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A kind of preparation method of orientation alignment barium titanate nanofiber

A technology for arranging barium titanate and nanofibers, applied in fiber processing, fiber chemical characteristics, spinning solution preparation, etc., can solve the problems of small aspect ratio of nanowires, uncontrollable mutual arrangement of nanowires, etc., and achieve industrialization potential Huge, good crystallinity, high purity effect

Inactive Publication Date: 2018-03-16
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aspect ratio of the nanowires obtained by the hydrothermal method is relatively small, and the mutual arrangement between the nanowires cannot be controlled.

Method used

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  • A kind of preparation method of orientation alignment barium titanate nanofiber
  • A kind of preparation method of orientation alignment barium titanate nanofiber
  • A kind of preparation method of orientation alignment barium titanate nanofiber

Examples

Experimental program
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Effect test

Embodiment 1

[0032] First, 2.55g of barium acetate was added to 8.0g of acetic acid, stirred at 25°C for 1h on a magnetic stirrer to fully dissolve, then 3.40g of tetrabutyl titanate was added, and stirred for 1h to form a precursor solution. Add 1.8 g of polyvinylpyrrolidone to 8 g of ethanol, and stir on a magnetic stirrer at 25° C. for 12 hours to form a homogeneous polymer solution. The above two solutions were mixed and stirred on a magnetic stirrer for 1 h to obtain a spinning solution.

[0033] Use a micro-injection pump to inject the electrospinning solution from the syringe for electrospinning. The anode of the high-voltage generator is connected to the end of the micro-injector, and the cathode is connected to the collection device, wherein: the collection device consists of an insulating substrate It is composed of two conductor collecting plates arranged longitudinally and parallelly on the insulating substrate. The conductor collecting plates are grounded. The distance between...

Embodiment 2

[0036] First, 1.275g of barium acetate was added to 8.0g of acetic acid, stirred at 25°C for 1h on a magnetic stirrer to fully dissolve, then 1.70g of tetrabutyl titanate was added, and stirred for 1h to form a precursor solution. Add 1.8 g of polyvinylpyrrolidone to 12 g of ethanol, and stir on a magnetic stirrer at 25° C. for 12 hours to form a homogeneous polymer solution. The above two solutions were mixed and stirred on a magnetic stirrer for 1 h to obtain a spinning solution.

[0037] Use a micro-injection pump to inject the electrospinning solution from the syringe for electrospinning. The anode of the high-voltage generator is connected to the end of the micro-injector, and the cathode is connected to the collection device, wherein: the collection device consists of an insulating substrate It is composed of a conductor collecting plate arranged longitudinally and parallelly on the insulating substrate, the conductor collecting plate is grounded, the distance between tw...

Embodiment 3

[0040] First, 1.275g of barium acetate was added to 10g of acetic acid, stirred at 25°C for 1h on a magnetic stirrer to fully dissolve, then 1.70g of tetrabutyl titanate was added, and stirred for 1h to form a precursor solution. Add 2 g of polyvinylpyrrolidone to 10 g of ethanol, and stir on a magnetic stirrer at 25° C. for 12 hours to form a homogeneous polymer solution. The above two solutions were mixed and stirred on a magnetic stirrer for 1 h to obtain a spinning solution.

[0041] Use a micro-injection pump to inject the electrospinning solution from the syringe for electrospinning. The anode of the high-voltage generator is connected to the end of the micro-injector, and the cathode is connected to the collection device, wherein: the collection device consists of an insulating substrate It is composed of a conductor collecting plate arranged longitudinally and parallelly on the insulating substrate. The conductor collecting plate is grounded. The distance between two c...

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Abstract

The invention relates to a preparing method for barium titanate nanofiber arrayed in an orientation mode. The preparing method includes the steps that a spinning solution is prepared; the electrostatic spinning solution is injected from an injector through a micro-injection pump to carry out electrostatic spinning, a positive pole of a high pressure generator is connected with the tail end of the injector, a negative pole is connected with conductor collecting plates in a collecting device, the collecting device is composed of an insulating substrate and the two conductor collecting plates arranged on the insulating substrate in parallel, the distance between the two conductor collecting plates is 5-30 mm, the length of the conductor collecting plate is 30-50 mm, the electrostatic spinning electric field intensity is controlled to be 0.5 kv / cm-2 kv / cm, the flow speed of the micro-injection pump is 0.1-0.5 ml / h, the spinning process is conducted at the temperature of 15 DEG C-25 DEG C, and an electrostatic spinning product is transversely collected between the two conductor collecting plates; the barium titanate nanofiber is obtained by conducting heat treatment on obtained barium titanate / polyvinylpyrrolidone compound fiber to remove polyvinylpyrrolidone. The barium titanate nanofiber which is good in crystallinity and high in purity and is of an orientation array structure can be obtained in a controllable mode.

Description

technical field [0001] The invention relates to a method for preparing orientation-arranged barium titanate nanofibers by using electrostatic spinning technology. Background technique [0002] Barium titanate (BTO) has excellent piezoelectric, dielectric and ferroelectric properties, so it has a wide range of applications in the field of microelectronics and optoelectronics, such as multilayer ceramic capacitors (MLCC), ferroelectric random access memory (FRAM ) and ferroelectric field effect transistor (FDRAM), etc. [0003] Currently, there are many methods for synthesizing barium titanate, including high-temperature solid-state sintering, sol-gel and hydrothermal synthesis. Generally speaking, it can be divided into two categories: solid-phase method and liquid-phase method. The solid-phase sintering method refers to the method of mixing the solid reaction raw materials according to the proportion, grinding them to pulverize and mixing them uniformly, and then reacting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/10D01F9/08D01D1/02D01D5/00
CPCD01D1/02D01D5/003D01D5/0076D01F9/08D01F9/10
Inventor 王庆李泽宇
Owner WUHAN UNIV OF TECH
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