Hydrothermal synthesis of K4Nb6O17

Satoshi Uchida, Yuichi Inoue, Yoshinobu Fujishiro, Tsugio Sato

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45 Citations (Scopus)


A new approach for the synthesis of K4Nb6O17·3H2O by hydrothermal method was examined using different alkaline solutions such as Nb2O5-KOH-NaOH-H2O, Nb2O5-KOH-NH4OH-H2O and Nb2O5-KOH-H2O. K4Nb6O17·3H2O was formed as single phase in Nb2O5-KOH-H2O system in the region of KOH concentration 1.0-1.5 m and temperature 220-285°C. KNbO3 was also formed as single phase in 3.0 m KOH solutions above 250°C. Addition of methanol was useful to decrease the particle size and increase the specific surface area of K4Nb6O17·3H2O.

Original languageEnglish
Pages (from-to)5125-5129
Number of pages5
JournalJournal of Materials Science
Issue number21
Publication statusPublished - 1998

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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