Carbon composite cerium-doped manganese-zinc ferrite wave-absorbing material and preparation method thereof

Abstract

The invention discloses a preparation method of a carbon composite cerium-doped manganese-zinc ferrite wave-absorbing material. The preparation method comprises the following steps: 1) weighing a manganese salt, a zinc salt, a cerium salt and an iron salt, adding into deionized water to prepare a mixed solution, adding a NaOH aqueous solution into the mixed solution under a stirring condition, heating the mixed solution to react, and filtering, washing, drying and calcining the reaction product to obtain the cerium-doped manganese-zinc ferrite with the chemical formula of Mn0.5Zn0.5CexFe2-xO4;2) mixing the cerium-doped manganese-zinc ferrite with a carbon source, and calcining the mixture to obtain the carbon composite cerium-doped manganese-zinc ferrite wave-absorbing material. Accordingto the prepared carbon composite cerium-doped manganese-zinc ferrite wave-absorbing material, the dielectric loss performance of manganese-zinc ferrite is enhanced through reasonable element doping;meanwhile, the cerium-doped manganese-zinc ferrite is compounded with carbon, so that the electromagnetic impedance performance of the wave-absorbing material is greatly enhanced, and the wave-absorbing performance and effective bandwidth are greatly improved.

Description

technical field

[0001] The invention relates to the technical field of ferrite materials, in particular to a carbon-composite cerium-doped manganese-zinc ferrite wave-absorbing material and a preparation method thereof. Background technique

[0002] Ferrite has always been the mainstream absorbing material in the VLF-UHF frequency band, and is widely used in large-scale equipment, communication products, microwave anechoic chambers and other environments and devices for electromagnetic shielding and anti-electromagnetic interference in this frequency band. Nickel-zinc ferrite has always occupied a dominant position in the performance of ferrite absorbing materials, but it has become a bottleneck that is difficult to popularize due to its high raw material cost, and it is also difficult to cover the current wireless charging and Internet of Things due to its single loss mechanism. , intelligent products, etc. in the kHz-GHz frequency band application and expansion. Manganese...

Examples

Embodiment 1

[0018] A carbon-composite cerium-doped manganese-zinc ferrite wave-absorbing material, the preparation method of which comprises the following steps:

[0019] S1. Weigh 0.05mol MnSO 4 ·H 2 O, 0.05mol ZnSO 4 ·7H 2 O, 0.001mol Ce(NO 3 ) 3 ·6H 2 O, 0.099mol FeCl 3 , adding deionized water to prepare a mixed solution, adding 9mol / L NaOH aqueous solution to the mixed solution under the condition of vigorous stirring by an electromagnetic stirrer, adjusting the solution to pH=9, stirring and reacting at 85°C for 0.6h, and filtering, Wash with distilled water until neutral, dry, freeze-dry the filtrate, and calcinate at 1100°C for 2 hours to obtain the chemical formula Mn 0.5 Zn 0.5 Ce 0.02 Fe 1.98 o 4 Cerium doped manganese zinc ferrite;

[0020] S2. Mix the cerium-doped manganese-zinc ferrite obtained in step S1 with glucose, add it to a colloid mill and mill it for 4 hours. The amount of glucose added is 8% of the mass of the cerium-doped manganese-zinc ferrite, and ca...

Embodiment 2

[0022] A carbon-composite cerium-doped manganese-zinc ferrite wave-absorbing material, the preparation method of which comprises the following steps:

[0023] S1. Weigh 0.05mol MnSO 4 ·H 2 O, 0.05mol ZnSO 4 ·7H 2 O, 0.005mol Ce(NO 3 ) 3 ·6H 2 O, 0.095mol FeCl 3 , adding deionized water to prepare a mixed solution, adding 8 mol / L NaOH aqueous solution to the mixed solution under the condition of vigorous stirring by an electromagnetic stirrer, adjusting the solution to pH=8, stirring and reacting at 90°C for 0.5h, and filtering, Wash with distilled water until neutral, dry, freeze-dry the filtrate, and calcinate at 1200°C for 2 hours to obtain the chemical formula Mn 0.5 Zn 0.5 Ce 0.1 Fe 1.9 o 4 Cerium doped manganese zinc ferrite;

[0024] S2. Mix the cerium-doped manganese-zinc ferrite obtained in step S1 with sucrose, and add it to a colloid mill for ball milling for 2 hours. The amount of sucrose added is 10% of the mass of the cerium-doped manganese-zinc ferrit...

