Non-isothermal reaction mechanism and kinetic analysis for the synthesis of monoclinic lithium zirconate (m-Li2ZrO3) during solid-state reaction
Non-isothermal reaction mechanism and kinetic analysis for the synthesis of monoclinic lithium zirconate (m- Li2ZrO3) were investigated by processing of TG-DTA, along with XRD, DLS, and HRTEM. For this purpose, the solidstate reaction of Li2CO3 with ZrO2 was carried out by TG-DTA at different heatin...
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| Autores principales: | , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2021
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/118968 |
| Aporte de: |
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I19-R120-10915-118968 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Química M-Li2ZrO3 Solid-state reaction kinetics Non-isothermal TG-DTA XRD |
| spellingShingle |
Química M-Li2ZrO3 Solid-state reaction kinetics Non-isothermal TG-DTA XRD Yasnó, Juan Pablo Conconi, María Susana Visintin, Arnaldo Suárez, Gustavo Non-isothermal reaction mechanism and kinetic analysis for the synthesis of monoclinic lithium zirconate (m-Li2ZrO3) during solid-state reaction |
| topic_facet |
Química M-Li2ZrO3 Solid-state reaction kinetics Non-isothermal TG-DTA XRD |
| description |
Non-isothermal reaction mechanism and kinetic analysis for the synthesis of monoclinic lithium zirconate (m- Li2ZrO3) were investigated by processing of TG-DTA, along with XRD, DLS, and HRTEM. For this purpose, the solidstate reaction of Li2CO3 with ZrO2 was carried out by TG-DTA at different heating rates (10, 20, and 30 °C/min) from room temperature to 1100 °C. The thermal data was used to calculate the kinetic parameters by two types of isoconversional methods: Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS). The reaction mechanism was determined by the model-fitting method, applying the Coats-Redfern (CR) approximation to the different solidstate reaction models. The results confirmed the formation of pure m-Li2ZrO3, consists of semispherical particles of about 490 nm, using a very short reaction time. The average activation energy obtained by FWO and KAS methods were 274.73 and 272.50 kJ/mol, respectively. It was found that the formation of m-Li2ZrO3 from Li2CO3 with ZrO2 is governed by the three-dimensional diffusion mechanism. Based on these results, a microscopic reaction model of the formation of m-Li2ZrO3 was proposed. |
| format |
Articulo Articulo |
| author |
Yasnó, Juan Pablo Conconi, María Susana Visintin, Arnaldo Suárez, Gustavo |
| author_facet |
Yasnó, Juan Pablo Conconi, María Susana Visintin, Arnaldo Suárez, Gustavo |
| author_sort |
Yasnó, Juan Pablo |
| title |
Non-isothermal reaction mechanism and kinetic analysis for the synthesis of
monoclinic lithium zirconate (m-Li2ZrO3) during solid-state reaction |
| title_short |
Non-isothermal reaction mechanism and kinetic analysis for the synthesis of
monoclinic lithium zirconate (m-Li2ZrO3) during solid-state reaction |
| title_full |
Non-isothermal reaction mechanism and kinetic analysis for the synthesis of
monoclinic lithium zirconate (m-Li2ZrO3) during solid-state reaction |
| title_fullStr |
Non-isothermal reaction mechanism and kinetic analysis for the synthesis of
monoclinic lithium zirconate (m-Li2ZrO3) during solid-state reaction |
| title_full_unstemmed |
Non-isothermal reaction mechanism and kinetic analysis for the synthesis of
monoclinic lithium zirconate (m-Li2ZrO3) during solid-state reaction |
| title_sort |
non-isothermal reaction mechanism and kinetic analysis for the synthesis of
monoclinic lithium zirconate (m-li2zro3) during solid-state reaction |
| publishDate |
2021 |
| url |
http://sedici.unlp.edu.ar/handle/10915/118968 |
| work_keys_str_mv |
AT yasnojuanpablo nonisothermalreactionmechanismandkineticanalysisforthesynthesisofmonocliniclithiumzirconatemli2zro3duringsolidstatereaction AT conconimariasusana nonisothermalreactionmechanismandkineticanalysisforthesynthesisofmonocliniclithiumzirconatemli2zro3duringsolidstatereaction AT visintinarnaldo nonisothermalreactionmechanismandkineticanalysisforthesynthesisofmonocliniclithiumzirconatemli2zro3duringsolidstatereaction AT suarezgustavo nonisothermalreactionmechanismandkineticanalysisforthesynthesisofmonocliniclithiumzirconatemli2zro3duringsolidstatereaction |
| bdutipo_str |
Repositorios |
| _version_ |
1764820447756550146 |