Rare-earth doped spinel ferrite/aluminum-doped zinc oxide composite fiber and preparation method thereof

A technology of spinel ferrite and aluminum-doped zinc oxide, which is applied in the direction of inorganic raw material rayon, etc., can solve the problems such as no public report of rare earth-doped spinel ferrite/ZAO composite fiber, and achieve the process of Controllable parameters and microstructure, less pollution and high preparation purity

Inactive Publication Date: 2009-09-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, although there have been studies on the preparation of spinel ferrite fibers and microwave absorption characteristics, rare earth doped glass and laser protection properties, ZAO thin film preparation and infrared emission characteristics, there has been no rare earth doped spinel ferrite. Public reports on / ZAO composite fiber and its preparation

Method used

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  • Rare-earth doped spinel ferrite/aluminum-doped zinc oxide composite fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of the gel precursor: first dissolve basic nickel carbonate, cobalt nitrate, iron nitrate, samarium oxide, and citric acid in deionized water, Ni 2+ :Co 2+ :Fe 3+ :Sm: The molar ratio of organic acid is 0.6:0.4:1.9:0.1:8, stir evenly, stir at room temperature for 15-20 hours, and form a gel precursor after dehydration under reduced pressure;

[0027] (2) The organogel precursor is spun into gel cellulose filaments by spinning, spinning or spinning, and the cellulose filaments are kept in the temperature range of 700-800 °C, and then naturally cooled to room temperature after 5-6 hours of heat preservation. Rare earth doped spinel ferrite Ni 0.6 co 0.4 Fe 1.9 SM 0.1 o 4 The fiber is the core of the composite fiber;

[0028] (3) Put zinc acetate dihydrate and aluminum trichloride hexahydrate into the mixed solvent of ethanolamine and glycol methyl ether, wherein the molar ratio of Al:Zn:solvent is 1:0.1:12, and keep warm at 30°C for 2 After dissolv...

Embodiment 2

[0032] (1) Preparation of gel precursor: first, nickel acetate, cobalt acetate, iron nitrate, samarium oxide and lactic acid were dissolved in deionized water, and Ni 2+ :Co 2+ :Fe 3+ :Sm: The molar ratio of organic acid is 0.7:0.3:1.8:0.2:7, stir evenly, stir at room temperature for 12-15 hours, and form a gel precursor after dehydration under reduced pressure;

[0033] (2) The organogel precursor is spun into gel cellulose filaments by spinning, spinning or spinning. The cellulose filaments are kept in the temperature range of 600-700 ° C, and naturally cooled to room temperature after 7 hours of heat preservation to obtain rare earth Doped spinel ferrite Ni 0.7 co 0.3 Fe 1.8 SM 0.2 o 4 The fiber is the core of the composite fiber;

[0034] (3) Put zinc acetate dihydrate and aluminum trichloride hexahydrate into the mixed solvent of ethanolamine and glycol methyl ether, the molar ratio of Al:Zn:organic solvent is 1:0.2:13, and keep warm at 40°C for 2 hours After diss...

Embodiment 3

[0038] The rare earth element was replaced by Ce, and the others were the same as in Example 1. The obtained composite fiber had a core diameter of 8-12 μm, a length of 400 μm-1 m, and a coating thickness of 80-90 nm. The composite fiber has an attenuation of about 8dB in the 1-30GHz band, and a bending strength of 1300-1700kg / cm 2 .

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Abstract

The invention discloses a rare-earth doped spinel ferrite/aluminum-doped zinc oxide composite fiber and a preparation method thereof. The composite fiber is in a sandwich structure by coating an interlayer outside a core which is a rare-earth doped spinel ferrite fiber and has the diameter of 5 microns to 20 microns, and the interlayer is an aluminum-doped zinc oxide coating with the thickness of 50nm to 100nm. The method used for preparing target products has the advantages of high preparation purity, controllable process parameters and microstructures, simple technology, convenient operation, and the like and has important practical meanings on the premise that practical performance is not reduced, such as lower cost, little pollution, and the like. The composite fiber has favorable mechanical and optical performance, is a novel structure-function integrated material, is suitable for multiband absorption, function enhancement, and the like and satisfies the equipment requirements, such as thinness, lightness, width and strength.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a rare earth-doped spinel ferrite / aluminum-doped zinc oxide composite fiber and a preparation method thereof. Background technique [0002] The requirements of modern manufacturing technology for equipment are constantly increasing, and at the same time, functional materials are required to have the characteristics of "thin, light, wide, and strong". Composite fibers have good mechanical and optical properties, which is one of the future development directions of new functional materials. In-depth research Composite fiber materials are of great significance to improving my country's advanced manufacturing technology level and the international competitiveness of equipment. [0003] As a wave absorber and mechanical enhancer for structural materials, fibers can overcome the shortcomings of powder absorbers for coated materials, and while greatly reducing the density ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08
Inventor 朱永伟李军左敦稳林魁朱昌洪
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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