Fabrication plate-like BaBi₄Ti₄O15 single-crystalline particles by the molten salt synthesis method

Abstract

Plate-like single-crystalline BaBi4Ti4O[Formula: see text] particles were synthesized by the molten salt synthesis (MSS) method. The effects of sintering temperature, holding time, and NaCl–KCl molten salt content on the phase structure and morphology of plate-like BaBi4-Ti4O[Formula: see text] particles were investigated. The results show that plate-like BaBi4Ti4O[Formula: see text] particles can be synthesized when the sintering temperature is above 800[Formula: see text]C. The size of particles increases with increasing sintering temperature and molten salt content. Largely anisotropic plate-like BaBi4Ti4O[Formula: see text] particles with diameter [Formula: see text]10[Formula: see text]m and thickness of [Formula: see text]0.3 [Formula: see text]m can be obtained under the optimum process parameters. The crystal structure of BaBi4Ti4O[Formula: see text] was determined as A21am by TEM, which should be attributed to the Bi[Formula: see text] and Ba[Formula: see text] diffusing into [TiO6] octahedrons.

Vibrational study to analyze the A‐site cation disordering in four‐layered Aurivillius oxides ABi4Ti4O15 (ACa, Sr, Ba)

“…The crystal structure and symmetry of these complexes are influenced by the valence and ionic radii of the cations, resulting in alterations when different cations are inserted into the A‐sites. These changes significantly impact the crystal's structural characteristics, as well as its dielectric and ferroelectric properties 4–18 …”

“…These changes significantly impact the crystal's structural characteristics, as well as its dielectric and ferroelectric properties. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Numerous studies in the literature have reported the structural refinement of four-layered BLSF, particularly SrBi4Ti4O15 (SBT), CaBi4Ti4O15 (CBT), and BaBi4-Ti4O15 (BBT). 5,9,10,12 Raman spectra have been reported by some groups, 1,8,11,13,16,17 and a limited number of groups have presented IR spectra.…”

Enhanced Electrical Conductivity of (001) Oriented Sr0.9La0.1TiO3 Microplatelets for Thermoelectric Applications

“…Anisotropic two-dimensional perovskite-type particles have been drawing widespread attention because of their distinctive size- and shape-dependent characteristics and multifunctional applications such as piezoelectric, energy storage, photocatalytic activity, thermoelectric, electronic conductivity, and high dielectricity. – Due to the close correlation and sensitivity between the desired functionality of microplatelets and their crystallographic structure, crystallinity, morphology, and orientation, controlling these features are crucial for remarkablely optimizing their performance. Layered crystallographic structures, such as Ruddlesden–Popper Sr 3 Ti 2 O 7 , Aurivillius Bi 4 Ti 3 O 12 , SrBi 4 Ti 4 O 15 , CaBi 4 Ti 4 O 15 , PbBi 4 Ti 4 O 15 , BaBi 4 Ti 4 O 15 , Sr 2 Bi 4 Ti 5 O 18 , and Bi 2 SrTa 2 O 9 , can be easily formed due to their high lattice anisotropy to forming high-quality flaky microcrystals. For the perovskite-structured microplatelets, it is more difficult to maintain these particles growing along certain specific crystallographic directions because of their high structural symmetry with the isotropic crystallographic orientation under conventional conditions.…”