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nzfo-pzt type ferromagnetic electroceramic composite nanofiber microwave absorber, absorbing coating and preparation method

A technology of composite nanofibers and microwave absorbents, which is applied to coatings, inorganic raw material rayon and other directions, can solve the problems of difficult large-scale production, complex process, cumbersome operation, etc., and achieves short preparation cycle, simple process, Easy-to-use effects

Inactive Publication Date: 2016-09-21
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 ferromagnetic electroceramic composite nanofiber microwave absorber, absorbing coating and preparation method
  • nzfo-pzt type ferromagnetic electroceramic composite nanofiber microwave absorber, absorbing coating and preparation method
  • nzfo-pzt type ferromagnetic electroceramic composite nanofiber microwave absorber, absorbing coating and preparation method

Examples

Experimental program
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Embodiment 1

[0020] According to the ferromagnetic phase Ni 0.5 Zn 0.5 Fe 2 o 4 With the 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 join in the mixed solvent 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, 2.3879g iron nitrate, and then add 1.2000g PVP (average molecular weight approx. 1300000), continue magnetic stirring at room temperature for about 2 hours to form a homogeneous, transparent, stable spinning precursor solution, wherein the mass percentage of PVP is 8%, and the mass percentage of all metal salts is 27%. The prepared spinning solution is moved into the electrospinning device (Chinese patent 201110201848.7) composed of a DC high-voltage power supply, a liquid reservoir, a spinneret, a syringe ...

Embodiment 2

[0022] The basic preparation process is the same as in Example 1, except that the added tetrabutyl titanate, lead acetate, nickel acetate, zinc acetate, zirconium nitrate and iron nitrate are 0.0652g, 0.1514g, 0.4470g and 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 , with an average diameter of about 300nm, Ni 0.5 Zn 0.5 Fe 2 o 4 The average grain size of about 28nm, Pb (Zr 0.52 Ti 0.48 )O 3 The average grain size is about 23nm; when the absorber loading is 70% and the coating thickness is 5mm, the monolayer (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 silicone absorbing coating reaches –38dB at 6.96GHz.

Embodiment 3

[0024] The basic preparation process is the same as that in Example 1, except that the added tetrabutyl titanate, lead acetate, nickel acetate, zinc acetate, zirconium nitrate and iron nitrate are 0.3659g, 0.8497g, 0.2787g and 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 about 27nm, Pb (Zr 0.52 Ti 0.48 )O 3 The average grain size is about 22nm; when the absorber loading is 70% and the coating thickness is 4.5mm, the monolayer (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 silicone absorbing coating reaches –34dB at 6.16GHz.

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Abstract

The invention discloses a NZFO‑PZT ferromagnetic electroceramic composite nanofiber microwave absorber, a wave-absorbing coating and a preparation method, the chemical composition of which is ( n ) Ni x Zn 1‑x Fe 2 o 4 / (1- n )Pb(Zr 0.52 Ti 0.48 )O 3 , consisting of spinel-structured ferromagnetic Ni‑Zn ferrite and perovskite-structured ferroelectric Pb(Zr 0.52 Ti 0.48 )O 3 Composed of nanocrystals, Ni x Zn 1‑x Fe 2 o 4 The average grain size of Pb(Zr 0.52 Ti 0.48 )O 3 The average grain size of the fiber is 20-30nm, and the fiber diameter is about 150-300nm. The invention has the advantages of thin thickness, wide frequency band, strong absorption, low cost, wide-ranging regulation of electromagnetic parameters and absorption characteristics, etc., and has good application prospects in the fields of electromagnetic wave absorption and shielding, anti-electromagnetic interference and the like.

Description

technical field [0001] The invention belongs to the field of electromagnetic wave absorbing materials, in particular to a ferromagnetic / ferroelectric composite absorbing material with a one-dimensional nanostructure and a preparation method thereof, specifically Ni-Zn ferrite / Pb(Zr 0.52 Ti 0.48 )O 3 Composite nanofiber microwave absorber and its preparation technology. Background technique [0002] With the rapid development and wide application of electronic and communication equipment using GHz frequency electromagnetic waves, the resulting electromagnetic interference and electromagnetic radiation pollution are becoming more and more serious. At the same time, the demand for electromagnetic stealth in modern weapons and equipment is also increasing. In order to eliminate or reduce electromagnetic interference and electromagnetic pollution, and effectively reduce the radar signature of weapons and equipment to improve their survivability and defense capabilities and over...

Claims

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Application Information

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Patent Type & Authority Patents(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