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Fabrication and properties of porous silicon nitride ceramics via microwave sintering

  • Mengyong Sun , Xin Cheng , Qinggang Li and Shifeng Huang
Published/Copyright: December 5, 2014
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 105 Issue 12

Abstract

Porous silicon nitride ceramics were fabricated without pore formers via microwave sintering. Microwave sintering at different temperatures produced unique microstructures with high porosity. The best porous silicon nitride ceramics were fabricated at 1550°C for 30 min; the resulting product had a bulk density of 1552 g cm−3, an open porosity of 43.9%, and a flexural strength of 43.6 MPa. The mean pore channel size and the dielectric constants of the fabricated porous silicon nitride ceramics ranged from 0.1 μm to 1 μm and 2.9 to 3.4 under different temperatures, respectively.

Keywords: Microwave sintering; Porous ceramics; Dielectric properties; Silicon nitride
* Correspondence address, Dr. Cheng Xin, Professor, School of Material Science and Engineering, University of Jinan, 336, West Rd of Nan Xinzhuang, Jinan, Shandong, 250022, P.R. China, Tel.: +86-531-82767375, E-mail:

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Received: 2014-02-17
Accepted: 2014-08-01
Published Online: 2014-12-05
Published in Print: 2014-12-08

© 2014, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111137
Keywords for this article
Microwave sintering; Porous ceramics; Dielectric properties; Silicon nitride

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. On the orientation dependence of grain boundary triple line energy in Cu
  5. Hydrogen storage kinetics of as-cast and spun (Mg24Ni10Cu2)100–xNdx (x = 0–20) alloys
  6. Segregation of phosphorus to ferrite grain boundaries during transformation in an Fe–P alloy
  7. A study on the pseudoelasticity of low temperature aged and thermomechanically treated Ti-51.5 at.% Ni shape memory alloy
  8. Experimental determination and thermodynamic calculation of the phase equilibria in the Co–Mn–Ta system
  9. 800°C isothermal section of the Co–Cr–Mo–Si quaternary system
  10. Phase fraction mapping in the as-cast microstructure of extrudable 6xxx aluminum alloys
  11. Effect of thixoforming on morphological changes in iron-bearing intermetallics and mechanical properties of Al–Si–Cu alloys
  12. The superplasticity of friction stir processed Al-5Mg alloy with additions of scandium and zirconium
  13. Short Communications
  14. Anti-corrosion behaviour of VE/GF coatings on mild steel
  15. Intermetallic phase stabilized Al/Pb metallic emulsion
  16. Synthesis of ultrafine powder (W,Ti)C by microwave heating in a stream of argon
  17. Fabrication and properties of porous silicon nitride ceramics via microwave sintering
  18. DGM News
  19. Personal
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