The Nearby Dual-Nanocarbon of Cno/Tio2/Sio2/Cc Nanohybrids with Multi-Interfaces For High-Temperature Microwave Absorption

Abstract

An ideal and distinctive microwave-absorbing carbon-based material feature an eco-friendly, low-cost fabrication process combined with high loss efficiency and strong absorption potential. Here we design an innovative nanohybrids with carbon nano onion (CNO) from paraffin ultra-pure lamp oil by flame method awning unique structure to boost up the dielectric loss. And TiO2 is introduced for efficient microwave absorption loss through an in-situ process using C7H8O and TiCl4, while SiO2 plays a critical role in controlling the dielectric constant through the use of tetraethyl orthosilicate (TEOS). To boost up the nanohybrids effective loss mechanism the material is exposed to a carbon capsule (CC) utilizing acetylene (C2H2) as a carbon source for 5 minutes under argon to prepare CNO/TiO2/SiO2/CC nanohybrids. The nearby dual-nanocarbon forms multi-level interfaces enhancing the multi-level rebound and microwave absorption of the microwave interfaces. The as-designed CNO/TiO2/SiO2/CC has effective minimum reflection loss (RLmin) value of -54.4 dB and the maximum effective absorption bandwidth (EABmax) of 5.5 GHz at a thickness of 1.9 mm. It also has good thermal conductivity. Hence, this work confirms that high-performance nanohybrids derived from paraffin ultra-pure lamp oil are promising candidates, providing a novel approach for the design and development of carbon-based microwave absorbers.

Keywords: Carbon nano onion, CNO/TiO2/SiO2/CC nanohybrids, dielectric loss, Microwave absorption