Facile synthesis of novel nitrogen-doped diamond with excellent microwave absorption and thermal conductive performance

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

Diamond and Related Materials Pub Date : 2024-11-15 DOI:10.1016/j.diamond.2024.111789

Chencheng Liu , Tong Zhu , Jing Jia , Yi Zhu , Qingyun Chen , Wei Zhang , Wenlong Zhang , Hui Song , Yuezhong Wang , Nan Jiang

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Abstract

Herein, nitrogen doped polycrystalline diamond was prepared using the microwave plasma chemical vapor deposition (MPCVD) method with H₂–CH₄–N₂ gas sources to achieve excellent electromagnetic (EM) wave absorption and thermal management properties. The effect of the nitrogen content (0 to 50 ppm) on its performance was studied. The 25-ppm nitrogen doped diamond demonstrated excellent EM wave absorption performance, achieving a minimum reflection loss (RL_min) of −44.8 dB at 6.7 GHz and a maximum effective absorption band (EAB) of 5.4 GHz (3.7–9.1 GHz). The superior absorption performance could be attributed to synergistic attenuation mechanisms including dipole and interface polarization, conduction loss, eddy current loss, and magnetic polarization, intensified by nitrogen vacancy centers. This multifunctional material, combining high thermal conductivity with effective low-frequency EM wave absorption, showed promise for applications in 5G communications and electronic devices.

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轻松合成具有优异微波吸收和导热性能的新型掺氮金刚石

本文采用微波等离子体化学气相沉积（MPCVD）方法，在 H2-CH4-N2 气体源中制备了掺氮多晶金刚石，以获得优异的电磁波吸收和热管理性能。研究了氮含量（0 至 50 ppm）对其性能的影响。氮含量为 25ppm 的掺氮金刚石表现出优异的电磁波吸收性能，在 6.7 GHz 时的最小反射损耗 (RLmin) 为 -44.8 dB，最大有效吸收带 (EAB) 为 5.4 GHz (3.7-9.1 GHz)。优异的吸收性能可归因于协同衰减机制，包括偶极子和界面极化、传导损耗、涡流损耗和磁极化，并由氮空位中心强化。这种多功能材料兼具高热导率和有效的低频电磁波吸收能力，有望应用于 5G 通信和电子设备。

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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.