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Si3N4 ceramics were prepared by gas pressure sintering at 1900°C for 12 h under a nitrogen pressure of 1 MPa using Gd2O3 and MgSiN2 as sintering additives. The effects of the Gd2O3/MgSiN2 ratio on the densification, microstructure, mechanical properties, and thermal conductivity of Si3N4 ceramics were systematically investigated. It was found that a low Gd2O3/MgSiN2 ratio facilitated the thermal diffusivity...
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