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Effect of grain boundary phase on the thermal conductivity of aluminium nitride ceramics

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Abstract

AIN with high thermal conductivity was fabricated by pressureless sintering with Y2O3 as the sintering aid. The thermal conductivity was observed to increase with sintering time (up to 8 h) at 1810 °C. The distribution of the sintering aid was identified as one of the major factors influencing the thermal conductivity in AIN. Non-uniform distribution of the grain boundary phase was found to be associated with a significant amount of porosity, resulting in the enhancement of phonon scattering and thereby lowering the thermal conductivity.

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Author notes

  1. Ching -Fong Chen

    Present address: Technical Ceramics Division, LECO Corporation, PO Box 211688, 30917, Augusta, GA, USA

  2. M. E. Perisse

    Present address: Saxonburg Ceramics Inc., 16056, Saxonburg, PA, USA

  3. A. F. Ramirez

    Present address: MER Corp., 85706, Tucson, AZ, USA

  4. N. P. Padture

    Present address: NIST, 20899, Gaithersburg, MD, USA

Authors and Affiliations

  1. Keramont Corporation, 85714, Tucson, AZ, USA

    Ching -Fong Chen, M. E. Perisse & A. F. Ramirez

  2. Lehigh University, 18015, Bethlehem, PA, USA

    N. P. Padture & H. M. Chan

Authors
  1. Ching -Fong Chen
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  2. M. E. Perisse
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  3. A. F. Ramirez
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  4. N. P. Padture
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  5. H. M. Chan
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Chen, C.F., Perisse, M.E., Ramirez, A.F. et al. Effect of grain boundary phase on the thermal conductivity of aluminium nitride ceramics. JOURNAL OF MATERIALS SCIENCE 29, 1595–1600 (1994). https://doi.org/10.1007/BF00368932

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  • DOI: https://doi.org/10.1007/BF00368932

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