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NZFO-PZT type iron magnet electric ceramic composite nanofiber microwave absorber, wave absorbing coating and preparation method

A technology of composite nanofibers and microwave absorbents, which is applied to coatings, inorganic raw material artificial filaments, etc., can solve the problems of difficulty in large-scale production, complex process, complicated operation, etc., and achieves short preparation cycle, simple process, Easy-to-use effects

Inactive Publication Date: 2014-11-26
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Purpose of the invention: for above-mentioned existing problems and deficiencies, a kind of chemical composition of the present invention is ( n ) Ni x Zn 1-x Fe 2 o 4 / (1- n )Pb(Zr 0.52 Ti 0.48 )O 3 (0≤ x ≤1, 0n < 100mol%), ferromagnetic / ferroelectric ceramic composite nanofiber microwave absorber with excellent microwave absorbing performance and preparation method thereof, solve the application blank of magnetoelectric ceramic composite nanofiber in the field of electromagnetic wave absorption, and the existing preparation technology Technical problems such as complex process, cumbersome operation, high cost, and difficulty in large-scale production

Method used

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  • NZFO-PZT type iron magnet electric ceramic composite nanofiber microwave absorber, wave absorbing coating and preparation method
  • NZFO-PZT type iron magnet electric ceramic composite nanofiber microwave absorber, wave absorbing coating and preparation method
  • NZFO-PZT type iron magnet electric ceramic composite nanofiber microwave absorber, wave absorbing coating and preparation method

Examples

Experimental program
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Embodiment 1

[0020] According to ferromagnetic phase Ni 0.5 Zn 0.5 Fe 2 O 4 With ferroelectric phase Pb(Zr 0.52 Ti 0.48 )O 3 The molar ratio is 7:3, first weigh 0.2069g tetrabutyl titanate and 0.4804 lead acetate and add them to a mixed solvent composed of 4.8750g DMF, 2.9250g acetic acid and 1.9500g deionized water (DMF, acetic acid and deionized water) The mass ratio is 5:3:2). After stirring and dissolving, add 0.3677 nickel acetate, 0.3243g zinc acetate, 0.2828g zirconium nitrate, and 2.3879g ferric nitrate. After further dissolution, add 1.2000g PVP (the average molecular weight is about It is 1.300000), and magnetic stirring is continued for about 2 hours at room temperature to form a homogeneous, transparent and stable spinning precursor solution, in which the mass percentage of PVP is 8%, and the mass percentage of all metal salts is 27%. Move the prepared spinning solution into an electrostatic spinning device (Chinese Patent 201110201848.7) composed of a DC high voltage power suppl...

Embodiment 2

[0022] The basic preparation process is the same as in Example 1, the difference is that the masses of the added tetrabutyl titanate, lead acetate, nickel acetate, zinc acetate, zirconium nitrate and ferric nitrate are 0.0652g, 0.1514g, 0.4470g, 0.3943g, respectively , 0.0891g and 2.9029g, the chemical composition of the synthesized magnetoelectric composite nanofibers is (90mol%) Ni 0.5 Zn 0.5 Fe 2 O 4 / (10mol%) Pb(Zr 0.52 Ti 0.48 )O 3 , Its average diameter is about 300nm, Ni 0.5 Zn 0.5 Fe 2 O 4 The average grain size is about 28nm, Pb(Zr 0.52 Ti 0.48 )O 3 The average grain size is about 23nm; when the absorbent filling is 70% and the coating thickness is 5mm, the single layer (90mol%) Ni 0.5 Zn 0.5 Fe 2 O 4 / (10mol%)Pb(Zr 0.52 Ti 0.48 )O 3 -The minimum reflectivity of the silica gel absorbing coating reaches -38dB at 6.96GHz.

Embodiment 3

[0024] The basic preparation process is the same as in Example 1, the difference is: the added mass of tetrabutyl titanate, lead acetate, nickel acetate, zinc acetate, zirconium nitrate and ferric nitrate are 0.3659g, 0.8497g, 0.2787g, 0.2458g, respectively , 0.5000g and 1.8098g, the chemical composition of the synthesized magnetoelectric composite nanofibers is (50mol%) Ni 0.5 Zn 0.5 Fe 2 O 4 / (50mol%) Pb(Zr 0.52 Ti 0.48 )O 3 The average diameter is about 200nm, Ni 0.5 Zn 0.5 Fe 2 O 4 The average grain size of Pb(Zr 0.52 Ti 0.48 )O 3 The average grain size is about 22nm; when the absorbent filling is 70% and the coating thickness is 4.5mm, the single layer (50mol%) Ni 0.5 Zn 0.5 Fe 2 O 4 / (50mol%)Pb(Zr 0.52 Ti 0.48 )O 3 -The minimum reflectivity of the silica gel absorbing coating reaches -34dB at 6.16GHz.

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Abstract

The invention discloses a NZFO-PZT type iron magnet electric ceramic composite nanofiber microwave absorber, a wave absorbing coating and a preparation method, the NZFO-PZT type iron magnet electric ceramic composite nanofiber microwave absorber has the following chemical composition of (n) NixZn1-xFe2O4 / (1-n) Pb (Zr0.52Ti0.48)O3, and comprises spinel structural ferromagnetic Ni-Zn ferrite and perovskite structural ferroelectric Pb (Zr0.52Ti0.48)O3 nanocrystal, the average crystal grain size of NixZn1-xFe2O4 is 20-40nm, the average crystal grain size of Pb (Zr0.52Ti0.48) O3 is 20-30nm, and the fiber diameter is about 150-300nm. The NZFO-PZT type iron magnet electric ceramic composite nanofiber microwave absorber has the advantages of thin thickness, wide frequency band, low cost, strong absorption, electromagnetic parameters and absorbing properties controllable in a wide range, and the like, and has good application prospects in electromagnetic wave absorption and shielding and anti electromagnetic interference and other fields.

Description

Technical field [0001] The invention belongs to the field of electromagnetic wave absorbing materials, and in particular relates to a ferromagnetic / ferroelectric composite wave absorbing material with one-dimensional nanostructures and a preparation method thereof, and specifically refers to Ni-Zn ferrite / Pb(Zr 0.52 Ti 0.48 )O 3 Composite nanofiber microwave absorbent and its preparation technology. Background technique [0002] With the rapid development and wide application of electronic and communication equipment using electromagnetic waves of G Hz frequency, the resulting electromagnetic interference and electromagnetic radiation pollution have become more and more serious. At the same time, the demand for electromagnetic stealth in modern weaponry is also increasing. In order to eliminate or reduce electromagnetic interference and electromagnetic pollution, and to effectively reduce the radar characteristic signals of weapons and equipment to improve their survival and defen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08C09D7/12
Inventor 向军叶芹李佳乐刘敏徐加焕
Owner JIANGSU UNIV OF SCI & TECH