Crystal structure of dense nanocrystalline BaTiO3 ceramics

Structural characterization of barium titanate–cobalt ferrite composite powders

“…1a, were characteristic of t-BaTiO 3 as evidenced by the vibrational modes at around 257, 306, 520, 720 cm À1 (Table 1). Both spectra exhibited a small peak at 183 cm À1 that could be ascribed to lattice defects or small amounts of orthorhombic phase [17,18]. Sample B9 showed an interesting feature at 640 cm À1 which might be assigned to hexagonal BaTiO 3 [19,20].…”

Effect of Sr Substitution on Structure and Thermal Diffusivity ofBa1-xSrxTiO3 Ceramic

“…Barium titanate, perovskite structure, is widely used in many applications. When Ba 2+ ions in BaTi0 3 are partially replaced by Sr 2+ , the electronic and optical properties of solid solution Ba l−x Sr x TiO 3 (BST) can be tailored over a broad range with a molar ratio 0≤x≤1 [1,2] . By varying the value of x, it is possible to obtain a specific property that can be used in various electroceramic applications, such as electronic, piezoelectric transducer, pyroelectric detector, thermal application and some electro-optical devices [2] .…”

Erratum: Fabrication of Ca, Zr doped BaTiO3 ferroelectric nanofibers by electrospinning

“…BCTZ ceramics shows maximum polarization P max = 13 μC/cm 2 at E = 3 kV/mm, remnant polarization P r = 6.2 μC/cm 2 and coercive field E c = 430 V/mm. Figure 4 shows Raman spectra of the electrospun nanofibers calcined at 700 o C and bulk ceramic sample sintered at 1450 o C. Peaks at 260, 306, 520, and 720 cm -1 correspond to the BaTiO 3 tetragonal phase [9][10][11][12][13] whereas a low intensive band around 181 cm -1 is assigned to an A 1 (LO) optical mode in rhombohedral phase in crystallized samples [13]. Comparing Raman spectra of nanofibers and bulk BCTZ, we found Raman peaks at 518 and 718 cm -1 for bulk ceramics shift, respectively, to 523 and 724 cm -1 in nanofibers.…”