Temperature and time dependence of phase formation of HgBa2Can-1CunO2(n+1)+δ superconductors

Ayako Yamamoto, Makoto Itoh, Atsushi Fukuoka, Seiji Adachi, Hisao Yamauchi, Keiichi Tanabe

研究成果: Article査読

11 被引用数 (Scopus)

抄録

We systematically studied the temperature and time dependence of phase formation of HgBa2Can-1CunO2(n+1)+δ [Hg-12(n-1)n, n = 1, 2, 3, 4] superconductors by a single step firing method. All samples were synthesized from high-purity HgO, BaO, CaO, and CuO in a sealed quartz tube. The phase formation of Hg-12(n - 1)n was examined by both x-ray diffraction (XRD) analysis and dc susceptibility measurement. A single-phase HgBa2CuO4+δ (Hg-1201) was obtained in a relatively wide temperature range (600-850 °C), while single-phase HgBa2CaCu2O6+8 (Hg-1212) and HgBa2Ca2Cu3O8+δ (Hg-1223) were obtained only in narrow temperature and time ranges for the synthesis. The optimum temperatures for Hg-1212 and Hg-1223 were found to be 665 and 710 °C, respectively, when the sintering time was fixed for about 50 h. The HgBa2Ca3Cu4O10+δ (Hg-1234) phase was obtained as a mixture with Hg-1223.

本文言語English
ページ(範囲)644-651
ページ数8
ジャーナルJournal of Materials Research
14
3
DOI
出版ステータスPublished - 1999 3
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

フィンガープリント

「Temperature and time dependence of phase formation of HgBa<sub>2</sub>Ca<sub>n</sub>-1Cu<sub>n</sub>O<sub>2</sub>(n+1)+δ superconductors」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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