In-situ spectroscopy and two-color thermography during microwave irradiation in materials processing

[EN] Concentration of microwave E-field between material particles is considered to cause the enhancement of sintering1 and chemical reaction under microwave irradiation. For example, it is usually required 1700 °C to synthesize AlN by carbothermal reduction method using Al2O3 as a starting material...

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Detalles Bibliográficos
Autores: Fukushima, Jun, Takizawa, Hirotsugu
Tipo de recurso: capítulo de libro
Fecha de publicación:2019
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/130892
Acceso en línea:https://riunet.upv.es/handle/10251/130892
Access Level:acceso abierto
Palabra clave:Energy Production by Microwaves
Microwave CVD
EM Modelling
Microwave Material interaction
Dielectric Properties
Dielectric Properties Measurement
Solid State Microwave
Microwave Processing
Microwave Chemistry
Microwave applicators design
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spelling In-situ spectroscopy and two-color thermography during microwave irradiation in materials processingFukushima, JunTakizawa, HirotsuguEnergy Production by MicrowavesMicrowave CVDEM ModellingMicrowave Material interactionDielectric PropertiesDielectric Properties MeasurementSolid State MicrowaveMicrowave ProcessingMicrowave ChemistryMicrowave applicators design[EN] Concentration of microwave E-field between material particles is considered to cause the enhancement of sintering1 and chemical reaction under microwave irradiation. For example, it is usually required 1700 °C to synthesize AlN by carbothermal reduction method using Al2O3 as a starting material, but microwave processing can proceed this process at 1200 °C2. To understand this phenomenon, it is necessary to understand an occurrence behavior of plasma and a chemical reaction related to radical species generated by a local E-field concentration. In addition, in material synthesis using a raw material powder of several mm, it is suggested that a selective heating in the powder scale occurs. However, to discuss this selective heating behavior on this scale, it is necessary to realize a quantitative temperature measurement system with independent of the emissivity of the material and several mm spatial resolution. In this study, we conducted an in-situ spectroscopy and two-color thermography to verify these non-equilibrium effects during microwave irradiation. For example, in the iron making process, it was investigated that CN plasma was generated, and this CN radical contributed to the reduction reaction (Fig. 1(a))3. In addition, the developed two-dimensional two-color thermography system with a high resolution of 8.8 mm/pixel was enable to discuss local temperature gradients quantitatively (Fig. 1(b)).This work was supported by a JSPS Grant-in-Aid for Scientific Research (S) No. JP17H06156.Editorial Universitat Politècnica de ValènciaJapan Society for the Promotion of ScienceRepositorio Institucional de la Universitat Politècnica de València Riunet20192019-10-15book parthttp://purl.org/coar/resource_type/c_3248VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/bookPartapplication/pdfhttps://riunet.upv.es/handle/10251/130892reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengJapan Society for the Promotion of Science https://doi.org/10.13039/501100001691 JP17H06156open accesshttp://purl.org/coar/access_right/c_abf2Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/1308922026-06-13T07:49:27Z
dc.title.none.fl_str_mv In-situ spectroscopy and two-color thermography during microwave irradiation in materials processing
title In-situ spectroscopy and two-color thermography during microwave irradiation in materials processing
spellingShingle In-situ spectroscopy and two-color thermography during microwave irradiation in materials processing
Fukushima, Jun
Energy Production by Microwaves
Microwave CVD
EM Modelling
Microwave Material interaction
Dielectric Properties
Dielectric Properties Measurement
Solid State Microwave
Microwave Processing
Microwave Chemistry
Microwave applicators design
title_short In-situ spectroscopy and two-color thermography during microwave irradiation in materials processing
title_full In-situ spectroscopy and two-color thermography during microwave irradiation in materials processing
title_fullStr In-situ spectroscopy and two-color thermography during microwave irradiation in materials processing
title_full_unstemmed In-situ spectroscopy and two-color thermography during microwave irradiation in materials processing
title_sort In-situ spectroscopy and two-color thermography during microwave irradiation in materials processing
dc.creator.none.fl_str_mv Fukushima, Jun
Takizawa, Hirotsugu
author Fukushima, Jun
author_facet Fukushima, Jun
Takizawa, Hirotsugu
author_role author
author2 Takizawa, Hirotsugu
author2_role author
dc.contributor.none.fl_str_mv Japan Society for the Promotion of Science
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv Energy Production by Microwaves
Microwave CVD
EM Modelling
Microwave Material interaction
Dielectric Properties
Dielectric Properties Measurement
Solid State Microwave
Microwave Processing
Microwave Chemistry
Microwave applicators design
topic Energy Production by Microwaves
Microwave CVD
EM Modelling
Microwave Material interaction
Dielectric Properties
Dielectric Properties Measurement
Solid State Microwave
Microwave Processing
Microwave Chemistry
Microwave applicators design
description [EN] Concentration of microwave E-field between material particles is considered to cause the enhancement of sintering1 and chemical reaction under microwave irradiation. For example, it is usually required 1700 °C to synthesize AlN by carbothermal reduction method using Al2O3 as a starting material, but microwave processing can proceed this process at 1200 °C2. To understand this phenomenon, it is necessary to understand an occurrence behavior of plasma and a chemical reaction related to radical species generated by a local E-field concentration. In addition, in material synthesis using a raw material powder of several mm, it is suggested that a selective heating in the powder scale occurs. However, to discuss this selective heating behavior on this scale, it is necessary to realize a quantitative temperature measurement system with independent of the emissivity of the material and several mm spatial resolution. In this study, we conducted an in-situ spectroscopy and two-color thermography to verify these non-equilibrium effects during microwave irradiation. For example, in the iron making process, it was investigated that CN plasma was generated, and this CN radical contributed to the reduction reaction (Fig. 1(a))3. In addition, the developed two-dimensional two-color thermography system with a high resolution of 8.8 mm/pixel was enable to discuss local temperature gradients quantitatively (Fig. 1(b)).
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-10-15
dc.type.none.fl_str_mv book part
http://purl.org/coar/resource_type/c_3248
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/bookPart
format bookPart
dc.identifier.none.fl_str_mv https://riunet.upv.es/handle/10251/130892
url https://riunet.upv.es/handle/10251/130892
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Japan Society for the Promotion of Science https://doi.org/10.13039/501100001691 JP17H06156
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento - No comercial - Sin obra derivada (by-nc-nd)
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento - No comercial - Sin obra derivada (by-nc-nd)
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Editorial Universitat Politècnica de València
publisher.none.fl_str_mv Editorial Universitat Politècnica de València
dc.source.none.fl_str_mv reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname:Universitat Politècnica de València (UPV)
instname_str Universitat Politècnica de València (UPV)
reponame_str RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
collection RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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