Method for synthesis of strontium-barium titanate nanotubes

A technology for synthesizing barium strontium titanate and barium strontium titanate, which is applied in the fields of filament/thread forming, textile and paper making, fiber treatment, etc., to achieve the effect of low cost and high sample purity

Inactive Publication Date: 2014-01-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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,

Method used

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  • Method for synthesis of strontium-barium titanate nanotubes
  • Method for synthesis of strontium-barium titanate nanotubes
  • Method for synthesis of strontium-barium titanate nanotubes

Examples

Experimental program
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Embodiment 1

[0026] 1. Configure the spinning solution, first prepare the core layer spinning solution, add a certain amount of PVP to DMF (the ratio of PVP to DMF mass is 1:2), and use a magnetic stirrer to continuously stir at room temperature for 1 hour. Stirring speed is 300 revs / min, then under the condition of room temperature, leave standstill 1h, obtain PVP / DMF core layer spinning solution; Next prepare shell layer spinning solution, press Ba element, Sr element, Ti element molar ratio to be 0.6: Weigh a certain amount of Ba(COOH) at a ratio of 0.4:1 2 、Sr(COOH) 2 and C 16 h 36 o 4 Ti, then Ba(COOH) 2 、Sr(COOH) 2 Add it into glacial acetic acid (the mass ratio of salt to acetic acid is 1:5), stir continuously at 80° C. for 10 minutes with a magnetic stirrer, and the stirring speed is 300 rpm, and then stand at room temperature for 1 h to obtain the A set of solutions, the C 16 h 36 o 4 Ti is added in acetylacetone (C 16 h 36 o 4 The ratio of Ti to the mass of acetylacet...

Embodiment 2

[0035] 1. Configure the spinning solution, first prepare the core layer spinning solution, add a certain amount of PVP to DMF (the ratio of PVP to DMF mass is 1; 2.5), and use a magnetic stirrer to continuously stir at room temperature for 2 hours. Stirring speed is 350 revs / min, then leaves standstill 2h under the condition of room temperature, obtains PVP / DMF core layer spinning solution; Next prepare shell layer spinning solution, be 0.6 by Ba element, Sr element, Ti element mol ratio: 0.4:1 Weigh a certain amount of Ba(COOH) respectively 2 、Sr(COOH) 2 and C 16 h 36 o 4 Ti, then Ba(COOH) 2 、Sr(COOH) 2 Add it into glacial acetic acid (the mass ratio of salt to acetic acid is 1:6), stir continuously at 80°C for 10 minutes with a magnetic stirrer, the stirring speed is 300 rpm, and then stand at room temperature for 1h to obtain the A set of solutions, the C 16 h 36 o 4 Ti is added in acetylacetone (C 16 h 36 o 4 The ratio of Ti to acetylacetone mass is 1: 2.5), co...

Embodiment 3

[0039] 1. Configure the spinning solution, first prepare the core layer spinning solution, add a certain amount of PVP to DMF (the ratio of PVP to DMF mass is 1:2.5), and use a magnetic stirrer to continuously stir at room temperature for 2 hours. The stirring speed is 400 rev / min, and then stand at room temperature for 2h to obtain the PVP / DMF core layer spinning solution; secondly, the shell layer spinning solution is prepared, and the molar ratio of Ba element, Sr element, and Ti element is 0.5; Weigh a certain amount of Ba(COOH) at a ratio of 0.5:1 2 、Sr(COOH) 2 and C 16 h 36 o 4 Ti, then Ba(COOH) 2 、Sr(COOH) 2 Add it into glacial acetic acid (the mass ratio of salt to acetic acid is 1:8), stir continuously at 80°C for 10 minutes with a magnetic stirrer, the stirring speed is 300 rpm, and then stand at room temperature for 1h to obtain the A set of solutions, the C 16 h 36 o 4 Ti is added in acetylacetone (C 16 h 36 o 4 The ratio of Ti to acetylacetone mass is ...

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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 ...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01D5/00D01D5/34
Inventor 翟继卫刘少辉汪金文沈波
Owner TONGJI UNIV
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