Unlock instant, AI-driven research and patent intelligence for your innovation.

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, applied in the direction of inorganic raw material artificial filaments, etc., can solve the problems that have not yet been reported publicly on rare earth-doped spinel ferrite/ZAO composite fiber, and achieve the process The effects of controllable parameters and microstructure, convenient operation, and good mechanical and optical properties

Inactive Publication Date: 2010-12-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rare-earth doped spinel ferrite/aluminum-doped zinc oxide composite fiber and preparation method thereof
  • 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 gel precursor: firstly dissolve basic nickel carbonate, cobalt nitrate, ferric nitrate, samarium oxide, and citric acid in deionized water, and Ni 2+ : Co 2+ : Fe 3+ The molar ratio of :Sm: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 picking or spinning or spinning. The cellulose filaments are in the temperature range of 700 to 800 ℃, and after holding for 5 to 6 hours, they are naturally cooled to room temperature. Obtain rare earth doped spinel ferrite Ni 0.6 Co 0.4 Fe 1.9 Sm 0.1 O 4 Fiber, which is the core of composite fiber;

[0028] (3) Put zinc acetate dihydrate and aluminum trichloride hexahydrate into a mixed solvent of ethanolamine and glycol methyl ether, where the molar ratio of Al:Zn:solvent is 1:0.1:12, and the temperature is kept at 30°C 2 Dissolve and rea...

Embodiment 2

[0032] (1) Preparation of gel precursor: first dissolve nickel acetate, cobalt acetate, ferric nitrate, samarium oxide and lactic acid in deionized water, and Ni 2+ : Co 2+ : Fe 3+ The molar ratio of :Sm:organic acid is 0.7:0.3:1.8:0.2:7, stir evenly, and 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 picking or spinning or spinning. The cellulose filaments are in the temperature range of 600-700°C, and after holding for 7 hours, they are naturally cooled to room temperature to obtain rare earths. Doped spinel ferrite Ni 0.7 Co 0.3 Fe 1.8 Sm 0.2 O 4 Fiber, which is the core of 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 the temperature is kept at 40℃ for 2 hours Dissolve and r...

Embodiment 3

[0038] The rare earth element is replaced with Ce, and the others are the same as in Example 1. The obtained composite fiber has a core diameter of 8-12 μm, a length of 400 μm-1m, 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 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

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 of50nm 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 specifically 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. This is one of the future development directions of new functional materials. In-depth research Composite fiber materials are of great significance to improving the level of my country's advanced manufacturing technology and the international competitiveness of equipment. [0003] Fiber, as a wave absorber and mechanical enhancer for structural materials, can overcome the shortcomings of powder wave absorbers for coated materials, and while greatly reducing the densi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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