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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/1152

Title: Polymeric citrate precursor route to the synthesis of nano-sized barium lead titanates
Authors: Arya, P R
Jha, P
Subbanna, G N
Ganguli, A K
Keywords: Oxides
Chemical synthesis
X-ray diffraction
Dielectric properties
Issue Date: 2003
Citation: Materials Research Bulletin, 38(4), 617-628
Abstract: Monophasic oxides of the formula, Ba1−xPbxTiO3 (0≤x≤1.0) were obtained at temperatures close to 500 °C from polymeric precursors formed using citric acid and ethylene glycol. These oxides were found to be tetragonal for all values of x, the distortion increasing with Pb content. Differential scanning calorimetry (DSC) shows that the decomposition of the precursor to the oxides varies with composition and the decomposition temperature is highest (530 °C) for the x=0.5 composition. X-ray line broadening studies of 900 °C sintered samples show grain size of 50–54 nm in all compositions. TEM studies show agglomerated grains of the size, 40–60 nm. The dielectric constant () decreases with lead-doping having a value 70 for PbTiO3. The dielectric loss (D) for different compositions varied between 0.005 and 0.01 at 100 kHz. The dielectric constant and loss show excellent frequency stability.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/1152
Appears in Collections:Chemistry

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