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High performance and dense Si3N4 ceramic prepared by gelcasting combined with reaction re-sintering method.
- Source :
-
Ceramics International . Sep2024:Part B, Vol. 50 Issue 17, p30794-30801. 8p. - Publication Year :
- 2024
-
Abstract
- In this study, Si powder was used as raw material, Si 3 N 4 powder as a diluent, Al 2 O 3 , MgO, Y 2 O 3, and La 2 O 3 as sintering additives to prepare Si 3 N 4 ceramic with excellent properties using gelcasting and reaction re-sintering method. When the solid content of the slurry is 57.3 %, the viscosity is less than 1 Pa · s during the gelcasting process. After the reaction re-sintering, the sintered body of Si 3 N 4 exhibited a bulk density of 3.15 ± 0.05 g/cm3, a relative density of 96 ± 1 %, open porosity of 5.7 %, bending strength of 610 ± 20 MPa, elastic modulus of 235 ± 10 GPa, thermal conductivity of 48 ± 5 W/(m·K), and a linear shrinkage rate of 12–13 %. These parameters indicate that Si 3 N 4 ceramic possesses outstanding mechanical properties and thermal conductivity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 50
- Issue :
- 17
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 178090968
- Full Text :
- https://doi.org/10.1016/j.ceramint.2024.05.384