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Lanthanum doped stannic oxide hollow porous micro-nano sphere, and preparation method and applications thereof

A tin dioxide, hollow and porous technology, applied in tin oxide, nanotechnology, nanotechnology, etc., can solve the problems of large matching thickness, high density, narrow frequency band, etc., and achieve the effect of small matching thickness, wide frequency bandwidth and low density

Active Publication Date: 2019-01-11
ARMY ENG UNIV OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the technical problems such as narrow frequency band, high density, and large matching thickness of existing low-frequency absorbing materials, the present invention provides a hollow porous micro-nanosphere doped with lanthanum

Method used

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  • Lanthanum doped stannic oxide hollow porous micro-nano sphere, and preparation method and applications thereof
  • Lanthanum doped stannic oxide hollow porous micro-nano sphere, and preparation method and applications thereof
  • Lanthanum doped stannic oxide hollow porous micro-nano sphere, and preparation method and applications thereof

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Embodiment 1

[0031] This embodiment provides a method for preparing lanthanum-doped tin dioxide hollow porous micro-nanospheres, which specifically includes the following steps:

[0032] Step a, weigh 29.91mmol (6.7492g) SnCl 2 2H 2 O and 0.09mmol (0.0390g) La(NO 3 ) 3 ·6H 2 O mixed, after mixing, dissolved in a mixed solvent composed of 30g N,N-dimethylformamide (DMF) and 30g ethanol, and fully stirred until completely dissolved. Then, 20 g of polyvinylpyrrolidone (PVP) was added into the above mixed solution, and magnetically stirred for 1 hour to prepare the electrospray precursor solution.

[0033] Step b, move the electrospray precursor solution into the syringe, then install it on the micro-injection pump, carry out electrospray, and prepare La 3+ doped SnCl 2 / PVP micro-nano composite ball precursor. The parameters of the EFI process were adjusted as follows: at room temperature, the voltage was 20kV, the needle was a 19G stainless steel needle, the distance between the needl...

Embodiment 2

[0036] This embodiment provides a method for preparing lanthanum-doped tin dioxide hollow porous micro-nanospheres, which specifically includes the following steps:

[0037] Step a, weigh 29.82mmol (6.7289g) SnCl 2 2H 2 O and 0.18mmol (0.0779g) La(NO 3 ) 3 ·6H 2 O mixed, after mixing, dissolved in a mixed solvent composed of 30g N,N-dimethylformamide (DMF) and 30g ethanol, and fully stirred until completely dissolved. Then, 20 g of polyvinylpyrrolidone (PVP) was added into the above mixed solution, and magnetically stirred for 1 hour to prepare the electrospray precursor solution.

[0038] Step b, move the electrospray precursor solution into the syringe, then install it on the micro-injection pump, carry out electrospray, and prepare La 3+ doped SnCl 2 / PVP micro-nano composite ball precursor. The parameters of the EFI process were adjusted as follows: at room temperature, the voltage was 20kV, the needle was a 19G stainless steel needle, the distance between the needle...

Embodiment 3

[0041] This embodiment provides a method for preparing lanthanum-doped tin dioxide hollow porous micro-nanospheres, which specifically includes the following steps:

[0042] Step a, weigh 29.82mmol (6.7289g) SnCl 2 2H 2 O and 0.18mmol (0.0779g) La(NO 3 ) 3 ·6H 2 O mixed, after mixing, dissolved in a mixed solvent composed of 30g N,N-dimethylformamide (DMF) and 30g ethanol, and fully stirred until completely dissolved. Then, 20 g of polyvinylpyrrolidone (PVP) was added into the above mixed solution, and magnetically stirred for 1 hour to prepare the electrospray precursor solution.

[0043] Step b, move the electrospray precursor liquid into the syringe, then install it on the micro injection pump, and carry out electrospray to prepare La 3+ doped SnCl 2 / PVP micro-nano composite ball precursor. The parameters of the EFI process were adjusted as follows: at room temperature, the voltage was 18kV, the needle was a 19G stainless steel needle, the distance between the needl...

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Abstract

The invention belongs to the technical field of low frequency wave absorbing material, and especially relates to a lanthanum doped stannic oxide hollow porous micro-nano sphere, and a preparation method and applications thereof. The lanthanum doped stannic oxide hollow porous micro-nano sphere is prepared from stannous chloride and lanthanum nitrate through electronic injection method and thermaltreatment. The preparation method comprises following steps: an electronic injection precursor solution is prepared from tannous chloride, lanthanum nitrate, N, N-dimethyl formamide, absolute ethyl alcohol, and polyvinylpyrrolidone, electronic injection is adopted to prepare precursor micro-nano composite spheres, and thermal treatment is adopted so as to obtain the lanthanum doped stannic oxide hollow porous micro-nano spheres. The lanthanum doped stannic oxide hollow porous micro-nano spheres are excellent in low frequency (lower than 8GHz) wave absorbing performance.

Description

technical field [0001] The invention relates to the technical field of preparation of low-frequency wave-absorbing materials, in particular to a lanthanum-doped tin dioxide hollow porous micro-nanosphere and a preparation method and application thereof. Background technique [0002] With the development of science and technology, electromagnetic wave radiation pollution is becoming more and more serious. The electromagnetic interference it causes not only affects the normal operation of electronic instruments and equipment, but also has great harm to human health, which promotes the wide application of wave-absorbing materials. . In the military, due to the rapid development of radar testing technology and precision-guided weapons, in order to improve the survivability of military targets and the penetration capability of weapon systems, the research and development of wave-absorbing materials has also become one of the hot spots for military powers to compete for military h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G19/02C01P2004/34
Inventor 赵芳王建江唐香珺张飒李青孟祥宁刘冬芳曹洪娜程兆刚张翼飞付佳赵冉
Owner ARMY ENG UNIV OF PLA