Effect of Sr/Ba Ratio on Dielectric Properties of BSTN Ceramics

Formation and dielectric properties of Mn-Doped BSTN composite ceramics

“…That is to say that the crystal interplanar distance of the perovskite phase increased, while that of the tungsten bronze phase decreased as the addition of Mn increased. MnO 2 will be decomposed to Mn 2 O 3 and O 2 at 535 ℃ , and the Mn 2 O 3 will be stable until to 940 ℃ [6,7] . So, the Mn may be doped in BSTN composite ceramics in the form of Mn 3+ .…”

“…The peak of dielectric constant appeared between 160 ℃ and 360 ℃ for any of the samples is generated by the ferroelectric/paraelectric phase transition of the tungsten bronze phase [6] . The phase transition of the tungsten bronze phase will be affected by the perovskite phase [7] . With the content of MnO 2 increasing, the content of perovskite phase markedly increases, and the effects of perovskite phase on the phase transition of tungsten bronze phase increases too.…”