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Dielectric properties of spark plasma sintering AlN-W composite ceramics 被引量:2
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作者 WANG Jiangyuan JIA Xian +3 位作者 JIA Chengchang DONGGuixia ZHANG Yuli JIA Lei 《Rare Metals》 SCIE EI CAS CSCD 2011年第6期633-638,共6页
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 permitt... 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 A1N-W materials sintered at the temperature of 1700℃ 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 propelties because of the higher porosity. The samples sintered from the starting AlN powder with smaller particle size also had the better properties. 展开更多
关键词 a1n-w ceramic spark plasma sintering dielectric properties powder mixing methods MICROSTRUCTURES
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