A kind of dielectric material and its manufacturing method

Abstract

The invention provides a dielectric material and a manufacturing method thereof. The dielectric material includes: the foamed sphere obtained by one foaming at the second temperature T m Below 20°C to T m Below 5°C, filled with CO with a second pressure of 15-20MPa 2 Carry out foaming 30-3600min again in the mold cavity of the mold cavity, obtain dielectric material; Wherein, the specific step of described primary foaming comprises: the foaming material sphere that diameter is 20-800mm is at the first temperature T m below 80°C to T m Below 20°C, filled with CO with a first pressure of 15-20MPa 2 Foaming is carried out in the mold cavity to obtain foamed spheres. The present invention also provides the dielectric material produced by the above-mentioned production method. The manufacturing method can manufacture dielectric materials that are integrally formed and whose dielectric constant changes gradually.

Description

A kind of dielectric material and its manufacturing method technical field [0001] The present invention relates to the technical field of dielectric materials, particularly a dielectric material and a manufacturing method thereof. Background technique In 1944, the American mathematician Rudolf Karl Lüneburg proposed the model of Lunberg lens Lunberg lens, the An important basis of the model is that the dielectric constant of the sphere changes gradually from the inside to the outside according to a specific law. due to making The high-tech industrialization technology is immature, and the Lunberg lens antenna has not yet been widely used. Application number is CN 201911238076.7, title is " can not use the Lunberg lens production method of adhesive " Chinese patent, the application number is CN 201910225149.2, the Chinese patent titled "Production Method of Longbo Lens", application No. CN 201811615162.0, titled "All-media multi-beam scanning Lunberg lens structure...

AI Technical Summary

Problems solved by technology

Due to the high production cost and immature industrialization technology, Lunbo lens antenna has not been widely used yet

[0003] The application number is CN 201911238076.7, the Chinese patent titled "Longbo Lens Production Method Without Using Adhesive", the application number is CN 201910225149.2, the Chinese patent titled "Longbo Lens Production Method", the application number is CN 201811615162.0 , a Chinese patent titled "All-Medium Multi-beam Scanning Luneburg Lens Structure and Printing Method Suitable for 3D Printing", application number CN 201910686927.8, a Chinese patent titled "A Production Method of Lunebo Lens", application number A Chinese patent with CN 201910683233.9 titled "A Production Method for a Stacked Luneburg Lens", and a Chinese patent with application number CN 202010327192.2 titled "A Spherical Dielectric Material and Its Production Method and Luneburg Lens" The patent discloses a variety of Lumber lens manufacturing methods, including: (1) one-time foaming after multi-layer wrapping, so that the dielectric constant gradient changes. The disadvantage is that the number of wrapping layers is small, and the dielectric constant does not gradually change. Obviously, can not meet the requirements

(2) Use 3D printing to splicing two hemispherical lenses, but the cost of 3D printing is too high, the industrialization ability is weak, and the preparation time is too long

(3) Adhesives are used to bond multi-layer granular materials into spherical Luneberg lenses. This method requires the use of a large amount of adhesives, pollutes the environment, and cannot ensure consistent bonding thickness, which has a great impact on performance and is cumbersome to operate.

(4) The granular material is made into a multi-layer hemisphere, and then spliced ​​into a sphere. Although no adhesive is used, this technology cannot guarantee the stability of splicing, and the distribution of particles at the merged place is relatively uneven, which affects performance.

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