Influence of La2O3 addition on thermophysical properties of ZrO2-4 mol%Y2O3 ceramics fabricated by spark plasma sintering

Byung Koog Jang*, Seongwon Kim, Yoon Suk Oh, Hyung Tae Kim, Yoshio Sakka, Hideyuki Murakami

*この研究の対応する著者

研究成果: Article査読

8 被引用数 (Scopus)

抄録

The influence of La2O3 addition on the thermal diffusivity and thermal conductivity of ZrO2 ceramics has been investigated. Porous and dense ZrO2 ceramics were fabricated by spark plasma sintering at 1100 and 1500°C. The porosity of ZrO2 ceramics sintered at 1100°C increased with increasing 05 mol% La 2O3 addition. In contrast, ZrO2 ceramics sintered at 1500°C showed full density regardless of the amount of La 2O3 addition. The La2Zr2O 7 of crystalline pyrochlore phase was formed by reaction between La2O3 and ZrO2. The XRD peak of the La 2Zr2O7 phase increased with increasing La 2O3 addition. The thermal diffusivity and thermal conductivity of sintered ZrO2 decreased with increasing La 2O3 addition. In addition, the thermal conductivity of the present samples decreased remarkably with increasing the porosity.

本文言語English
ページ(範囲)929-932
ページ数4
ジャーナルJournal of the Ceramic Society of Japan
119
1396
DOI
出版ステータスPublished - 2011 12月
外部発表はい

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学

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