High-Thermal-Conductivity AlN Filler for Polymer/Ceramics Composites |
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Authors: | Shoichi Kume Ikuko Yamada Koji Watari Isao Harada Kenshi Mitsuishi |
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Affiliation: | National Institute of Advanced Industrial Science and Technology (AIST), Anagahora, Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan; Mitsui Chemicals Inc., Shiodome City Center, Higashi-Shinbashi, Minato-ku, Tokyo 105-7117, Japan |
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Abstract: | To increase the thermal conductivity of polymer/ceramic composites, aluminum nitride (AlN) granules were added as a ceramic filler. Granules, sintered at 1850°C for 24 h, showed a very high conductivity of 266±26 W (m·°C)?1, as measured by a thermal microscope equipped with thermoreflectant and periodic heating techniques. This conductivity exceeds 80% of the theoretical value of AlN. Ceramic fillers consisting of the obtained AlN granules and commercially available hexagonal boron nitride particles (h-BN) powder plus polyimide resins were mixed and then molded at 100 MPa and 420°C in a vacuum. The resultant composite showed a high conductivity of 9.3 W (m·°C)?1. This study demonstrates that a high-thermal-conductivity filler effectively enhances the conductivity of polymer/ceramic composites. |
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