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dc.contributor.author
Yasno Gaviria, Juan Pablo
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dc.contributor.author
Gunnewiek, Rodolfo F. K.
dc.contributor.author
Kiminami, Ruth H. G. A.
dc.date.available
2022-02-17T20:11:16Z
dc.date.issued
2019-07
dc.identifier.citation
Yasno Gaviria, Juan Pablo; Gunnewiek, Rodolfo F. K.; Kiminami, Ruth H. G. A.; Microwave synthesis of ultra-high temperature ceramic ZrC nanopowders; Elsevier Science; Advanced Powder Technology; 30; 7; 7-2019; 1348-1355
dc.identifier.issn
0921-8831
dc.identifier.uri
http://hdl.handle.net/11336/152234
dc.description.abstract
Ultra-high temperature ceramic zirconium carbide (ZrC) nanopowders were synthesized for the first time via a microwave-assisted carbothermal reduction reaction using zirconia (ZrO 2 ) and carbon black (C) as the starting materials. The effect of the reaction time on the formation of ZrC nanoparticles was examined. The as-synthesized samples were characterized using X-ray diffraction (XRD), helium pycnometry, Brunauer-Emmett-Teller (BET) N 2 adsorption, scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM). The lattice constant and interplanar distance (d 111 ) were calculated, and the crystallite size was obtained using the Scherrer formula. Results from the experiment show highly crystalline ZrC, with crystallites less than 50 nm and nearly-spherical morphology, using 3 kW of power and only 50 min of reaction time, with a maximum reaction temperature of 1400 °C, lower than those involved using the conventional heating carbothermal reduction. The reaction time was ∼2 h shorter than that required by using a combined sol-gel and microwave-assisted carbothermal reduction method, used to prepare submicron ZrC powders (200–300 nm). The high heating rate achieved on the synthesis was favored by the excellent microwave absorption of carbon black, and the uniform heating at molecular level induced by the microwaves on the samples.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
MICROWAVE-ASSISTED CARBOTHERMAL REDUCTION
dc.subject
NANOPOWDERS
dc.subject
SHORT-TIME SYNTHESIS
dc.subject
ZRC
dc.subject.classification
Cerámicos
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dc.subject.classification
Ingeniería de los Materiales
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Microwave synthesis of ultra-high temperature ceramic ZrC nanopowders
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-20T18:06:48Z
dc.journal.volume
30
dc.journal.number
7
dc.journal.pagination
1348-1355
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Yasno Gaviria, Juan Pablo. Universidade Federal do São Carlos; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Gunnewiek, Rodolfo F. K.. Universidade Federal do São Carlos; Brasil
dc.description.fil
Fil: Kiminami, Ruth H. G. A.. Universidade Federal do São Carlos; Brasil
dc.journal.title
Advanced Powder Technology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0921883119300901
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.apt.2019.04.010
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