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A simple method to improve dielectric property of SiC powder

XIAOLEI SU1,* , WANCHENG ZHOU2, JIE XU1, JUNBO WANG1, XINHAI HE1, CHONG FU1

Affiliation

  1. College of Mechanical& Electronic Engineering, Xi’an Polytechnic University, Xi’an Shaanxi, 710048 P. R. China
  2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an Shaanxi, 710072, P. R. China

Abstract

Aluminum-doped silicon carbide powders were synthesized via solid state reaction of Si/C system at 1600 in Ar atmosphere, using aluminum powder as the dopant, which were investigated by X-ray diffraction (XRD) and scanning electronic microscope (SEM). The electric permittivities of the prepared powders were determined in the frequency range of 8.2–12.4 GHz. The dielectric real part ε′ and imaginary part ε″ of undoped powder have minimum values (ε′ = 5.5–5.3, ε″ =0.23–0.20), and increase with increasing aluminum content. The mechanism of dielectric loss by doping has been discussed..

Keywords

Silicon carbide, Dielectric property, Solid state reaction.

Citation

XIAOLEI SU, WANCHENG ZHOU, JIE XU, JUNBO WANG, XINHAI HE, CHONG FU, A simple method to improve dielectric property of SiC powder, Optoelectronics and Advanced Materials - Rapid Communications, 5, 12, December 2011, pp.1292-1295 (2011).

Submitted at: Nov. 11, 2011

Accepted at: Nov. 24, 2011