magnetic properties ; Mechanical properties ; Power factor ; Raman spectroscopy ; Reduction ; Thermal conductivity ; Thermoelectricity</subject><ispartof>Materials chemistry and physics, 2021-07, Vol.266, p.124512, Article 124512</ispartof><rights>2021 Elsevier B.V.</rights><rights>Copyright Elsevier BV Jul 1, 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c349t-c87708bd6b844728b5a9030a0698420c8e7025022bdc53a65dfde9f8efc9b8433</citedby><cites>FETCH-LOGICAL-c349t-c87708bd6b844728b5a9030a0698420c8e7025022bdc53a65dfde9f8efc9b8433</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.matchemphys.2021.124512$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>315,781,785,3551,27926,27927,45997</link.rule.ids></links><search><creatorcontrib>Sharief, Pathan</creatorcontrib><creatorcontrib>Madavali, Babu</creatorcontrib><creatorcontrib>Song, Sung Ho</creatorcontrib><creatorcontrib>Lee, Jin Kyu</creatorcontrib><creatorcontrib>Kim, Ki Buem</creatorcontrib><creatorcontrib>Kim, Jong Tae</creatorcontrib><creatorcontrib>Kim, Dong Hwan</creatorcontrib><creatorcontrib>Han, Jun-Hyun</creatorcontrib><creatorcontrib>Hong, Soon-Jik</creatorcontrib><title>Investigation of graphene dispersion on thermoelectric, magnetic, and mechanical properties of p-type Bi0.5Sb1.5Te3 alloys</title><title>Materials chemistry and physics</title><description>In this research, polycrystalline p-type Bi0.5Sb1.5Te3 (BST)/x-wt% graphene (x = 0, 0.05, 0.1 and 0.2 wt%) composite bulks were fabricated to systematically investigate the effect of graphene content on thermoelectric, as well as magnetic and mechanical properties. The peaks corresponding to the D, G and 2D bands of graphene were clearly identified with Raman spectroscopy, and revealed that graphene was well dispersed in the BST matrix. The bulk fracture surfaces displayed randomly distributed grains and a progressive decrease in grain size, with increasing graphene content in the composite samples. A dramatic reduction in thermal conductivity of about 10%, and 12% was achieved for the 0.1, and 0.2 wt% graphene dispersed Bi0.5Sb1.5Te3 samples, respectively, due to the strong scattering of phonons at interfaces and fine grain boundaries. Thanks to the adequate power factor and the reduction in thermal conductivity by the incorporated graphene, the 0.1 wt% graphene dispersed Bi0.5Sb1.5Te3 sample showed the highest ZT value among all samples. Interestingly, a transformation from diamagnetic to para/ferro magnetic properties was observed after graphene incorporation, using magnetic hysteresis loops. Vickers hardness was also greatly improved, from 84.1 Hv to 103.8 Hv, and compressive strength was also increased. It was concluded that enhanced mechanical properties of the Bi0.5Sb1.5Te3 alloys was due to the strengthening effect of hierarchically structured graphene and reduced grain size.
[Display omitted]
•Successfully prepared Bi0.5Sb1.5Te3 (BST)/graphene composites and investigated graphene influence on BST properties.•The progressive decrement of BST grain size was achieved with graphene content.•A dramatic reduction in thermal conductivity of about 12% was achieved for the 0.2 wt% graphene dispersed BST sample.•Higher Vickers hardness of 103.8 Hv was attained which is 24% compared to the original BST sample.</description><subject>Bi0.5Sb1.5Te3 alloy</subject><subject>Compressive strength</subject><subject>Diamagnetism</subject><subject>Diamond pyramid hardness</subject><subject>Dispersion</subject><subject>Fracture surfaces</subject><subject>Grain boundaries</subject><subject>Grain size</subject><subject>Graphene</subject><subject>Graphene content</subject><subject>Hardness</subject><subject>Heat conductivity</subject><subject>Heat transfer</subject><subject>Hysteresis loops</subject><subject>Magnetic hysteresis</subject><subject>Magnetic properties</subject><subject>Mechanical properties</subject><subject>Power factor</subject><subject>Raman spectroscopy</subject><subject>Reduction</subject><subject>Thermal conductivity</subject><subject>Thermoelectricity</subject><issn>0254-0584</issn><issn>1879-3312</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqNkMtOwzAQRS0EEuXxD0ZsSfAjTpwlVLwkJBaUteU4k8ZV4gTbIJWvx6UsWLKa0WjunbkHoQtKckpoeb3JRx1ND-Pcb0POCKM5ZYWg7AAtqKzqjHPKDtGCMFFkRMjiGJ2EsCGEVpTyBfp6cp8Qol3raCeHpw6vvZ57cIBbG2bw4WfscOzBjxMMYKK35gqPeu0g7jrtWjyC6bWzRg949lOSRQth5zZncTsDvrUkF68NzcUKONbDMG3DGTrq9BDg_Leeorf7u9XyMXt-eXha3jxnhhd1zIysKiKbtmxkUVRMNkLXhBNNyloWjBgJVQpHGGtaI7guRdu1UHcSOlMnCeen6HLvmz57_0hh1Wb68C6dVEyIkrCasypt1fst46cQPHRq9nbUfqsoUTvUaqP-oFY71GqPOmmXey2kGJ8WvArGgjPQWp94qXay_3D5BuVajhc</recordid><startdate>20210701</startdate><enddate>20210701</enddate><creator>Sharief, Pathan</creator><creator>Madavali, Babu</creator><creator>Song, Sung Ho</creator><creator>Lee, Jin Kyu</creator><creator>Kim, Ki Buem</creator><creator>Kim, Jong Tae</creator><creator>Kim, Dong Hwan</creator><creator>Han, Jun-Hyun</creator><creator>Hong, Soon-Jik</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20210701</creationdate><title>Investigation