A novel aerogels/porous Si3N4 ceramics composite with high strength and improved thermal insulation property
Source abstract
Abstract
Abstract A novel ZrO2-SiO2 aerogels/porous Si3N4 ceramics composite with high strength, low density, good dielectric properties and low thermal conductivity was synthesized by filling ZrO2-SiO2 aerogels into the porous Si3N4 ceramics through vacuum sol-impregnating. The effects of aerogels on the microstructure and properties of composite were discussed. The results show that aerogels could form a mesoporous structure and significantly decrease the thermal conductivity from 9.8 to 7.3 W m−1 K−1. Meanwhile, the density, mechanical and dielectric properties of the porous Si3N4 ceramics could not be affected after introducing ZrO2-SiO2 aerogels. The composite exhibits high porosity (62.6%), high flexural strength (53.86 MPa) and low dielectric constant (2.86). The ZrO2-SiO2 aerogels/porous Si3N4 ceramics composite shows great potential as radome materials applied in the fields of aerospace.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aerogels and thermal insulation · Advanced ceramic materials synthesis · Silicone and Siloxane Chemistry
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (29)
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