Method for synthesis of strontium-barium titanate nanotubes

Abstract

The invention relates to a method for synthesis of strontium-barium titanate nanotubes. PVP is added into DMF to form a core-layer spinning solution; Ba(COOH)2 and Sr(COOH)2 are added into glacial acetic acid to obtain a first mixture, C16H36O4Ti is added into acetylacetone to obtain a second mixture, then PVP is added into alcohol to obtain a third mixture, and the three mixtures are mixed to form a shell-layer spinning solution; the prepared core-layer spinning solution is added into an inner tube, the shell-layer spinning solution is added into an outer tube, two truncated syringe needles with different diameters are sheathed together to form a coaxial two-layer spinneret, and an static electricity spinning method is adopted for spinning. The prepared product has a core-layer @ shell-layer structure, the core layer is PVP, the shell layer is PVP / [Ba(COOH)2+Sr(COOH)2+C16H36O4Ti), after sintering, PVP is volatilized at the high temperature, and the strontium-barium titanate nanotubes with the outer diameter of 200-400 nm, the inner diameter of 50-100 nm and the length of 10-100 [mu]m are formed. Compared with the prior art, the method has the advantages of being simple and feasible to implement, low in cost, convenient and fast, high in purity of the prepared sample, and can used for large scale production.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, and in particular relates to a method for synthesizing barium strontium titanate nanotubes. Background technique [0002] Barium strontium titanate is a typical perovskite-type ferroelectric, which has spontaneous polarization, and the direction of spontaneous polarization can be reversibly rotated with the applied electric field. At the same time, barium strontium titanate also has excellent piezoelectricity, Pyroelectric performance, large nonlinear optical coefficient and dielectric constant make it exhibit in many fields such as storage elements, piezoelectric response scanning probe microscopes, infrared thermal imaging cameras, nonlinear optical devices, capacitors, ultrasonic generators, etc. broad application prospects. [0003] With the miniaturization of electronic components, the synthesis and performance research of barium strontium titanate nanomaterials ...

AI Technical Summary

Problems solved by technology

Many people prepared barium strontium titanate nanofibers by electrospinning [P.Hu, Y.Song, H.Liu, Y.Shen, Y.Lin, C.W.Nan. Largely enhanced energy density in flexible P(VDF-TrFE )nanocomposites by surface-modified electrospun BaSrTiO 3 fiber, J.Mater.Chem.A, 2013, 1, 1688-1693.Y.Song, Y.Shen, P / Hu, Y.Lin, M.Li, C.W.Nan, Significant enhancement in energy density of polymer composites induced by dopamine-modified Ba 0.6 Sr 0.4 TiO 3 nanofibers, Appl.Phys.Lett., 2012, 101: 152904], but there are few reports on the preparation of barium strontium titanate nanotubes by electrospinning

Images