Embodiment 3

[0026] A carbon-composite cerium-doped manganese-zinc ferrite wave-absorbing material, the preparation method of which comprises the following steps:

[0027] S1. Weigh 0.05mol MnSO 4 ·H 2 O, 0.05mol ZnSO 4 ·7H 2 O, 0.003mol Ce(NO 3 ) 3 ·6H 2 O, 0.097mol FeCl 3 , add deionized water to prepare a mixed solution, add 10mol / L NaOH aqueous solution to the mixed solution under the condition of vigorous stirring of an electromagnetic stirrer, adjust the solution to pH=9, stir and react at 80°C for 1h, filter, distilled water Wash until neutral, dry, freeze-dry the filtrate, and calcinate at 1000°C for 3 hours to obtain the chemical formula Mn 0.5 Zn 0.5 Ce 0.06 Fe 1.94 o 4 Cerium doped manganese zinc ferrite;

[0028] S2. Mix the cerium-doped manganese-zinc ferrite obtained in step S1 with starch, add it to a colloid mill and mill it for 6 hours. The amount of starch added is 5% of the mass of the cerium-doped manganese-zinc ferrite, and calcined at 800° C. After 4 hour...

technical field

[0001] The invention relates to the technical field of ferrite materials, in particular to a carbon-composite cerium-doped manganese-zinc ferrite wave-absorbing material and a preparation method thereof. Background technique

[0002] Ferrite has always been the mainstream absorbing material in the VLF-UHF frequency band, and is widely used in large-scale equipment, communication products, microwave anechoic chambers and other environments and devices for electromagnetic shielding and anti-electromagnetic interference in this frequency band. Nickel-zinc ferrite has always occupied a dominant position in the performance of ferrite absorbing materials, but it has become a bottleneck that is difficult to popularize due to its high raw material cost, and it is also difficult to cover the current wireless charging and Internet of Things due to its single loss mechanism. , intelligent products, etc. in the kHz-GHz frequency band application and expansion. Manganese...

Examples

Embodiment 1

[0018] A carbon-composite cerium-doped manganese-zinc ferrite wave-absorbing material, the preparation method of which comprises the following steps:

[0019] S1. Weigh 0.05mol MnSO 4 ·H 2 O, 0.05mol ZnSO 4 ·7H 2 O, 0.001mol Ce(NO 3 ) 3 ·6H 2 O, 0.099mol FeCl 3 , adding deionized water to prepare a mixed solution, adding 9mol / L NaOH aqueous solution to the mixed solution under the condition of vigorous stirring by an electromagnetic stirrer, adjusting the solution to pH=9, stirring and reacting at 85°C for 0.6h, and filtering, Wash with distilled water until neutral, dry, freeze-dry the filtrate, and calcinate at 1100°C for 2 hours to obtain the chemical formula Mn 0.5 Zn 0.5 Ce 0.02 Fe 1.98 o 4 Cerium doped manganese zinc ferrite;

[0020] S2. Mix the cerium-doped manganese-zinc ferrite obtained in step S1 with glucose, add it to a colloid mill and mill it for 4 hours. The amount of glucose added is 8% of the mass of the cerium-doped manganese-zinc ferrite, and ca...

Embodiment 2

[0022] A carbon-composite cerium-doped manganese-zinc ferrite wave-absorbing material, the preparation method of which comprises the following steps:

[0023] S1. Weigh 0.05mol MnSO 4 ·H 2 O, 0.05mol ZnSO 4 ·7H 2 O, 0.005mol Ce(NO 3 ) 3 ·6H 2 O, 0.095mol FeCl 3 , adding deionized water to prepare a mixed solution, adding 8 mol / L NaOH aqueous solution to the mixed solution under the condition of vigorous stirring by an electromagnetic stirrer, adjusting the solution to pH=8, stirring and reacting at 90°C for 0.5h, and filtering, Wash with distilled water until neutral, dry, freeze-dry the filtrate, and calcinate at 1200°C for 2 hours to obtain the chemical formula Mn 0.5 Zn 0.5 Ce 0.1 Fe 1.9 o 4 Cerium doped manganese zinc ferrite;

[0024] S2. Mix the cerium-doped manganese-zinc ferrite obtained in step S1 with sucrose, and add it to a colloid mill for ball milling for 2 hours. The amount of sucrose added is 10% of the mass of the cerium-doped manganese-zinc ferrit...

Embodiment 3

[0026] A carbon-composite cerium-doped manganese-zinc ferrite wave-absorbing material, the preparation method of which comprises the following steps:

[0027] S1. Weigh 0.05mol MnSO 4 ·H 2 O, 0.05mol ZnSO 4 ·7H 2 O, 0.003mol Ce(NO 3 ) 3 ·6H 2 O, 0.097mol FeCl 3 , add deionized water to prepare a mixed solution, add 10mol / L NaOH aqueous solution to the mixed solution under the condition of vigorous stirring of an electromagnetic stirrer, adjust the solution to pH=9, stir and react at 80°C for 1h, filter, distilled water Wash until neutral, dry, freeze-dry the filtrate, and calcinate at 1000°C for 3 hours to obtain the chemical formula Mn 0.5 Zn 0.5 Ce 0.06 Fe 1.94 o 4 Cerium doped manganese zinc ferrite;

[0028] S2. Mix the cerium-doped manganese-zinc ferrite obtained in step S1 with starch, add it to a colloid mill and mill it for 6 hours. The amount of starch added is 5% of the mass of the cerium-doped manganese-zinc ferrite, and calcined at 800° C. After 4 hour...