High temperature microwave absorbing materials

Abstract

With the fast development of military equipment, the competition between radar detection and stealth technology has become the focus of the air battle. When the flight speed of aircraft exceeds...

Progress in controllable bioorthogonal catalysis for prodrug activation

“…9(e)). 88 Under US irradiation, electrons escaped from the surface of the Cu@PAA NCs and transferred between non-equivalent crystallographic sites, generating catalytic Cu(I) for the CuAAC reaction. Using this technique, the valence state transformation between Cu(II) and Cu(I) could be remotely induced, opening the way for controllable catalytic processes in high-level organisms.…”

Lightweight, Compressible, and Multifunctional Organic–Inorganic Nanofibrous Aerogels for Enhanced Microwave Absorption

“…While enjoying these conveniences, unwanted electromagnetic microwave radiation and interference are inevitably generated, which threaten human health and the normal operation of electronic instrument. 1,2 Electromagnetic microwave absorption (EMWA) materials play a key role to eliminate electromagnetic microwave pollution by converting the electromagnetic energy into thermal energy of other forms of energy. 3,4 Various materials, such as ferrites, metallic oxide, ceramics, and carbon materials, have been developed and exhibited promising EMWA performance.…”

“…The ever-increasing popularity of electronic equipment and the quick development of advanced wireless communication systems have brought huge convenience to human society. While enjoying these conveniences, unwanted electromagnetic microwave radiation and interference are inevitably generated, which threaten human health and the normal operation of electronic instrument. , Electromagnetic microwave absorption (EMWA) materials play a key role to eliminate electromagnetic microwave pollution by converting the electromagnetic energy into thermal energy of other forms of energy. , Various materials, such as ferrites, metallic oxide, ceramics, and carbon materials, have been developed and exhibited promising EMWA performance. − Unfortunately, these nanomaterials often have shortcomings like large filler content, narrow absorption bandwidth, and inferior stability, which restrict their actual applications to a certain extent. , To overcome this limitation, it is imperative to design novel EMWA materials with lightweightness, thin thickness, strong absorption, and wide bandwidth.…”

Polymer-derived silicon oxycarbonitride bowls with hollow structures and hetero-nanodomains for electromagnetic wave absorption

“…[1][2][3][4] Polymer-derived ceramics (PDCs) are considered as competitive materials for electromagnetic wave absorption, enjoying advantages such as adaptable precursor structure design, multiple heterogeneous interfaces between transparent and absorption phases, and chemical stability. [5][6][7][8][9][10] However, the microwave absorption performance of PDCs is often hindered by the limited heterogeneous phases produced at low pyrolytic temperatures, and suboptimal impedance matching characteristics between air and PDCs. Addressing these issues, efforts have been dedicated to manufacturing high-performance PDCbased microwave absorbers by refining the composition and crafting structures across different scales.…”