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Fabrication and dielectric properties of Si 3 N 4 -MgO-Al 2 O 3 by spark plasma sintering technique
| Content Provider | Semantic Scholar |
|---|---|
| Author | Li, Junyang Chen, Fei Shen, Qiang Jiang, Hui Zhang, Lianmeng |
| Copyright Year | 2007 |
| Abstract | In the present study, α-Si3N4 was prepared using MgO and Al2O3 as the sintering additives and spark plasma sintering (SPS) technique. The SPS sintering behaviour and mechanism have been discussed. The relationship between the content of sintering additives, sintering temperature, and relative densities of the samples have been analyzed. The phase composition was determined by XRD, the microstructures of the fracture surfaces were observed by SEM and the dielectric properties have been tested. The results suggest that when the sintering temperature is 1300–1500 oC, the content of sintering additives – 6–10%, the relative density of the sintered samples is 64–96%. When the sintering temperature reaches 1400 oC, the content of sintering additives 10%, the samples could be fully dense sintered (the relative density up to 95%) The sintering mechanism is liquid phase sintering. The electric permittivity of the sintered samples is 5–8 being in a close relationship with the relative density. The dielectric loss, influenced by the liquid phase, is less than 1×10. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.materialsscience.pwr.wroc.pl/bi/vol25no3/articles/ms_14jial.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
