Dielectric properties of spark plasma sintering AlN-W composite ceramics |
| |
| Authors: | Jiangyuan Wang Xian Jia Chengchang Jia Guixia Dong Yuli Zhang Lei Jia |
| |
| Affiliation: | WANG Jiangyuana,JIA Xiana,c,JIA Chengchanga,DONG Guixiab,ZHANG Yulia,and JIA Leia a School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China b School of Materials Science and Engineering,Hebei United University,Tangshan 063009,China c Journals Publishing Center,China |
| |
| Abstract: | In order to develop AlN composites suitable for high average power electronic tube, AlN-W materials were prepared by spark
plasma sintering. The effects of manufacture parameters on dielectric loss tangent and permittivity constant were investigated,
which include powder-mixed method, milling time of high-energy ball milling, starting powder particle size, sintering temperature
and holding time and adding amount of the conductive second phase. The results showed that AlN-W materials sintered at the
temperature of 1700°C holding for 5 min with 10 vol.% W showed the best dielectric loss tangent larger than 0.81 at the frequency
1 kHz-1 MHz. In addition, magnetic stirring mixed powder and lower sintering temperature led to the better properties because
of the higher porosity. The samples sintered from the starting AlN powder with smaller particle size also had the better properties. |
| |
| Keywords: | AlN-W ceramic spark plasma sintering dielectric properties powder mixing methods microstructures |
| 本文献已被 CNKI 维普 SpringerLink 等数据库收录！ |
|
