Method for preparing manganese, nickel codoped bismuth ferrite film by sol-gel process

A technology of co-doping and bismuth ferrite, applied in chemical instruments and methods, iron compounds, inorganic chemistry, etc., can solve the problems of complicated steps, optical and magnetic properties, etc., and achieve simple steps, low equipment cost and excellent reaction process easy to control effects

Inactive Publication Date: 2013-06-12
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method prepares bismuth ferrite thin films with dielectric properties, the steps are complex and require special substrate processing methods, and this method does not pay attention to its optical and magnetic properties

Method used

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  • Method for preparing manganese, nickel codoped bismuth ferrite film by sol-gel process
  • Method for preparing manganese, nickel codoped bismuth ferrite film by sol-gel process
  • Method for preparing manganese, nickel codoped bismuth ferrite film by sol-gel process

Examples

Experimental program
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Effect test

Embodiment 1

[0020] a, the raw materials ferric nitrate, bismuth nitrate, manganese acetate and nickel acetate, according to formula BiFe 1-2x mn x Ni x o 3 , x=0.0125 for weighing. Add glacial acetic acid and stir at 80°C for 30 minutes, then add ethylene glycol methyl ether and stir at room temperature for 180 minutes to prepare a precursor solution with a concentration of 0.1mol / L;

[0021] b. Spread the precursor solution on the platinum substrate at a speed of 3000r / min for 20s to prepare a wet film;

[0022] c. Pre-anneal the wet film at 350°C for 5 minutes, then anneal at 550°C for 30 minutes;

[0023] d. Repeat step c 20 times to obtain the final sample.

Embodiment 2

[0025] a, the raw materials ferric nitrate, bismuth nitrate, manganese acetate and nickel acetate, according to formula BiFe 1-2x mn x Ni x o 3 , x=0.025 for weighing. Add glacial acetic acid and stir at 80°C for 30 minutes, then add ethylene glycol methyl ether and stir for 180 minutes at room temperature to prepare a precursor solution with a concentration of 0.2mol / L;

[0026] b. Spread the precursor solution on the indium tin oxide / glass substrate at a speed of 3000r / min for 20s to prepare a wet film;

[0027] c. Pre-anneal the wet film at 350°C for 5 minutes, then anneal at 550°C for 30 minutes;

[0028] d. Repeat step c 10 times to obtain the final sample.

Embodiment 3

[0030] a, the raw materials ferric nitrate, bismuth nitrate, manganese acetate and nickel acetate, according to formula BiFe 1-2x mn x Ni x o 3 , x=0.0375 for weighing. Add glacial acetic acid and stir at 80°C for 30 minutes, then add ethylene glycol methyl ether and stir for 180 minutes at room temperature to prepare a precursor solution with a concentration of 0.15mol / L;

[0031] b. Spread the precursor solution on the indium tin oxide / glass substrate at a speed of 3000r / min for 20s to prepare a wet film;

[0032] c. Pre-anneal the wet film at 350°C for 5 minutes, then anneal at 550°C for 30 minutes;

[0033] d. Step c was repeated 13 times to obtain the final sample.

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Abstract

The invention discloses a method for preparing manganese, nickel codoped bismuth ferrite film by a sol-gel process. The method comprises the steps of weighing material ferric nitrate, bismuth nitrate, manganese acetate and nickel acetate according to a general formula BiFe(1-2x)MnxNixO3 (x is smaller than or equal to 0.05 and greater than or equal to 0.0125); adding glacial acetic acid to agitate for 30 minutes at 80 DEG C; and adding ethylene glycol monomethyl ether to agitate for 180 minutes at room temperature to prepare into a liquid precursor of which the concentration is 0.1-0.2mol / L. The final sample is obtained by preparing a wet film on indium tin oxide / glass or a platinum substrate by a spin-coating method, pre-annealing, finally annealing the film, and repeating the pre-annealing and film annealing processes for 10-20 times. The method has the characteristics that the impurity phase in bismuth ferrite can be effectively restrained; the grain size and the root-mean-square roughness of the film surface are reduced; the insulating property, ferroelectric properties, the ferromagnetic property and the optical property of the sample are improved; and the method is simple in production technology, good in reproducibility, and low in cost.

Description

technical field [0001] The invention belongs to the technical field of multiferroic materials and their preparation, and in particular relates to a preparation method of manganese and nickel co-doped bismuth ferrite polycrystalline film. Background technique [0002] Multiferroic materials refer to the basic properties of materials containing two or more types of iron in the same phase. At present, ferroelectric materials with coexistence of ferroelectric order and magnetic order are more researched. In recent years, multiferroic materials have attracted extensive attention of scholars at home and abroad in terms of new magnetoelectric devices. Bismuth ferrite (BiFeO 3 , BFO) is a typical multiferroic material, and it is one of the few single-phase multiferroic materials with both ferroelectricity and antiferromagnetism at room temperature. This special property of bismuth ferrite makes it have important application prospects in magnetic and ferroelectric devices. In addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00C04B35/26C04B35/624
Inventor 李锦刘开通简基康闫灯周吴荣孙言飞
Owner XINJIANG UNIVERSITY
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