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Rapid Communication | Open Access

Gel-tape-casting of aluminum nitride ceramics

Qiushun SHANGa,b, Zhengjuan WANGa, Jun LIa( ), Guohong ZHOUa, Hailong ZHANGa, Shiwei WANGa( )
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
University of Chinese Academy of Sciences, Beijing 100049, China
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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 ℃ 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).

Keywords

AlN ceramic sheetsgel-tape-castingPIBMrheological propertiesmicrostructure

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Journal of Advanced Ceramics
Volume 6 Issue 1,
March 2017
Pages 67-72
DOI: 10.1007/s40145-016-0211-3

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Cite this article:
SHANG Q, WANG Z, LI J, et al. Gel-tape-casting of aluminum nitride ceramics. Journal of Advanced Ceramics, 2017, 6(1): 67-72. https://doi.org/10.1007/s40145-016-0211-3

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Received: 05 September 2017
Revised: 09 March 2018
Accepted: 10 March 2017
Published: 02 March 2017
© The author(s) 2016

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