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Preparation method of porous CaCu3Ti4O12 film

A technology of calcium copper titanate and porous titanium, which is applied in the preparation of calcium copper titanate thin film materials and the field of preparing porous calcium calcium titanate titanate films, can solve the problem of low density, no obvious special structure in surface morphology, and can not meet the requirements of devices/equipment Light weight and other issues, to achieve the effect of adjustable aperture

Active Publication Date: 2018-01-05
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although CCTO has a high dielectric constant and can meet the needs of high-density energy storage, the CCTO materials prepared by the above method are all dense polycrystalline ceramics, and the surface morphology has no obvious special structure, which cannot meet the requirements of light weight devices / equipment. , low density requirements
At present, the preparation of porous films mostly adopts the method of template or organic polymer sphere filling, which needs to use corrosion or sintering to remove the template and filler, which increases the complexity of the process.

Method used

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  • Preparation method of porous CaCu3Ti4O12 film
  • Preparation method of porous CaCu3Ti4O12 film
  • Preparation method of porous CaCu3Ti4O12 film

Examples

Experimental program
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Effect test

Embodiment 1

[0018] a. Substrate selection and cleaning

[0019] Using heavily doped silicon substrate, the substrate was ultrasonically treated with ethanol and deionized water for 20 minutes, and then placed in a rapid heat treatment device for two-stage annealing: the first stage, the temperature was 200°C for 200s; the second stage, the temperature 200s at 400°C.

[0020] b. Preparation of lanthanum nickelate buffer layer

[0021] Weigh lanthanum nitrate La(NO 3 ) 3 ·6H 2 O solid 3.2 grams, take nickel acetate C according to the ratio of La:Ni atomic molar ratio 1:1 4 h 6 o 4 Ni·4H 2 O solid, add ethanol solvent, stir and heat in a water bath at 40°C for about 3 hours to obtain a homogeneous solution of lanthanum nickelate with a concentration of 0.1mol / L. Let it stand for a period of time, and it can be used without precipitation.

[0022] Place the cleaned silicon substrate in a homogenizer, set the speed at 4000 rpm, and use the above-mentioned lanthanum nickelate solution...

Embodiment 2

[0028] a. Substrate selection and cleaning

[0029] Quartz glass is used as the substrate. The substrate was sonicated with ethanol and deionized water for 20 minutes, and dried with high-purity nitrogen.

[0030] b. Preparation of lanthanum nickelate buffer layer

[0031] Fix the cleaned quartz glass substrate on the sample tray of the pulsed laser deposition system. The deposition chamber is evacuated to 10 -5 Below Pa; Oxygen with a purity of not less than 99.999% is introduced, and the chamber pressure is maintained at 5Pa; the sample tray is heated to 700 o C. Pulse laser ablation of the lanthanum nickelate target material, the laser frequency is 5Hz; after the laser is turned off, the oxygen pressure in the cavity is increased to 100Pa, and the temperature is kept for 30 minutes to obtain a lanthanum nickelate buffer layer with a thickness of about 10 nm.

[0032] c. Configuration of copper calcium titanate precursor solution

[0033] Calcium nitrate Ca(NO 3 ) 2 ,...

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Abstract

The invention discloses a method for preparing a porous copper calcium titanate CaCu3Ti4O12 (abbreviated as CCTO) thin film. The method uses lanthanum nickelate LaNiO3 (abbreviated as LNO) as a buffer layer, and adopts a solution chemical method to coat on a substrate covered with LNO. CCTO wet film; through heat treatment, a CCTO film with a porous structure is obtained. The invention does not need a template, and can prepare a CCTO film material with a porous structure on the surface under low-cost process conditions, and has broad application prospects in the fields of porous ceramics, high-density energy storage, and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic materials, and in particular relates to a method for preparing a copper calcium titanate thin film material, which refers to a method for preparing porous copper calcium titanate thin films on various substrates by a solution chemical method. technical background [0002] The development of porous ceramics began in the 1870s, and they were only used as bacteria filtration and uranium purification materials in the early stage. With the continuous improvement of the material preparation level and the diversification of the process, various new materials and high-performance porous ceramic materials are emerging, and their application fields and scope are also expanding and developing. Porous ceramics have the characteristics of high temperature resistance, corrosion resistance and good thermal stability due to the bonding of covalent bonds and complex ionic bonds and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/462C04B35/622C04B41/50C03C17/22
Inventor 李亚巍陈栋褚君浩
Owner EAST CHINA NORMAL UNIV
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