The effect of graphene on the activation energy of grain growth for the nanocrystalline thermoelectric n-type Bi2Te2.7Se0.3
<p>Even though bismuth telluride is frequently produced by mechanical alloying for thermoelectric materials, no data has been published addressing the thermal behavior and activation energy of the milled n-type Bi2Te2.7Se0.3 powders. This paper studies the activation energy of grain growth for...
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| مؤلفون آخرون: | , , |
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2022
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| _version_ | 1864513567063015424 |
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| author | Farah M. El-Makaty (14157090) |
| author2 | Nandagopal S. Pothuvattil (14157093) Abdelmagid Hamouda (14157096) Khaled M. Youssef (14157099) |
| author2_role | author author author |
| author_facet | Farah M. El-Makaty (14157090) Nandagopal S. Pothuvattil (14157093) Abdelmagid Hamouda (14157096) Khaled M. Youssef (14157099) |
| author_role | author |
| dc.creator.none.fl_str_mv | Farah M. El-Makaty (14157090) Nandagopal S. Pothuvattil (14157093) Abdelmagid Hamouda (14157096) Khaled M. Youssef (14157099) |
| dc.date.none.fl_str_mv | 2022-11-22T21:16:16Z |
| dc.identifier.none.fl_str_mv | 10.1007/s42247-022-00416-5 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/The_effect_of_graphene_on_the_activation_energy_of_grain_growth_for_the_nanocrystalline_thermoelectric_n-type_Bi2Te2_7Se0_3/21601503 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Environmental engineering Waste Management and Disposal Renewable Energy, Sustainability and the Environment Biomaterials Ceramics and Composites |
| dc.title.none.fl_str_mv | The effect of graphene on the activation energy of grain growth for the nanocrystalline thermoelectric n-type Bi2Te2.7Se0.3 |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p>Even though bismuth telluride is frequently produced by mechanical alloying for thermoelectric materials, no data has been published addressing the thermal behavior and activation energy of the milled n-type Bi2Te2.7Se0.3 powders. This paper studies the activation energy of grain growth for the nanocrystalline n-type Bi2Te2.7Se0.3 and two graphene-Bi2Te2.7Se0.3 composites with different graphene concentrations (0.05 and 0.5 wt.%). Grain size and structural analyses of these samples have been carried out using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The thermal stability of the three samples is investigated by incorporating differential scanning calorimetry data with the Kissinger model. The activation energy of the pristine Bi2Te2.7Se0.3 alloy is found to be 268 kJ/mol. For the composite samples, a lower graphene weight percentage (0.05 wt.%) increased the activation energy to 270 kJ/mol. In contrast, higher amounts of graphene (0.5 wt.%) reduced the activation energy significantly to 254 kJ/mol. The observed effect is found to be directly related to graphene’s exfoliation in the bismuth telluride matrix. These results offer a better understanding of the thermal behavior of the nanocrystalline pristine n-type Bi2Te2.7Se0.3 and the influence of graphene nanofiller on the thermal stability of the bismuth telluride nanocomposites.</p><h2>Other Information</h2> <p> Published in: Emergent Materials<br> License: <a href="https://creativecommons.org/licenses/by/4.0" target="_blank">https://creativecommons.org/licenses/by/4.0</a><br>See article on publisher's website: <a href="http://dx.doi.org/10.1007/s42247-022-00416-5" target="_blank">http://dx.doi.org/10.1007/s42247-022-00416-5</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_afaf8f6450aa9e48dfa5ad9b9bd42c93 |
| identifier_str_mv | 10.1007/s42247-022-00416-5 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/21601503 |
| publishDate | 2022 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | The effect of graphene on the activation energy of grain growth for the nanocrystalline thermoelectric n-type Bi2Te2.7Se0.3Farah M. El-Makaty (14157090)Nandagopal S. Pothuvattil (14157093)Abdelmagid Hamouda (14157096)Khaled M. Youssef (14157099)Environmental engineeringWaste Management and DisposalRenewable Energy, Sustainability and the EnvironmentBiomaterialsCeramics and Composites<p>Even though bismuth telluride is frequently produced by mechanical alloying for thermoelectric materials, no data has been published addressing the thermal behavior and activation energy of the milled n-type Bi2Te2.7Se0.3 powders. This paper studies the activation energy of grain growth for the nanocrystalline n-type Bi2Te2.7Se0.3 and two graphene-Bi2Te2.7Se0.3 composites with different graphene concentrations (0.05 and 0.5 wt.%). Grain size and structural analyses of these samples have been carried out using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The thermal stability of the three samples is investigated by incorporating differential scanning calorimetry data with the Kissinger model. The activation energy of the pristine Bi2Te2.7Se0.3 alloy is found to be 268 kJ/mol. For the composite samples, a lower graphene weight percentage (0.05 wt.%) increased the activation energy to 270 kJ/mol. In contrast, higher amounts of graphene (0.5 wt.%) reduced the activation energy significantly to 254 kJ/mol. The observed effect is found to be directly related to graphene’s exfoliation in the bismuth telluride matrix. These results offer a better understanding of the thermal behavior of the nanocrystalline pristine n-type Bi2Te2.7Se0.3 and the influence of graphene nanofiller on the thermal stability of the bismuth telluride nanocomposites.</p><h2>Other Information</h2> <p> Published in: Emergent Materials<br> License: <a href="https://creativecommons.org/licenses/by/4.0" target="_blank">https://creativecommons.org/licenses/by/4.0</a><br>See article on publisher's website: <a href="http://dx.doi.org/10.1007/s42247-022-00416-5" target="_blank">http://dx.doi.org/10.1007/s42247-022-00416-5</a></p>2022-11-22T21:16:16ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1007/s42247-022-00416-5https://figshare.com/articles/journal_contribution/The_effect_of_graphene_on_the_activation_energy_of_grain_growth_for_the_nanocrystalline_thermoelectric_n-type_Bi2Te2_7Se0_3/21601503CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/216015032022-11-22T21:16:16Z |
| spellingShingle | The effect of graphene on the activation energy of grain growth for the nanocrystalline thermoelectric n-type Bi2Te2.7Se0.3 Farah M. El-Makaty (14157090) Environmental engineering Waste Management and Disposal Renewable Energy, Sustainability and the Environment Biomaterials Ceramics and Composites |
| status_str | publishedVersion |
| title | The effect of graphene on the activation energy of grain growth for the nanocrystalline thermoelectric n-type Bi2Te2.7Se0.3 |
| title_full | The effect of graphene on the activation energy of grain growth for the nanocrystalline thermoelectric n-type Bi2Te2.7Se0.3 |
| title_fullStr | The effect of graphene on the activation energy of grain growth for the nanocrystalline thermoelectric n-type Bi2Te2.7Se0.3 |
| title_full_unstemmed | The effect of graphene on the activation energy of grain growth for the nanocrystalline thermoelectric n-type Bi2Te2.7Se0.3 |
| title_short | The effect of graphene on the activation energy of grain growth for the nanocrystalline thermoelectric n-type Bi2Te2.7Se0.3 |
| title_sort | The effect of graphene on the activation energy of grain growth for the nanocrystalline thermoelectric n-type Bi2Te2.7Se0.3 |
| topic | Environmental engineering Waste Management and Disposal Renewable Energy, Sustainability and the Environment Biomaterials Ceramics and Composites |