Lanthanum doped nano barium ferrite film and method of manufacturing the same

A barium ferrite and lanthanum doping technology is applied in the field of preparing precursors of lanthanum-doped nano-barium ferrite, and achieves the effects of easy quantitative doping, control of film composition and microstructure, and simple process flow

Inactive Publication Date: 2009-02-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Lanthanum doped nano barium ferrite film and method of manufacturing the same
  • Lanthanum doped nano barium ferrite film and method of manufacturing the same
  • Lanthanum doped nano barium ferrite film and method of manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This experiment is to prepare a rare earth lanthanum-doped nano-barium ferrite film with a ratio of La / Ba=0.2. The specific steps are as follows:

[0027] 1. Put barium nitrate (0.5g) and lanthanum nitrate (0.1243g) into beaker A, add 200ml of distilled water to make the solution viscosity 2-4mPa·s, stir until completely dissolved;

[0028] 2. Put the main salt ferric nitrate (6.956g) into the B beaker, add 200ml of distilled water to make the solution viscosity 2-4mPa·s, stir until completely dissolved;

[0029] 3. Add citric acid (10.252g) into the B beaker and stir until completely dissolved;

[0030] 4. Put the beaker A into the beaker B, and stir for 5 minutes; slowly add ethylene glycol (5.44ml), continue to stir and control the temperature between 70°C, and slowly evaporate to obtain the sol;

[0031] 5. Soak the silica substrate in the sol, and use the dipping-pulling method to coat the film; pull it out of the liquid surface vertically at a rate of 2mm / s to fo...

Embodiment 2

[0036] This experiment is to prepare a rare earth lanthanum-doped nano-barium ferrite film with a ratio of La / Ba=0.4. The specific steps are as follows:

[0037] 1. Put barium nitrate (0.5g) and lanthanum nitrate (0.2486g) into beaker A, add 200ml of distilled water to make the solution viscosity 2-4mPas, stir until completely dissolved;

[0038] 2. Put the main salt ferric nitrate (6.956g) into the B beaker, add 200ml of distilled water to make the solution viscosity 2-4mPa·s, stir until completely dissolved;

[0039] 3. Add citric acid (10.453g) into beaker B and stir until completely dissolved;

[0040] 4. Put the beaker A into the beaker B and stir for 5 minutes; slowly add ethylene glycol (5.55ml), continue to stir and keep the temperature between 80°C and evaporate slowly to obtain a sol with a suitable viscosity;

[0041] 5. Soak the silica substrate in the sol, and use the dipping-pulling method to coat the film; pull it up and out of the liquid surface at a rate of 2...

Embodiment 3

[0046] This embodiment is to prepare a rare earth lanthanum-doped nano-barium ferrite film with a ratio of La / Ba=0.6, and the specific steps are as follows:

[0047] 1. Put barium nitrate (0.5g) and lanthanum nitrate (0.3729g) into beaker A, add 200ml of distilled water to make the solution viscosity 2-4mPa·s, stir until completely dissolved;

[0048] 2. Put the main salt ferric nitrate (6.956g) into the B beaker, add 200ml of distilled water to make the solution viscosity 2-4mPa·s, stir until completely dissolved;

[0049] 3. Add citric acid (10.654g) into the B beaker and stir until completely dissolved;

[0050] 4. Put the beaker A into the beaker B, stir for 5 minutes; slowly add ethylene glycol (5.65ml), continue to stir and keep the temperature between 75°C, evaporate slowly to obtain a sol with a suitable viscosity;

[0051] 5. Soak the silica substrate in the sol, and use the dipping-pulling method to coat the film; pull it out of the liquid surface vertically at a ra...

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Abstract

The invention relates to a lanthanum doping nanometer barium ferrite thin film and a preparation method thereof, which is technically characterized in that the prescription is as follows: 1.48 g/100 ml to 1.60 g/100 ml of glycol, 2.51 g/100 ml to 2.71 g/100 ml of citric acid, 1.74 g/100 ml of iron nitrate, 0.125 g/100 ml of barium nitrate and 0.03 g/100 ml to 0.125 g/100 ml lanthanum nitrate. The preparation method is that the iron nitrate, the barium nitrate, the lanthanum nitrate, and the like, serve as raw materials to prepare a forerunner body the forerunner body of the lanthanum doping nanometer barium ferrite in a sol-gel method; sol-gel method; clean silicon dioxide serves as a support base, the iron nitrate, the barium nitrate and the lanthanum nitrate serve as main salt, the citric acid serves as complexing agent, the glycol serves as complexing agent assist, and the soakage-drawing method is adopted to make the film. The method has the advantages of simple process flow and low cost; the method is convenient for preparing the thin film on bases with different shapes, the lanthanum doping nanometer barium ferrite thin film with high purity is obtained, and the thin film can be used for preparing magnetic recording materials and absorbing materials.

Description

technical field [0001] The invention relates to a lanthanum-doped nano-barium ferrite thin film and a preparation method thereof, mainly using ferric nitrate, barium nitrate, lanthanum nitrate, etc. as raw materials to prepare a precursor of lanthanum-doped nano-barium ferrite by using a sol-gel method body; with clean silicon dioxide as the substrate, ferric nitrate, barium nitrate, and lanthanum nitrate as the main salt, citric acid as the complexing agent, and ethylene glycol as the auxiliary complexing agent, the film is formed by dipping-pulling method. Background technique [0002] The current research on the nano-barium ferrite material shows that the material has unsatisfactory absorbing properties and the absorbing frequency band needs to be further broadened. Rare earth elements are rich in f-layer electrons, and their compounds themselves are absorbing materials with excellent magnetic properties. Therefore, the doping of rare earth elements will inevitably play a...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/624
Inventor 黄英杨永峰齐暑华李玉青黄飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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