http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Zang Xiangrong (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
Dielectric properties and thermal conductivity of Si3N4–SiC composite ceramics
Zang Xiangrong,Li Haiqing,Lu Yanping,Tan Huihui,Ji Huanli,Yan Ming,Liu Zheng 한국세라믹학회 2022 한국세라믹학회지 Vol.59 No.6
In this work, Si 3N4–SiC composite ceramics were prepared by hot pressing sintering with Y 2O3–MgO–Al2O3 as sintering additives in a fl owing nitrogen atmosphere. The crystal structure and microstructure of Si 3N4–SiC specimens with diff erent SiC content were studied. The XRD results show that the peaks of β-Si 3N4 and SiC were displayed and matched well on XRD patterns. Si 3N4 particles were basically long rod-shaped. Besides, the eff ects of SiC content on thermal conductivity and dielectric properties in W band (75–110 GHz) of sintered Si 3N4–SiC ceramics were researched. The dielectric constant fi rst decreased then increased with the increase of SiC content, while the trend of dielectric loss (tg δ) was opposite. The dielectric constant of Si 3N4–SiC composites for 35 wt% SiC reached a minimum range of 13–20 and tg δ values reached a maximum range of 0.72–0.96 in the frequency of 75–110 GHz. Meanwhile, the thermal conductivity of Si 3N4–SiC composites for 35 wt% SiC was 63.008 W/(m K) at room temperature. The variation of thermal conductivity as test temperature was also studied. The thermal conductivity decreased with increasing test temperature. When the test temperature was 300 °C, the thermal conductivity of the Si 3N4–SiC ceramics for 35 wt% SiC content was 36.022 W/(m K). The Si 3N4–SiC composite ceramics were expected to be applied as microwave absorbing materials.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
