Effects of Y2O3–MgO nanopowders content on mechanical and dielectric properties of porous BN/Si3N4 composites
Source abstract
Abstract
Abstract Porous BN/Si3N4 composites with different Y2O3–MgO nanopowders have been fabricated by a pressureless sintering method. The densification, phase evolution, microstructure, mechanical properties and dielectric properties of the BN/Si3N4 composites were investigated. The density and mechanical properties of the porous BN/Si3N4 composite ceramics firstly increased with addition of Y2O3–MgO up to 20 wt% and then decreased, while the dielectric properties gently declined as the Y2O3–MgO contents increased. For the porous BN/Si3N4 composites with 20 wt% Y2O3–MgO nanopowders, the porosity, flexural strength and dielectric constant reached 21.9%, 243.6 MPa and 5.5, respectively, which indicated that the composites could be one of the candidates for wave-transparent applications.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Microwave Dielectric Ceramics Synthesis · Magnesium Oxide Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (28)
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