Journal of Inorganic Materials ›› 2013, Vol. 28 ›› Issue (12): 1333-1337.DOI: 10.3724/SP.J.1077.2013.13041

• Research Paper • Previous Articles     Next Articles

Preparation and Microwave Absorption Properties of CB/PBO Composite

WANG Li, LUO Fa, LIU Li, ZHOU Wan-Cheng, ZHU Dong-Mei   

  1. (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China)
  • Received:2013-01-16 Revised:2013-04-01 Published:2013-12-20 Online:2013-11-15
  • About author:WANG Li. E-mail:
  • Supported by:

    National Natural Science Foundation of China (51072165)

Abstract: TA salt was prepared by the solution of 4,6-diaminon1,3-benzenediol and terephthalic acid, and then copolymerized in PPA to get poly(p-phenylene benzobisoxazole) (PBO) with good thermal resistance. Using as-prepared PBO as matrix, carbon black (CB) as absorber, CB/PBO composites were fabricated by hot pressing. Influences of CB weight concentration on complex permitivity and on thermal properties of CB/PBO composites were investigated. The results show that the real and imaginary parts of permittivity are increased with the increase of carbon black concentration. The reflectivity bandwidth and reflection loss lower than -10 dB are about 2.4 GHz and -32 dB, respectively, when CB weight concentration is 5% and the thickness of composite is 2 mm. The mass loss of PBO and CB/PBO composite are 11.84% and 21.99%, respectively, when kept at 450℃ for 5 h.

Key words: PBO, thermal property, complex permittivity, composite, carbon black

CLC Number: