Microwave absorption ceramics pyrolyzed from poly(dimethylsilylene)diacetylene‐modified hyperbranched polyborosilazane DOI

Xi Hu,

Geqing Zhang,

Haodong He

et al.

Journal of the American Ceramic Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

Abstract Polymer‐derived ceramics (PDCs) are typically prepared as ceramic‐based microwave absorption materials by doping with high‐dielectric or transition metals, which may lead to the issue of uneven mixing. This study achieves uniform blending at molecular level using poly(dimethylsilylene)diacetylenes (PDSDA) modify hyperbranched polyborosilazane (PBSZ). The alkynyl group and Si−H bonds crosslink form a ceramic precursor, is then pyrolyzed prepare SiBCN excellent performance high temperature stability. introduction PDSDA significantly improved yield, resulting in situ formation more ordered carbon, SiC nanocrystals, nanowires within ceramics. These nanophases uniformly dispersed throughout matrix, enhancing ceramic's dielectric loss properties. After 1400°C, derived from precursor PBSZ:PDSDA mass ratio 10:1 exhibits electromagnetic wave properties, minimum reflection −50.11 dB maximum effective bandwidth 3.11 GHz. Moreover, maintain stability 1500°C both argon air environments. fully exploits designability molecules, providing new approach for preparation PDCs route.

Language: Английский

Prussene: Transforming ancient pigments into magnetic nanoalloyed 2D layers DOI

Shizhuo Zhang,

Feng Liu, Senlin Rao

et al.

Matter, Journal Year: 2025, Volume and Issue: unknown, P. 102090 - 102090

Published: March 1, 2025

Language: Английский

Citations

0
Multiple heteroatom doped carbon nanocages with an open structure enabling superior electromagnetic wave absorption DOI

Sitong Sha,

Nan Wang,

J. P. Cheng

et al.

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137498 - 137498

Published: April 1, 2025

Language: Английский

Citations

0
Nanoconfinement Strategy for Lightweight Feconi/N-Doped Carbon Nanotubes with Broadband Electromagnetic Absorption DOI

Shengyuan Liang,

Junjie Wang, Desheng Jiang

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Pb single-atoms on nitrogen-doped graphene hollow spheres for electromagnetic wave absorption DOI
Yang Sun, Yanan Shi, Xiao Zhang

et al.

Carbon, Journal Year: 2025, Volume and Issue: unknown, P. 120352 - 120352

Published: April 1, 2025

Language: Английский

Citations

0
Microwave absorption ceramics pyrolyzed from poly(dimethylsilylene)diacetylene‐modified hyperbranched polyborosilazane DOI

Xi Hu,

Geqing Zhang,

Haodong He

et al.

Journal of the American Ceramic Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

Abstract Polymer‐derived ceramics (PDCs) are typically prepared as ceramic‐based microwave absorption materials by doping with high‐dielectric or transition metals, which may lead to the issue of uneven mixing. This study achieves uniform blending at molecular level using poly(dimethylsilylene)diacetylenes (PDSDA) modify hyperbranched polyborosilazane (PBSZ). The alkynyl group and Si−H bonds crosslink form a ceramic precursor, is then pyrolyzed prepare SiBCN excellent performance high temperature stability. introduction PDSDA significantly improved yield, resulting in situ formation more ordered carbon, SiC nanocrystals, nanowires within ceramics. These nanophases uniformly dispersed throughout matrix, enhancing ceramic's dielectric loss properties. After 1400°C, derived from precursor PBSZ:PDSDA mass ratio 10:1 exhibits electromagnetic wave properties, minimum reflection −50.11 dB maximum effective bandwidth 3.11 GHz. Moreover, maintain stability 1500°C both argon air environments. fully exploits designability molecules, providing new approach for preparation PDCs route.

Language: Английский

Citations

0