Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (3): 20250360.doi: 10.7503/cjcu20250360

• Materials Chemistry • Previous Articles     Next Articles

Three-dimensional Si3N4-BN Ceramic Framework Prepared by in-situ Combustion Synthesis for Thermal Conductivity Enhancement of Epoxy Composites

CAO Xinpeng1,3, MENG Qing2(), DAI Haoyu1,3(), JIANG Lei1,3   

  1. 1.Laboratory of Bio?Inspired Smart Interface Science,Technical Institute of Physics and Chemistry,Beijing 100190,China
    2.State Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China
    3.School of Future Technology,University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2025-11-28 Online:2026-03-10 Published:2025-12-24
  • Contact: MENG Qing, DAI Haoyu E-mail:mengqing@mail.ipc.ac.cn;daihaoyu@iccas.ac.cn
  • Supported by:
    the National Natural Science Foundation of China(92263205)

Abstract:

Accompanied with the great progress on highly integrated soft electric devices consistent with Moore’s law, the demand for heat management with high efficiency is increasing, which makes the polymer-based heat dissipating materials attract intensive interest from both scientific and industrial communities. Therefore, to meet the demand, the construction of thermal conduction network in the polymer matrix is essential to improve the thermal conductivity of a polymer composites. Herein, a three-dimensional Si3N4-BN ceramic(3D-SNBN) framework was effectively prepared within one step in-situ combustion synthesis using low-cost Si, B2O3 and α-Si3N4 as raw materials and polymethylmethacrylate(PMMA) as pore-forming agent. High-performance epoxy composites(SNBN/EP) were then prepared by impregnating epoxy resin(EP) into the 3D-SNBN framework. The thermal conductivity of the composites with a 3D-SNBN framework loading of 57.9%(volume fraction) was as high as 6.4 W·m-1·K-1, which exhibited a significant enhancement of 2809% and 644% compared with pure EP(0.22 W·m-1·K-1) and epoxy composites with conventional randomly dispersed Si3N4-BN powders(0.86 W·m-1·K-1). In addition, the composites exhibited outstanding thermal behaviors during heating and cooling processes accordingly, which further demonstrates their reliability and wide application potential in industrial heat management. The discovery not only provides a feasible material candidate for heat transfer in the future, but also offers a general strategy in high thermal conductive polymer matrix design and preparation.

Key words: High thermal conductivity, Polymer composites, Porous Si3N4-BN ceramic, In?situ combustion synthesis, Heat management

CLC Number: 

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