Author/Authors :
Buscaglia، نويسنده , , V. and Buscaglia، نويسنده , , M.T. and Viviani، نويسنده , , M. and Ostapchuk، نويسنده , , T. and Gregora، نويسنده , , I. and Petzelt، نويسنده , , J. and Mitoseriu، نويسنده , , L. and Nanni، نويسنده , , P. and Testino، نويسنده , , A. and Calderone، نويسنده , , R. and Harnagea، نويسنده , , C. and Zhao، نويسنده , , Z. and Nygren، نويسنده , , M.، نويسنده ,
Abstract :
Dense nanocrystalline BaTiO3 (BT) ceramics with grain sizes (GSs) below 100 nm obtained by spark plasma sintering (SPS), were investigated by micro-Raman spectroscopy in order to obtain information about the changes in the local order induced by size effects. The obtained spectra in the range 80–700 K showed the presence of all the crystalline phases of BaTiO3, even in the finest structure (50 nm grain size ceramic), with particularities attributed to the high density of non-ferroelectric grain boundaries. The AFM piezoresponse study incontestably proved the ferroelectric switching at local scale in nanocrystalline BaTiO3 ceramics at room temperature.
Keywords :
grain size , spark plasma sintering , Ferroelectric properties , BaTiO3
