Polymerized Complex Synthesis of Perovskite Lead Titanate at Reduced Temperatures: Possible Formation of Heterometallic (Pb,Ti)-Citric Acid Complex

Masato Kakihana, Toru Okubo, Momoko Arima, Osamu Uchiyama, Masatomo Yashima, Masahiro Yoshimura, Yoshiyuki Nakamura

研究成果: Article同行評審

62 引文 斯高帕斯(Scopus)

摘要

Perovskite PbTiO3 powders were prepared by a polymerized complex technique at relatively low temperatures, viz. 400-600°C. Heating of a mixed solution of citric acid (CA), ethylene glycol (EG), and Pb and Ti ions with a molar ratio of Pb/Ti/CA/EG = 1/1/10/40 at 130°C produced a yellowish transparent polymeric gel without any precipitation, which after pyrolysis at 300°C was converted to a powder precursor for PbTiO3. We suggest, based on the results of Raman and 13C NMR spectroscopies, that a heterometallic (Pb,Ti)-CA3 chelate complex formed in a starting Pb/Ti/CA/EG solution and it was thermally stable upon polymerization at 130°C. Chemical analyses showed no PbO loss during calcination of powder precursors at 400-700°C, which led to the conclusion that a solid-state reaction between isolated PbO and TiO2 particles was not responsible for PbTiO3 formation, but PbTiO3 formed directly by thermal decomposition of the powder precursor above 400°C.

原文English
頁(從 - 到)451-456
頁數6
期刊Chemistry of Materials
9
發行號2
DOIs
出版狀態Published - 1997 一月 1

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 化學工程 (全部)
  • 材料化學

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