Study the Raman Spectra and Dielectric Properties of Hexagonal BaTi_1-xGa_xO₃Ceramics

The dielectric property and phase transition of Sr‐doping effect of Ba1−xSrxTi0.9Mn0.1O3‐δ ceramic

“…The room-temperature Q xf values were measured using the TE 011 resonant cavity method with a vector network analyzer (Anritsu, MS46122A) between 1 and 5 GHz. Pure h-BaTiO 3 phonon modes such as E 2g (152 and 423/cm) and A 1g (105 and 636/cm) modes, 17 and pure t-BaTiO 3 phonon modes such as A 1g (514 and 682/ cm) and E 1g (296/cm) modes of the t-BaTiO 3 sample were observed. The grain size of samples is decreasing with Sr doping amount increasing, which is due to grain refinement.…”

“…12 The Raman spectra of the samples at room temperature are shown in Figure 3. Pure h-BaTiO 3 phonon modes such as E 2g (152 and 423/cm) and A 1g (105 and 636/cm) modes, 17 and pure t-BaTiO 3 phonon modes such as A 1g (514 and 682/ cm) and E 1g (296/cm) modes of the t-BaTiO 3 sample were observed. 18 The Raman spectra of the samples with lower dopant contents exhibited a dominant hexagonal phonon mode, whereas the samples with higher amounts of dopant (x > 1%) showed dual phonon modes, which is consistent with the powder XRD patterns.…”