西安建筑科技大学教师个人主页 dingdonghai--Home-- Effects of thermal oxidation on electromagnetic interference shielding

Personal Information

Doctoral Supervisor
Master Tutor
(Professor)
Name (Pinyin):
dingdonghai
School/Department:
材料科学与工程学院
Education Level:
PhD student
Business Address:
工科楼1302
Gender:
Male
Contact Information:
手机号（微信）：13468604786
Degree:
Doctoral degree
Professional Title:
Professor
Status:
Employed
Academic Titles:
西安建筑科技大学材料学院高温陶瓷研究所副所长
Other Post:
受邀担任Carbon.CompositesA.CeramicsInternational.MaterialsScienceandEngeeringB等10余种国际期刊审稿人；西安发改委评审专家。
Alma Mater:
西北工业大学
Discipline:
Materialogy

Affiliation of Author(s):
材料科学与工程学院
Journal:
Ceramics International Conference on Advances in Chemical Technologies for Water and Wastewater Treatment（CCS-Xian2008）
Key Words:
中文关键字：电磁屏蔽，英文关键字：SiCf/SiC composites; Electromagnetic interference
Abstract:
SiCf/SiC composites containing PyC interphase were prepared by chemical vapor infiltration and their properties were investigated for electromagnetic interference (EMI) shielding applications in the frequency of 8.2–12.4 GHz. The room temperature direct current electrical conductivity (sdc) and EMI shielding effectiveness (SE) were tested after thermal oxidation for various time at 900 1C. It was found that the EMI was shielded mainly by absorption for both as-received and oxidized SiCf/SiC composites. Both sdc and SE of SiCf/ SiC composites decrease after thermal oxidation at 900 1C. It was proposed that the free carbon, including PyC interphase and free carbon in matrix and fibers, mainly determines the EMI SE of composites. The decrease of sdc and SE of composites after oxidation are attributed to the consumption of free carbon. The SE of SiCf/SiC composites with a thickness of 2 mm remains above 15 dB after thermal oxidation for 4 h in air at 900 1C.
Note:
丁冬海
First Author:
dingdonghai
Indexed by:
Journal paper
Volume:
卷：39
Issue:
期：4
Page Number:
页：4281-4286
Translation or Not:
no
Date of Publication:
2013-04-01