MISC

2014年12月1日

Synthesis of nano-sized perovskite-type oxide with the use of polyvinyl pyrrolidone

Journal of Asian Ceramic Societies
  • Tsukasa Nagai
  • ,
  • Naoko Fujiwara
  • ,
  • Masafumi Asahi
  • ,
  • Shin-Ichi Yamazaki
  • ,
  • Zyun Siroma
  • ,
  • Tsutomu Ioroi

2
4
開始ページ
329
終了ページ
332
記述言語
英語
掲載種別
速報,短報,研究ノート等(学術雑誌)
DOI
10.1016/j.jascer.2014.08.004
出版者・発行元
Elsevier B.V.

A new easy-to-use process for obtaining fine powders of lanthanum-based perovskite-type oxides (La1-xAexMO3: Ae=Ca, Sr, M=Mn, Co, Fe) with a high specific surface area was successfully developed by the use of polyvinyl pyrrolidone (PVP) as a dispersant. This approach made it possible to prepare a single phase of perovskite by calcining at a lower temperature (600°C) compared to conventional synthetic processes such as a solid state reaction and citrate process. SEM observations revealed that the oxide prepared with PVP was ca. 20-30nm in size, while those prepared by the citrate process and solid state reaction were ca. 50nm and 1μm, respectively. Furthermore, the results of a thermal analysis in which we heated the precursors for the different reactions support the idea that PVP plays an important role in the formation of the perovskite phase at low temperature.

リンク情報
DOI
https://doi.org/10.1016/j.jascer.2014.08.004

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