abstract
The effect of Nb and Mn as dopants on the dielectric properties of BaTiO3 based ceramics was investigated. When the content of Nb <1.0% mol (Mn =1.6% mol), a diffuse phase transition (DFT) character appeared, and a normal-like ferroelectrics character was observed as the content of Nb is 1.0% mol. When the content of Nb increases up to 1.1% mol, it showed a dielectric relaxation. The binding energy for different defect associations [] and [
] calculated using computer simulation techniques and the dielectric properties related to polar nanoregions (PNRs) were discussed.
Funding
The work was supported by the Chunhui Project of the Education Ministry of China [grant number Z2011077]; the National Natural Science Foundation of China [grant numbers 11074203, 51279172]; the Project of Sichuan Provincial Department of Education [grant number 14ZB0126].