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Preparation method of BaFe12O19-Ni0.8Zn0.2Fe2O4/barium titanate wave-absorbing coating agent

A technology of bafe12o19-ni0.8zn0.2fe2o4 and wave-absorbing coating, which is applied in the direction of titanate, alkaline earth metal titanate, chemical instruments and methods, and can solve the problems of low absorption strength, high density, and high processing cost

Pending Publication Date: 2021-10-22
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the above materials, although magnetic materials have the advantages of low cost, high thermal stability and good mechanical properties, they have disadvantages such as high density, high processing cost, and easy corrosion; single conductive polymers and carbon materials It has the advantages of wide absorption band and low production cost, but has the disadvantages of poor stability, narrow absorption frequency band, and low absorption intensity; ceramic materials have good mechanical properties and thermophysical properties, low density, good wave absorption performance, and can effectively absorb radar. Therefore, it is difficult for a single absorbing material to meet the requirements of new absorbing materials. Combining different types of materials is the development direction of microwave absorbing materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 0.5g Ba(NO 3 ) 2 , 10.3g Fe(NO 3 ) 3 9H 2 O, 0.39g Ni(NO 3 ) 2 ·6H 2 O and 0.1gZn(NO 3 ) 2 ·6H 2 O was put into 15.333g of citric acid aqueous solution, stirred at 75°C to form a transparent solution, then added 8.14mL of ethylene glycol, stirred and then added ammonia water, adjusted the pH value to 6-7, and stirred at 75°C to a certain Viscosity of the gel, dried at 120 ° C into a dry gel. Finally, the dried gel was pre-sintered in a programmable furnace at 400°C for 3 hours, baked at 1100°C for 2 hours, cooled naturally and ground to obtain a black powder, which is BaFe 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 ferrite.

[0032] Weigh 31.3g of tetrabutyl titanate liquid and 23.475g of barium acetate. Dissolve the weighed tetrabutyl titanate in 30mL of ethanol, stir it with a strong magnetic stirrer to make it fully mixed, then add 30mL of 1moL / L hydrochloric acid drop by drop, and continue stirring to obtain liquid A; Dissolve barium acetate in 70mL of deioni...

Embodiment 2

[0035] 0.5g Ba(NO 3 ) 2 , 10.4g Fe(NO 3 ) 3 9H 2 O, 0.4g Ni(NO 3 ) 2 ·6H 2 O and 0.1gZn(NO 3 ) 2 ·6H 2 O was put into 15.333g of citric acid aqueous solution, stirred at 75°C to form a transparent solution, then added 8.14mL of ethylene glycol, stirred and then added ammonia water, adjusted the pH value to 6-7, and stirred at 75°C to a certain Viscosity of the gel, dried at 120 ° C into a dry gel. Finally, the dried gel was pre-sintered in a programmable furnace at 400°C for 3 hours, baked at 1100°C for 2 hours, cooled naturally and ground to obtain a black powder, which is BaFe 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 ferrite.

[0036] Weigh 31.3g of tetrabutyl titanate liquid and 23.788g of barium acetate. Dissolve the weighed tetrabutyl titanate in 30mL of ethanol, stir it with a strong magnetic stirrer to make it fully mixed, then add 30mL of 1moL / L hydrochloric acid drop by drop, and continue stirring to obtain liquid A; Dissolve barium acetate in 70mL of deioniz...

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PUM

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Abstract

The invention relates to the field of new materials, in particular to a preparation method of a BaFe12O19-Ni0.8Zn0.2Fe2O4 / barium titanate wave-absorbing coating agent. BaFe12O19 is used as a hard magnet, Ni0.8Zn0.2Fe2O4 is used as a soft magnet, BaFe12O19-Ni0.8Zn0.2Fe2O4 nanocrystal composite powder and barium titanate powder are prepared by adopting a sol-gel method, and then the BaFe12O19-Ni0.8Zn0.2Fe2O4 nanocrystal composite powder and the barium titanate powder are separately calcined in a muffle furnace to obtain the BaFe12O19-Ni0.8Zn0.2Fe2O4 and the barium titanate wave-absorbing material. And finally, BaFe12O19-Ni0.8Zn0.2Fe2O4 ferrite, barium titanate, carbon black, an adhesive, water and other materials are prepared into a viscous novel wave-absorbing coating finishing agent, and coating finishing is conducted on a pure cotton fabric.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a BaFe 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 / preparation method of barium titanate wave-absorbing coating agent. Background technique [0002] At present, the relatively mature absorbing materials include magnetic materials, carbon materials, conductive polymers and ceramic materials. Among the above materials, although magnetic materials have the advantages of low cost, high thermal stability and good mechanical properties, they have disadvantages such as high density, high processing cost, and easy corrosion; single conductive polymers and carbon materials It has the advantages of wide absorption band and low production cost, but has the disadvantages of poor stability, narrow absorption frequency band, and low absorption intensity; ceramic materials have good mechanical properties and thermophysical properties, low density, good wave absorption performance, and can effectively a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/49D06M11/46D06M11/74C01G53/00C01G49/00C01G23/00
CPCD06M11/49D06M11/46D06M11/74C01G53/006C01G49/00C01G23/006C01P2004/82C01P2006/42
Inventor 丁娟程立刚胡斌庄昕
Owner ZHONGYUAN ENGINEERING COLLEGE