Method for realizing coercive field reduction and pressure resistance improvement of sodium bismuth titanate-based film

A technology of sodium bismuth titanate base and coercive field is applied in the field of reducing the coercive field of sodium bismuth titanate base film and improving its pressure resistance, which can solve the problems of large coercive field of the base film, and achieve low coercive field. , Strong pressure resistance, the effect of improving electrical performance

Inactive Publication Date: 2015-04-08
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the Na 0.5 Bi 0.5 TiO 3 The problem of large coercive field of the base film

Method used

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  • Method for realizing coercive field reduction and pressure resistance improvement of sodium bismuth titanate-based film
  • Method for realizing coercive field reduction and pressure resistance improvement of sodium bismuth titanate-based film
  • Method for realizing coercive field reduction and pressure resistance improvement of sodium bismuth titanate-based film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) According to Na 0.5 Bi 0.5 Ti 0.995 mn 0.005 o 3-δ The stoichiometric ratio, accurately weighed 0.1673g of CH 3 COONa (excess 1%), 1.0191g of Bi(NO 3 ) 3 ·5H 2 O (excess 4%), 0.0050g of C 4 h 6 MnO 4 4H 2 O and the polyethylene glycol 20000 of 0.25g, standby. Accurately measure 1.38ml of acetylacetone in a beaker, then measure 1.38ml of tetra-n-butyl titanate dropwise into acetylacetone, stir on a magnetic stirrer for 4 hours to complete the chelation of titanium, defined as solution 1 . The weighed CH 3 COONa, Bi(NO 3 ) 3 ·5H 2 O, C 4 h 6 MnO 4 4H 2 O was added to a beaker containing 10 ml of ethylene glycol and heated and stirred at 40° C. until all dissolved, which was defined as solution 2. Add the weighed polyethylene glycol 20000 into a beaker filled with 5ml of glacial acetic acid, heat and stir at 50°C until it is completely dissolved, which is defined as solution 3. After all the solutions were cooled, solutions 2 and 3 were slowly add...

Embodiment 2

[0036] (1) According to Na 0.5 Bi 0.5 Ti 0.99 mn 0.01 o 3-δ The stoichiometric ratio, accurately weighed 0.3347g of CH 3 COONa (1 % in excess), 2.0775 g of Bi(NO 3 ) 3 ·5H 2 O (excess 6%), 0.0198g of C 4 h 6 MnO 4 4H 2 O and the polyethylene glycol 20000 of 0.51g, standby. Accurately measure 2.75ml of acetylacetone in a beaker, then measure 2.75ml of tetra-n-butyl titanate dropwise into acetylacetone, stir on a magnetic stirrer for 6 hours to complete the chelation of titanium, defined as solution 1 . The weighed CH 3 COONa, Bi(NO 3 ) 3 ·5H 2 O, C 4 h 6 MnO 4 4H 2O was added into a beaker containing 10ml of ethylene glycol and heated and stirred at 50°C until it was completely dissolved, which was defined as solution 2. Add the weighed polyethylene glycol 20000 into a beaker containing 5ml of glacial acetic acid, heat and stir at 60°C until it is completely dissolved, which is defined as solution 3. After all the solutions were cooled, solutions 2 and 3 w...

Embodiment 3

[0040] (1) According to Na 0.5 Bi 0.5 Ti 0.99 mn 0.01 o 3-δ The stoichiometric ratio, accurately weigh 0.1690g of CH 3 COONa (2% in excess), 1.0290g of Bi(NO 3 ) 3 ·5H 2 O (5% excess), 0.0099g of C 4 h 6 MnO 4 4H 2 O and the polyethylene glycol 20000 of 0.25g, standby. Accurately measure 1.38ml of acetylacetone in a beaker, then measure 1.38ml of tetra-n-butyl titanate dropwise into acetylacetone, stir on a magnetic stirrer for 6 hours to complete the chelation of titanium, defined as solution 1 . The weighed CH 3 COONa, Bi(NO 3 ) 3 ·5H 2 O, C 4 h 6 MnO 4 4H 2 O was added into a beaker containing 10ml of ethylene glycol and heated and stirred at 60°C until it was completely dissolved, which was defined as solution 2. The weighed polyethylene glycol 20000 was added into a beaker filled with 5ml of glacial acetic acid, heated and stirred at 70°C until it was completely dissolved, which was defined as solution 3. After all the solutions were cooled, solution...

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Abstract

The invention belongs to the field of electronic functional materials, and concretely relates to a method for realizing coercive field reduction and pressure resistance improvement of a sodium bismuth titanate-based film. The general chemical formula of the film is Na0.5Bi0.5Ti1-xMnxO3-delta, wherein x is the mole content of manganese ions, x is greater than 0 and smaller than 0.05, and delta is the number of oxygen atoms which are lost to maintain the charge balance. An optimized chemical solution deposition preparation technology is adopted on the basis of the doping of the manganese ions to make the sodium bismuth titanate-based film with good ferroelectricity and dielectricity on an ITO / glass substrate. The sodium bismuth titanate-based film can be used to develop ferroelectric and dielectric functional materials and devices.

Description

technical field [0001] The invention belongs to the field of electronic functional materials and devices, and specifically relates to a method for reducing the coercive field of a bismuth sodium titanate-based thin film and improving its pressure resistance. Background technique [0002] Lead-free ferroelectric material sodium bismuth titanate (Na 0.5 Bi 0.5 TiO 3 ) due to its high Curie temperature (T c =320 °C), strong ferroelectricity (remnant polarization up to P r =38 μC / cm 2 ) has attracted much attention. For the thin film state, the volatilization of elements is inevitable in the process of high temperature crystallization (~700°C), and the resulting high leakage makes the remanent polarization of the film smaller; and the microstructure caused by the high temperature crystallization process is not uniform. Factors such as sex will lead to an increase in the coercive field. thus limiting the Na 0.5 Bi 0.5 TiO 3 Applications of thin films in electronic compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475C04B35/622
Inventor 杨长红冯超吴海涛韩亚洁钱进
Owner UNIV OF JINAN
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