The synthesis of new bismuth basic nitrate complex oxides by the soft processing (II) - α - Bi2O3-HNO3-H2O system

Yuji Nishio, Koji Amezawa, Masayoshi Horibe, Naoichi Yamamoto

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The formation diagram of α-Bi2O3-HNO3-H2O system was studied using hydrothermal or "wet" method. Three kinds of compound of bismuth basic nitrate complex oxides were separated as single phases and determined their chemical compositions. The existence of these phases was previously found by XRD measurements, although those phases have been obtained only as mixture of multi phases precipitates. The new compounds have the chemical composition of Bi2(NO3)O2(OH)·7H2O, Bi2(NO3)O2(OH)·H2O, and Bi4(NO3)O2(OH)7, respectively. At the same reaction conditions of temperature (above 60°C) and pH in the α-Bi2O3-HNO3H2O system and the BiONO3-KOH-H2O systems, it was affirmed that the same kind of precipitates were formed regardless of the kind of starting reagents.

Original languageEnglish
Pages (from-to)1082-1088
Number of pages7
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Issue number12
Publication statusPublished - 2002 Dec
Externally publishedYes


  • Bi(NO)O (OH)
  • Bi(NO)O(OH)· 7HO
  • Bi(NO)O(OH)· HO
  • Hydrothermal method
  • New bismuth basic nitrate complex oxides
  • α-BiO-HNO-HO system

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry


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