of graphene dispersion on thermoelectric, magnetic, and mechanical properties of p-type Bi0.5Sb1.5Te3 alloys</title><author>Sharief, Pathan ; Madavali, Babu ; Song, Sung Ho ; Lee, Jin Kyu ; Kim, Ki Buem ; Kim, Jong Tae ; Kim, Dong Hwan ; Han, Jun-Hyun ; Hong, Soon-Jik</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c349t-c87708bd6b844728b5a9030a0698420c8e7025022bdc53a65dfde9f8efc9b8433</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Bi0.5Sb1.5Te3 alloy</topic><topic>Compressive strength</topic><topic>Diamagnetism</topic><topic>Diamond pyramid hardness</topic><topic>Dispersion</topic><topic>Fracture surfaces</topic><topic>Grain boundaries</topic><topic>Grain size</topic><topic>Graphene</topic><topic>Graphene content</topic><topic>Hardness</topic><topic>Heat conductivity</topic><topic>Heat transfer</topic><topic>Hysteresis loops</topic><topic>Magnetic hysteresis</topic><topic>Magnetic properties</topic><topic>Mechanical properties</topic><topic>Power factor</topic><topic>Raman spectroscopy</topic><topic>Reduction</topic><topic>Thermal conductivity</topic><topic>Thermoelectricity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sharief, Pathan</creatorcontrib><creatorcontrib>Madavali, Babu</creatorcontrib><creatorcontrib>Song, Sung Ho</creatorcontrib><creatorcontrib>Lee, Jin Kyu</creatorcontrib><creatorcontrib>Kim, Ki Buem</creatorcontrib><creatorcontrib>Kim, Jong Tae</creatorcontrib><creatorcontrib>Kim, Dong Hwan</creatorcontrib><creatorcontrib>Han, Jun-Hyun</creatorcontrib><creatorcontrib>Hong, Soon-Jik</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Materials chemistry and physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sharief, Pathan</au><au>Madavali, Babu</au><au>Song, Sung Ho</au><au>Lee, Jin Kyu</au><au>Kim, Ki Buem</au><au>Kim, Jong Tae</au><au>Kim, Dong Hwan</au><au>Han, Jun-Hyun</au><au>Hong, Soon-Jik</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Investigation of graphene dispersion on thermoelectric, magnetic, and mechanical properties of p-type Bi0.5Sb1.5Te3 alloys</atitle><jtitle>Materials chemistry and physics</jtitle><date>2021-07-01</date><risdate>2021</risdate><volume>266</volume><spage>124512</spage><pages>124512-</pages><artnum>124512</artnum><issn>0254-0584</issn><eissn>1879-3312</eissn><abstract>In this research, polycrystalline p-type Bi0.5Sb1.5Te3 (BST)/x-wt% graphene (x = 0, 0.05, 0.1 and 0.2 wt%) composite bulks were fabricated to systematically investigate the effect of graphene content on thermoelectric, as well as magnetic and mechanical properties. The peaks corresponding to the D, G and 2D bands of graphene were clearly identified with Raman spectroscopy, and revealed that graphene was well dispersed in the BST matrix. The bulk fracture surfaces displayed randomly distributed grains and a progressive decrease in grain size, with increasing graphene content in the composite samples. A dramatic reduction in thermal conductivity of about 10%, and 12% was achieved for the 0.1, and 0.2 wt% graphene dispersed Bi0.5Sb1.5Te3 samples, respectively, due to the strong scattering of phonons at interfaces and fine grain boundaries. Thanks to the adequate power factor and the reduction in thermal conductivity by the incorporated graphene, the 0.1 wt% graphene dispersed Bi0.5Sb1.5Te3 sample showed the highest ZT value among all samples. Interestingly, a transformation from diamagnetic to para/ferro magnetic properties was observed after graphene incorporation, using magnetic hysteresis loops. Vickers hardness was also greatly improved, from 84.1 Hv to 103.8 Hv, and compressive strength was also increased. It was concluded that enhanced mechanical properties of the Bi0.5Sb1.5Te3 alloys was due to the strengthening effect of hierarchically structured graphene and reduced grain size.
[Display omitted]
•Successfully prepared Bi0.5Sb1.5Te3 (BST)/graphene composites and investigated graphene influence on BST properties.•The progressive decrement of BST grain size was achieved with graphene content.•A dramatic reduction in thermal conductivity of about 12% was achieved for the 0.2 wt% graphene dispersed BST sample.•Higher Vickers hardness of 103.8 Hv was attained which is 24% compared to the original BST sample.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.matchemphys.2021.124512</doi></addata></record> |
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| subjects | Bi0.5Sb1.5Te3 alloy Compressive strength Diamagnetism Diamond pyramid hardness Dispersion Fracture surfaces Grain boundaries Grain size Graphene Graphene content Hardness Heat conductivity Heat transfer Hysteresis loops Magnetic hysteresis Magnetic properties Mechanical properties Power factor Raman spectroscopy Reduction Thermal conductivity Thermoelectricity |
| title | Investigation of graphene dispersion on thermoelectric, magnetic, and mechanical properties of p-type Bi0.5Sb1.5Te3 alloys |
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