TY - GEN
T1 - In-situ spectroscopy and two-color thermography during microwave irradiation in materials processing
AU - Fukushima, J.
AU - Takizawa, H.
N1 - Funding Information:
This work was supported by a JSPS Grant-in-Aid for Scientific Research (S) No. JP17H06156.
Publisher Copyright:
© Editorial Universitat Politecnica de Valencia, 2019.
PY - 2019
Y1 - 2019
N2 - In ?-Fe2O3 + C system, a plasma discharge (such as CN and N2) during microwave E-field irradiation and local temperature distribution is are investigated by using in situ emission spectroscopy device and high-resolution two-color thermography. The time development of excited plasma in E-field irradiation demonstrate that excited N2, C and CN were observed at first but CN excitation was sustained at least 3 seconds. In microwave H-field irradiation, -Fe2O3 powders were selectively heated compared to carbon. Excited CN results in enhancement of the reduction reaction in addition to thermal reduction in E-field irradiation, and selective heating of -Fe2O3 suggests a reduction reaction proceeds in thermally non-equilibrium condition in H-field irradiation.
AB - In ?-Fe2O3 + C system, a plasma discharge (such as CN and N2) during microwave E-field irradiation and local temperature distribution is are investigated by using in situ emission spectroscopy device and high-resolution two-color thermography. The time development of excited plasma in E-field irradiation demonstrate that excited N2, C and CN were observed at first but CN excitation was sustained at least 3 seconds. In microwave H-field irradiation, -Fe2O3 powders were selectively heated compared to carbon. Excited CN results in enhancement of the reduction reaction in addition to thermal reduction in E-field irradiation, and selective heating of -Fe2O3 suggests a reduction reaction proceeds in thermally non-equilibrium condition in H-field irradiation.
KW - High spatial resolution
KW - In-situ measurement
KW - Microwave selective heating
KW - Plasma exciting
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U2 - 10.4995/Ampere2019.2019.9882
DO - 10.4995/Ampere2019.2019.9882
M3 - Conference contribution
AN - SCOPUS:85075434060
T3 - AMPERE 2019 - 17th International Conference on Microwave and High Frequency Heating
SP - 373
EP - 377
BT - AMPERE 2019 - 17th International Conference on Microwave and High Frequency Heating
A2 - Banos, Beatriz Garcia
PB - American Society for Precision Engineering, ASPE
T2 - 17th International Conference on Microwave and High Frequency Heating, AMPERE 2019
Y2 - 9 September 2019 through 12 September 2019
ER -