受賞記念講演:平成 29 年度研究功績賞ミリ波照射下でのイオン移動の選択的促進を利用したセラミックスの新規機能発現

Translated title of the contribution: Exploring of Novel Functions in Ceramics Utilizing Some Selective Improvements of Ion Movement under Millimeter-wave Irradiation

Research output: Contribution to journalArticle

Abstract

By using the millimeter-wave or a kind of microwaves with short wave length, fabrication of ceramics with uniform morphology and examples of low temperature rapid sintering have been reported. Since the sintering progresses from the interior even with the rapid temperature increasing, it has been found that pores do not easily remain in the interior even if pressure sintering is performed afterwards, and the thermal conductivity of the heat radiation substrate is improved. We also reported diffusion promotion of cations which seems to contribute to the short-time sintering. We found zirconia ceramics having a composition which is easy to process using its plastic deformation during millimeter-wave heating and has creep resistance at elevated temperature with conventional heating. We have found improvement of oxide ion conductivity under irradiation with millimeter-waves in various added zirconia, ceria and LaGaO 3 based ceramics and improvement of power generation properties of solid oxide fuel cells using these materials as an electrolyte. Improvement of mass transfer including diffusion was more pronounced in ion species with large millimetre-wave absorption, but it could not be explained by this alone, and comprehensively explained by non-thermal effect.

Original languageJapanese
Pages (from-to)73-79
Number of pages7
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume66
Issue number2
DOIs
Publication statusPublished - Feb 1 2019

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Millimeter waves
Sintering
Irradiation
Ions
Zirconia
Heating
Creep resistance
Cerium compounds
Heat radiation
Solid oxide fuel cells (SOFC)
Temperature
Oxides
Electrolytes
Power generation
Cations
Thermal conductivity
Plastic deformation
Mass transfer
Positive ions
Microwaves

ASJC Scopus subject areas

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

Cite this

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title = "受賞記念講演:平成 29 年度研究功績賞ミリ波照射下でのイオン移動の選択的促進を利用したセラミックスの新規機能発現",
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