公开(公告)号：US12222194B2

公开(公告)日：2025-02-11

申请号：US17559889

申请日：2021-12-22

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hun-Su Lee ,  Hyunsu Kim ,  Minkook Kim ,  Cheol-Min Yang ,  Dongsu Lee

IPC: F41H3/00 ,  B64C23/00 ,  H01Q17/00 ,  H05H1/24

Abstract: A radar-absorbing fiber-reinforced structure includes a fiber composite discharging part. The fiber composite discharging part includes a first electrode part and a second electrode part, which are spaced apart from each other by a dielectric layer and receive different voltages. The fiber composite discharging part is configured to discharge plasma in response to a voltage difference thereby changing a reflected wave or transmitted wave of a radar incident on the radar-absorbing fiber-reinforced structure to reduce reflectivity of the radar. At least one of the first electrode part and the second electrode part include a conductive fiber having a tensile strength equal to or more than 0.5 GPa.

公开(公告)号：US11186484B2

公开(公告)日：2021-11-30

申请号：US16844213

申请日：2020-04-09

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Seokhoon Ahn ,  Se Gyu Jang ,  Myung Jong Kim ,  Hun-Su Lee ,  Soul-Hee Lee ,  Min Sung Kang ,  Sangseok Lee ,  Yongho Joo

IPC: C01B21/064

Abstract: Disclosed is a method of purifying boron nitride nanotubes through a simplified process. Specifically, the method includes preparing a starting solution containing boron nitride nanotubes (BNNTs), a dispersant and a solvent, centrifuging the starting solution or allowing the starting solution to stand to collect a supernatant, adding an acid to the supernatant and filtering a resulting product.