Process, fundamental and application of one-step molten-salt synthezed BaTi2O5 nanorods

摘要

A large number of BaTi2O5 (BT2) nanorods were prepared by a one-step molten-salt synthesis (MSS). X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM) confirmed the BT2 structure and morphology. High-resolution transmission electron microscope (HRTEM) and selected area electron diffraction (SAED) demonstrated the nanorods are the single crystalline with a growth direction of [001] of monoclinic BT2. Optimizing experiment conditions including of the weight ratios of the mixture to KCl, holding times, the molar ratios of raw materials and calcination temperatures achieved BT2 nanorods with uniform morphology at 950 degrees C for 4 h. Based on this experimental results, the BT2 potential formation and growth mechanisms were further proposed. Finally, nanocomposites filled with nanorods were fabricated to test electrical properties, and the relative permittivity of composite filled with 70 wt% is up to 62 at 1 MHz, reaching 17 times as much as the pure epoxy resin (EP). (C) 2020 Elsevier B.V. All rights reserved.