SrNdMnO wave-absorbing material and preparation method thereof

A wave absorbing material, metal nitrate technology, applied in chemical instruments and methods, other chemical processes, electrical components, etc., can solve problems such as adverse effects of electronic equipment, communication signal interference, failure to work properly, and reduce lattice distortion. , The effect of improving the absorbing performance and increasing the eddy current loss

Pending Publication Date: 2022-07-08
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, electromagnetic radiation can also have adverse effects on electronic equipment
High-frequency equipment, especially high-power high-frequency equipment, has a large output energy during operation, and the high-frequency radiation formed is very strong, which will cause serious interference to other electronic equipment, instruments, communication signals, etc. around it, and even make it unable to work normally, leading to serious consequences

Method used

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  • SrNdMnO wave-absorbing material and preparation method thereof
  • SrNdMnO wave-absorbing material and preparation method thereof
  • SrNdMnO wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] According to the molecular formula Sr 0.95 Nd 0.05 MnO 3Weigh 0.34 g of neodymium nitrate, 3.12 g of strontium nitrate and 5.55 g of manganese nitrate with a purity of ≥99.9%, and then weigh 9.78 g of citric acid according to the molar ratio of metal ions (strontium ion, manganese ion and neodymium ion) to citric acid 1:1.5 g, citric acid and distilled water are mixed to obtain a citric acid solution, then strontium nitrate, manganese nitrate and neodymium nitrate are added to the citric acid solution, the resulting solution is put into a water bath, and constant temperature magnetic stirring is continued at 80 ° C (stirring The speed is 280r / min), and the gelation reaction is carried out for 3h to obtain a gel. The gel is dried in a blast drying oven at 90°C, and the obtained dried product is pre-sintered at 1000°C for 2h. The obtained material was put into a muffle furnace and calcined at 1350 ° C for 2 h to obtain an oxide wave absorbing material, which was denoted...

Embodiment 2

[0037] According to the molecular formula Sr 0.9 Nd 0.1 MnO 3 Weigh 0.67 g of neodymium nitrate, 2.91 g of strontium nitrate and 5.47 g of manganese nitrate with a purity of ≥99.9%, and then weigh 9.64 g of citric acid according to the molar ratio of metal ions (strontium ion, manganese ion and neodymium ion) to citric acid 1:1.5 , citric acid and distilled water were mixed to obtain a citric acid solution, then strontium nitrate, manganese nitrate and neodymium nitrate were added to the citric acid solution, the resulting solution was put into a water bath, and the constant temperature magnetic stirring was continued at 80 ° C (stirring speed). 300 r / min), gelation reaction was carried out for 3 h to obtain a gel, the gel was dried in a blast drying oven at 100 °C, and the obtained dried product was pre-fired at 1000 °C for 2 h. The obtained material was put into a muffle furnace and calcined at 1350 °C for 2 hours to obtain an oxide wave absorbing material, which was denot...

Embodiment 3

[0039] According to the molecular formula Sr 0.85 Nd 0.15 MnO 3 Weigh 0.99g of neodymium nitrate, 2.71g of strontium nitrate and 5.39g of manganese nitrate with a purity of ≥99.9%, and then weigh citric acid according to the molar ratio of metal ions (strontium ion, manganese ion and neodymium ion) to citric acid 1:1.5 9.50g, citric acid and distilled water were mixed to obtain a citric acid solution, then strontium nitrate, manganese nitrate and neodymium nitrate were added to the citric acid solution, the resulting solution was put into a water bath, and the constant temperature magnetic stirring was continued at 80 ° C ( The stirring speed is 320r / min), and the gelation reaction is carried out for 3.5h to obtain a gel. The gel is dried in a blast drying oven at 110°C, and the obtained dried product is pre-fired at 1000°C. 2h, put the obtained material into a muffle furnace and calcined at 1350°C for 2h to obtain an oxide wave absorbing material, denoted as Sr 0.85 Nd 0....

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Abstract

The invention provides a SrNdMnO wave-absorbing material and a preparation method thereof, and relates to the technical field of microwave absorbing materials. The molecular formula of the SrNdMnO wave-absorbing material is Sr1-xNdxMnO3, x is more than 0 and less than or equal to 0.2, and the wave-absorbing material is obtained by adopting gelation reaction, pre-sintering and calcining. The invention overcomes the defects in the prior art, and the wave-absorbing material can absorb electromagnetic waves in the microwave band of 2-18GHz, and has the advantages of wide absorption frequency band, high absorption efficiency (greater than 90%), low absorption frequency, simple preparation process and suitability for large-scale production.

Description

technical field [0001] The invention relates to the technical field of microwave absorbing material processing, in particular to a SrNdMnO wave absorbing material and a preparation method thereof. Background technique [0002] With the development of modern science and technology, various electronic and electrical equipment have provided high efficiency for social production and brought great convenience to people's daily life. At the same time, the electromagnetic radiation and interference generated in the working process of electronic and electrical equipment will affect people's production and life, resulting in the deterioration of the electromagnetic environment in the human living space. In addition, the wide application of electromagnetic waves in science and technology has also brought new social problems, becoming a new source of pollution that is more harmful and difficult to protect after water, air and noise. It not only affects normal communication, but even di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/12C09K3/00H05K9/00
CPCC01G45/1264H05K9/0081C09K3/00C01P2006/42
Inventor 成丽春岳吉祥龙乾新向日姚青荣卢照邓健秋
Owner GUILIN UNIV OF ELECTRONIC TECH
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