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Journal of Advanced Ceramics

, Volume 2, Issue 2, pp 180–184 | Cite as

Thermal properties of AlN polycrystals obtained by pulse plasma sintering method

  • Paweł J. RutkowskiEmail author
  • Dariusz Kata
Open Access
Research Article

Abstract

Aluminum nitride (AlN) polycrystals were prepared by pulse plasma sintering (PPS) technique. The starting AlN powder mixtures were composed with 3.0 wt%, 5.0 wt% and 10 wt% of yttrium oxide (Y2O3), respectively. Relative density of each polycrystal was measured by hydrostatic method and evaluated higher than 97%. X-ray diffraction (XRD) method was used for phase examination of the samples after heat treatment. Microstructure examination supported by computer-aided analysis was performed by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The results were correlated with thermal conductivity of the samples carried out by laser pulse method (LFA). The influence of the rapid sintering technique and yttrium oxide additive content on the thermal conductivity and microstructure appearance of AlN polycrystals was clearly shown.

Keywords

aluminum nitride (AlN) thermal conductivity microstructure thermal diffusivity specific heat 

References

  1. [1]
    Baik K, Drew RAL. Aluminum nitride: Processing and applications. Key Eng Mat 1996, 122–124: 553–570.CrossRefGoogle Scholar
  2. [2]
    Axelbaum RL, Lottes CR, Huertas JI, et al. Gas-phase combustion synthesis of aluminum nitride powder. Twenty-Sixth Symposium (International) on Combustion/The Combustion Institute, 1996: 1891–1897.Google Scholar
  3. [3]
    Campbell CK. Applications of surface acoustic and shallow bulk acoustic wave devices. Proc IEEE 1989, 77: 1453–1484.CrossRefGoogle Scholar
  4. [4]
    Tiegs TN, Kiggans Jr. JO. High thermal conductivity lossy dielectric using codensified multilayer configuration. U.S. Patent 6579393, June 2003.Google Scholar
  5. [5]
    Rutkowski P, Kata D. The influence of aluminum nitride polycrystal annealing time on its thermal conductivity. Ceram Mater 2013, 65 (in Polish, in press).Google Scholar
  6. [6]
    Komeya K, Tatami J. Liquid phase sintering of aluminum nitride. Mater Sci Forum 2007, 554: 181–188.CrossRefGoogle Scholar
  7. [7]
    Jankowski K, Kata D, Lis J. Preparation of polycrystalline aluminum nitride with yttria additive. Ceram Mater 2012, 64: 214–218 (in Polish).Google Scholar
  8. [8]
    Jackson TB, Virkar AV, More KL, et al. High-thermal-conductivity aluminum nitride ceramics: The effect of thermodynamics, kinetics and microstructural factors. J Am Ceram Soc 1997, 80: 1421–1435.CrossRefGoogle Scholar
  9. [9]
    Xu GF, Olorunyolemi T, Wilson OC, et al. Microwave sintering of high-density, high thermal conductivity AlN. J Mater Res 2002, 17: 2837–2845.CrossRefGoogle Scholar
  10. [10]
    Rutkowski P, Kata D, Lis J. Thermal conductivity of polycrystalline AlN. Ceram Mater 2012, 64: 572–576 (in Polish).Google Scholar
  11. [11]
    Michalski A. Pulse plasma sintering of ceramics materials. Ceramics 2005, 91: 379–385.Google Scholar
  12. [12]
    Bellosi A, Esposito L, Scafè E, et al. The influence of microstructure on the thermal conductivity of aluminum nitride. J Mater Sci 1994, 29: 5014–5022.CrossRefGoogle Scholar
  13. [13]
    Craft S, Moody B, Dalmau R, et al. Thermal expansion engineering for polycrystalline aluminum nitride sintered bodies. U.S. Patent 2012/0146023 A1, June 2012.Google Scholar
  14. [14]
    Li MJ, Zhang LM, Shen Q, et al. Microstructure and properties of spark plasma sintered AlN ceramics. J Mater Sci 2006, 41: 7934–7938.CrossRefGoogle Scholar

Copyright information

© The Author(s) 2013

This article is published under license to BioMed Central Ltd. Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  1. 1.Department of Ceramics and Refractories, Faculty of Materials Science and CeramicsAGH University of Science and TechnologyKrakowPoland

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