Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5437647 | Ceramics International | 2017 | 6 Pages |
Abstract
Silicon nitride-based composite ceramics with different contents of magnesium titanate have been fabricated via gas pressure sintering method. The phase compositions, microstructure, mechanical performances and dielectric properties of the composite ceramics were investigated. The density of the Si3N4-based composite ceramics firstly increased with additive of magnesium titanate powder up to 5Â wt% and then gently decreased, and the mechanical properties firstly increased and then declined. Besides, the dielectric constant and dielectric loss increased with the increase of magnesium titanate contents. For the Si3N4-based composite ceramics with 5Â wt% magnesium titanate powders, the flexural strength, elastic modulus, dielectric constant and dielectric loss reached 451Â MPa, 274Â GPa, 7.65, 0.0056, respectively. These results suggested that the magnesium titanate was beneficial for the improvement of mechanical performances and dielectric constant of Si3N4-based composite ceramics.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Ling Li, Li Gu, Wuhua Yuan, Jie Zhang,