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Gel-tape-casting of aluminum nitride ceramics

Journal of Advanced Ceramics volume 6, pages 67–72 (2017)Cite this article

Abstract

Aluminum nitride ceramic sheets were formed for the first time by a novel and simple method, namely gel-tape-casting process, where only two additives were used to prepare the slurries. PIBM (a water-soluble copolymer of isobutylene and maleic anhydride) acted as both dispersant and gelling agent, and PEG (polyethylene glycol) acted as plasticizer. Combining the advantages of gel-casting and tape-casting processes, flexible and uniform green tapes were obtained. The rheological properties of AlN slurries were studied to optimize the PIBM content and solids loading. After drying and debinding, the green sheets were sintered at 1840 °C in N2 atmosphere. Homogeneous microstructure with average grain size of about 7 μm was observed in the final AlN ceramics. Thermal conductivity of the AlN ceramics was 161 W/(m·K).

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Affiliations

  1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China

    Qiushun Shang, Zhengjuan Wang, Jun Li, Guohong Zhou, Hailong Zhang & Shiwei Wang

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Qiushun Shang

Authors
  1. Qiushun Shang
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  2. Zhengjuan Wang
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  3. Jun Li
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  4. Guohong Zhou
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  5. Hailong Zhang
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  6. Shiwei Wang
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Corresponding authors

Correspondence to Jun Li or Shiwei Wang.

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This article is published with open access at Springerlink.com

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Shang, Q., Wang, Z., Li, J. et al. Gel-tape-casting of aluminum nitride ceramics. J Adv Ceram 6, 67–72 (2017). https://doi.org/10.1007/s40145-016-0211-3

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  • DOI: https://doi.org/10.1007/s40145-016-0211-3

Keywords

  • AlN ceramic sheets
  • gel-tape-casting
  • PIBM
  • rheological properties
  • microstructure