Chung-shan Institute of Science and Technology, Armaments, Bureau, Ministry of National Defense

Yen-Chung Chen

Hsiou-Jeng Shy

Shang-Wanq Yeh

Ming-Der Ger

Ching-Yu Tso

Hung-Fang Huang

Chien-Chih Kung

Ker-Jer Huang

Chih-kai Chang

Jen-Bin Won

In a method for making a wave-absorbing sheet, first emulsified mixture is provided by mixing wave-absorbing particles with graphene solution so that the graphene solution absorbs the wave-absorbing particles. Secondly, second emulsified mixture is provided by adding and blending resin solution in the first emulsified mixture. Thirdly, third emulsified mixture is provided by adding and blending interface modifier in the second emulsified mixture. Then, two conductive substrates are submerged in the third emulsified mixture, and voltage is provided to the third emulsified mixture so that the wave-absorbing particles, the resin solution and the graphene solution are evenly coated on the conductive substrates. Then, a wave-absorbing sheet is provided by eroding and removing the conductive substrates. Finally, the wave-absorbing sheet is washed and dried. The wave-absorbing sheet is thin, light and flexible, and exhibits a wide absorption frequency band and a high absorption rate.

Method for making a wave-absorbing sheet

Disclosed is a method for making absorbent for metal. In the method, at first, solution of first monomer and solution of second monomer are provided. Then, the solution of the second monomer is introduced into the solution of the first monomer. Finally, a microwave reaction is executed to provide micro-alls of absorbent for metal.

Method for making absorbent for metal

A preparing method for coating polymethylmethacrylate (PMMA) particles with silicon dioxide is disclosed and includes the following steps of: preparing a silicon dioxide solution by mixing a silicon dioxide powder and a solvent; adding a dispersant-and-interface-modifier agent into the silicon dioxide solution; performing a wet grinding to the silicon dioxide solution with the dispersant-and-interface-modifier agent so as to obtain a plurality of nano-sized silicon dioxide particles with negative charge; performing an interface modification to a plurality of PMMA particles to be charged with positive charge; adding the PMMA particles into the silicon dioxide solution; making the PMMA particles adsorb the nano-sized silicon dioxide particles; and performing a solid-liquid separation process to the silicon dioxide solution so as to obtain the chemical composite particles.

Preparing method for coating PMMA particles with silicon dioxide

Growing community of inventors

Taoyuan County, Taiwan

Yen-Chung Chen