Research Paper

Journal of Nanoparticle Research

, Volume 12, Issue 1, pp 209-215

Nano-powders of Na0.5K0.5NbO3 made by a sol–gel method

  • Anirban ChowdhuryAffiliated withInstitute for Materials Research, Houldsworth Building, University of Leeds Email author 
  • , Jonathan BouldAffiliated withInstitute for Materials Research, Houldsworth Building, University of Leeds
  • , Yifan ZhangAffiliated withInstitute for Materials Research, Houldsworth Building, University of Leeds
  • , Craig JamesAffiliated withInstitute for Materials Research, Houldsworth Building, University of Leeds
  • , Steven J. MilneAffiliated withInstitute for Materials Research, Houldsworth Building, University of Leeds

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Abstract

Sodium potassium niobate (NKN) nano-particle powders were synthesised through the thermal decomposition of a sol–gel NKN precursor. Powders and gels were characterised by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and transmission electron microscopy (TEM). Hydrated carbonate phases formed as a result of reaction with evolved vapours during organic decomposition, and by reaction of NKN powders with H2O and CO2 on exposure to air. The primary particle size of the powders increased from <50 to <250 nm as decomposition temperatures were raised from 500 to 950 °C.

Keywords

Nano-powders Sol–gel Sodium potassium niobate X-ray diffraction Fourier transform infrared spectroscopy Transmission electron microscopy Synthesis method