Paper Title:
α/β Phase Transformation in Porous Reaction-Bonded Silicon Nitride Ceramics
  Abstract

Porous reaction-bonded silicon nitride ceramics with different values of α/β ratio were obtained by setting the nitriding temperature and time. The influence of α/β phase transformation on the dielectric properties of porous silicon nitride ceramics has been investigated. The results show that the α/β transformation occurs when the nitriding temperature is higher than 1400°C . The values of α/β ratio decrease with increase of nitriding temperature and time. The dielectric constant ε′ and the dielectric loss tan δ of the samples increase because of the α/β transformation, and the change of the dielectric loss is more obvious. The increase of concentrations of point defects due to the α/β transformation leads to the significant increase of the dielectric loss.

  Info
Periodical
Advanced Materials Research (Volumes 194-196)
Edited by
Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang
Pages
2225-2228
DOI
10.4028/www.scientific.net/AMR.194-196.2225
Citation
J. Xu, J. B. Wang, W. H. Cui, X. L. Su, W. C. Zhou, "α/β Phase Transformation in Porous Reaction-Bonded Silicon Nitride Ceramics", Advanced Materials Research, Vols. 194-196, pp. 2225-2228, 2011
Online since
February 2011
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Price
$32.00
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