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Manganese cerium doped nickel zinc ferrite nano wave absorbing powder and preparation method thereof

A nickel-zinc ferrite and nanotechnology, which is applied in the fields of radar wave absorption and functional materials, can solve the problems such as nano-absorbing powders that have not yet been seen, and achieve the effects of stable process, obvious absorption effect and good repeatability.

Inactive Publication Date: 2015-04-22
PLA SECOND ARTILLERY ENGINEERING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are still some related technologies and literature reports, but there are no related reports on the preparation of manganese-cerium-doped nickel-zinc ferrite nano wave-absorbing powder

Method used

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  • Manganese cerium doped nickel zinc ferrite nano wave absorbing powder and preparation method thereof
  • Manganese cerium doped nickel zinc ferrite nano wave absorbing powder and preparation method thereof
  • Manganese cerium doped nickel zinc ferrite nano wave absorbing powder and preparation method thereof

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Effect test

Embodiment 1

[0020] Step 1: Accurately weigh 72.7g of nickel nitrate, 25g of manganese nitrate, 44.6g of zinc nitrate, 399.95g of iron nitrate, and 4.34g of cerium nitrate, and dissolve them in deionized water to form a mixed solution. Accurately weigh 384.3 g of citric acid and dissolve in the above solution, and stir fully to form a uniform and stable solution.

[0021] Step 2: Add 25% by mass concentrated ammonia water under continuous stirring to adjust the pH value of the solution to 7. Place the beaker containing the solution in an 80°C water bath environment, stir and heat continuously until a viscous wet gel is formed, then place it in a constant temperature drying oven at 120°C to dry until a xerogel is formed, and ignite it in the air to dry Glue to obtain the ferrite precursor;

[0022] Step 3: Calcining the precursor powder in a high-temperature sintering furnace at 1200°C for 3 hours, then cooling to room temperature with the furnace, and the product is manganese-cerium-doped...

Embodiment 2

[0024] Step 1: Accurately weigh 36.4g of nickel nitrate, 87.5g of manganese nitrate, 7.45g of zinc nitrate, 383.8g of iron nitrate, and 21.7g of cerium nitrate, and dissolve them in deionized water to form a mixed solution. Accurately weigh 384.3 g of citric acid and dissolve in the above solution, and stir fully to form a uniform and stable solution.

[0025] Step 2: Add concentrated ammonia water (25% by mass) under continuous stirring to adjust the pH value of the solution to 7. Place the beaker containing the solution in an 80°C water bath environment, stir and heat continuously until a viscous wet gel is formed, then place it in a constant temperature drying oven at 120°C to dry until a xerogel is formed, and ignite it in the air to dry Glue to obtain ferrite precursor.

[0026] Step 3: Calcining the precursor powder in a high-temperature sintering furnace at 1200°C for 3 hours, then cooling to room temperature with the furnace, and the product is manganese-cerium-doped ...

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Abstract

The invention relates to manganese cerium doped nickel zinc ferrite nano wave absorbing powder and a preparation method of the manganese cerium doped nickel zinc ferrite nano wave absorbing powder. According to the manganese cerium doped nickel zinc ferrite nano wave absorbing powder, a proper amount of manganese and cerium are added into nickel zinc ferrite to prepare nano nickel-based ferrite, the widening and matching thickness of a wave absorbing frequency band is reduced, and the wave absorbing powder meets the requirements for high absorption and the wide frequency band. According to the chemometry general formula Mn0.2+2yNi0.5-yZn0.3-yCexFe2-xO4 of the wave absorbing powder, a sol-gel method is adopted, nickel zinc ferrite precursors with different manganese cerium doping amounts are obtained, and the manganese cerium doped nickel zinc ferrite nano wave absorbing powder is obtained after high-temperature calcination. The process is simple, energy consumption is reduced, the wave absorbing powder is good in electromagnetic performance, and broadband absorption on radar waves can be achieved within the frequency band of 2 GHz to 18 GHz.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and relates to a manganese-cerium-doped nickel-zinc ferrite nano wave-absorbing powder and a preparation method thereof, which are mainly used in the technical field of radar wave absorption. Background technique [0002] Spinel-type nickel ferrite (NiFe 2 o 4 ) as a typical soft magnetic material is widely used in the field of radar absorbing materials because of its good ferromagnetic and electrochemical stability, low electrical conductivity and huge reserves in nature. However, pure NiFe 2 o 4 The absorbing frequency band is narrow, and the matching thickness is usually about 6mm, and the absorbing performance needs to be improved. In recent years, researchers have mainly prepared multi-component composite nickel-based ferrite to further improve the NiFe 2 o 4 The purpose of absorbing performance. NiFe 2 o 4 as the matrix, through the Zn 2+ , Mg 2+ Doping with differen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/40C04B35/624
Inventor 刘祥萱刘渊王煊军
Owner PLA SECOND ARTILLERY ENGINEERING UNIVERSITY
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