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Fabrication and characterization of porous mullite ceramics from pyrolysis of alumina powders filled silicone resin

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Abstract

Porous mullite ceramics were fabricated from pyrolysis of nanometer alumina powders filled silicone resin. At 1573 K, the mixture of nanometer γ-Al2O3 and silicone resin can be entirely transformed to mullite in air. The effects of shaping pressure on microstructure and mechanical property were investigated. Increasing shaping pressure leads to decrease in open porosity and average pore size, narrower pore size distribution, and improvement in flexural strength. With a shaping pressure of 43 MPa, nanoporous mullite ceramics with an average pore size of 50 nm can be obtained, showing 33% in open porosity and 42 MPa in flexural strength. The microstructure of porous mullite ceramics consists of dense region and loose region.

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Authors and Affiliations

  1. Science and Technology on Advanced Ceramic Fibers & Composites Laboratory, National University of Defense Technology, Changsha, 410073, China

    Qingsong Ma  (马青松) & Hao Tian

Authors
  1. Qingsong Ma  (马青松)
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  2. Hao Tian
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Corresponding author

Correspondence to Qingsong Ma  (马青松).

Additional information

Funded by the Hunan Provincial Natural Science Foundation of China (No. S2010J504B) and the National Natural Science Foundation of China (No. 91116001)

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Ma, Q., Tian, H. Fabrication and characterization of porous mullite ceramics from pyrolysis of alumina powders filled silicone resin. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 28, 1082–1084 (2013). https://doi.org/10.1007/s11595-013-0823-1

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  • DOI: https://doi.org/10.1007/s11595-013-0823-1

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