Construction of boron carbide phase to improve the thermal insulation and mechanical properties of carbon aerogel

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2025-02-25 DOI:10.1016/j.diamond.2025.112150

Hongli Liu , Wenjing Zu , Wenjin Yuan , Peng Chu , Yuhao Liu , Weiqiang Xie , Yao Song , Kun Yu , Chenghao Bian , Ziyang Peng

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Abstract

Carbon aerogels with nanoporous structures provide enormous potential applications in diverse fields. However, traditional carbon aerogels failed to satisfy the requirements for both thermal insulation and mechanical properties. In this paper, boron-modified carbon aerogels (B/CA), based on linear phenolic resin precursors and phenylboronic acid, are prepared by supercritical drying and high-temperature carbonization. During the carbonization process, a small amount of boron carbide phase is formed. Heat will be consumed due to multiple reflections at the phase interface, which improves the thermal insulation properties. Besides, these boron carbide grains can efficiently disperse the stress load and enhance the mechanical properties of the carbon aerogels. The resulting B/CAs possess low density (0.203 g cm⁻³), high compressive strength (1.94 MPa), and low thermal conductivity (0.0475 W·m⁻¹·K⁻¹ at 25 °C). These integrated superiorities make B/CA have great application prospects in high temperature insulation, especially in harsh conditions.

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.