Electrical conductivity of ceria-based oxide under 24 GHz millimeter-wave heating in varying thermal environments

Salmie Suhana Binti Che Abdullah, Takasi Teranisi, Hidetaka Hayashi, Akira Kishimoto

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Sm-doped CeO2 ceramics were prepared by conventional solid state method. The electrical conductivity of the samples was measured under conventional heating and 24 GHz millimeter-wave (MMW) heating, and the results were compared. During MMW heating, 5 mol% Sm-doped CeO2 pellets with different thickness were used as susceptors, meanwhile Al2O3 fiber board was used as thermal insulator and its design varies by the number of open channels. The aforementioned susceptors and thermal insulators dependency of conductivity values during MMW heating were studied. Conductivity of samples under MMW heating was found to be higher than under conventional heating. Results showed that the different susceptor thickness and thermal insulator design could result in different conductivity values. These results were attributed to the phenomenon of heat dissipation from surface and the amount of direct radiation reached the sample. Specific susceptor thickness and specific insulator design which leads to highest conductivity were identified. By combining these two effects, the largest enhancement of conductivity of ceria based ceramics was obtained.

Original languageEnglish
Pages (from-to)663-667
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume63
Issue number7
Publication statusPublished - 2016

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Cerium compounds
Millimeter waves
Oxides
Heating
Heat losses
Hot Temperature
Electric Conductivity
Radiation
Fibers

Keywords

  • Ceria
  • Electrical conductivity
  • Millimeter-wave
  • Solid electrolyte

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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title = "Electrical conductivity of ceria-based oxide under 24 GHz millimeter-wave heating in varying thermal environments",
abstract = "Sm-doped CeO2 ceramics were prepared by conventional solid state method. The electrical conductivity of the samples was measured under conventional heating and 24 GHz millimeter-wave (MMW) heating, and the results were compared. During MMW heating, 5 mol{\%} Sm-doped CeO2 pellets with different thickness were used as susceptors, meanwhile Al2O3 fiber board was used as thermal insulator and its design varies by the number of open channels. The aforementioned susceptors and thermal insulators dependency of conductivity values during MMW heating were studied. Conductivity of samples under MMW heating was found to be higher than under conventional heating. Results showed that the different susceptor thickness and thermal insulator design could result in different conductivity values. These results were attributed to the phenomenon of heat dissipation from surface and the amount of direct radiation reached the sample. Specific susceptor thickness and specific insulator design which leads to highest conductivity were identified. By combining these two effects, the largest enhancement of conductivity of ceria based ceramics was obtained.",
keywords = "Ceria, Electrical conductivity, Millimeter-wave, Solid electrolyte",
author = "Abdullah, {Salmie Suhana Binti Che} and Takasi Teranisi and Hidetaka Hayashi and Akira Kishimoto",
year = "2016",
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journal = "Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy",
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TY - JOUR

T1 - Electrical conductivity of ceria-based oxide under 24 GHz millimeter-wave heating in varying thermal environments

AU - Abdullah, Salmie Suhana Binti Che

AU - Teranisi, Takasi

AU - Hayashi, Hidetaka

AU - Kishimoto, Akira

PY - 2016

Y1 - 2016

N2 - Sm-doped CeO2 ceramics were prepared by conventional solid state method. The electrical conductivity of the samples was measured under conventional heating and 24 GHz millimeter-wave (MMW) heating, and the results were compared. During MMW heating, 5 mol% Sm-doped CeO2 pellets with different thickness were used as susceptors, meanwhile Al2O3 fiber board was used as thermal insulator and its design varies by the number of open channels. The aforementioned susceptors and thermal insulators dependency of conductivity values during MMW heating were studied. Conductivity of samples under MMW heating was found to be higher than under conventional heating. Results showed that the different susceptor thickness and thermal insulator design could result in different conductivity values. These results were attributed to the phenomenon of heat dissipation from surface and the amount of direct radiation reached the sample. Specific susceptor thickness and specific insulator design which leads to highest conductivity were identified. By combining these two effects, the largest enhancement of conductivity of ceria based ceramics was obtained.

AB - Sm-doped CeO2 ceramics were prepared by conventional solid state method. The electrical conductivity of the samples was measured under conventional heating and 24 GHz millimeter-wave (MMW) heating, and the results were compared. During MMW heating, 5 mol% Sm-doped CeO2 pellets with different thickness were used as susceptors, meanwhile Al2O3 fiber board was used as thermal insulator and its design varies by the number of open channels. The aforementioned susceptors and thermal insulators dependency of conductivity values during MMW heating were studied. Conductivity of samples under MMW heating was found to be higher than under conventional heating. Results showed that the different susceptor thickness and thermal insulator design could result in different conductivity values. These results were attributed to the phenomenon of heat dissipation from surface and the amount of direct radiation reached the sample. Specific susceptor thickness and specific insulator design which leads to highest conductivity were identified. By combining these two effects, the largest enhancement of conductivity of ceria based ceramics was obtained.

KW - Ceria

KW - Electrical conductivity

KW - Millimeter-wave

KW - Solid electrolyte

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