Sintered reaction-bonded silicon nitride (SRBSN) with high thermal conductivity was obtained using (Y_0.96Eu_0.04)₂O₃ and MgO as sintering additives. Green compacts were nitrided at 1400°C for 4 h. Post-sintering was carried out at 1850 and 1900°C for 4 h, respectively. In reaction-bonded silicon nitride (RBSN) doped with Y₂O₃ and MgO, the β-Si₃N₄ content and nitridation degree were 51.1% and 93.8%, respectively. However, the β-Si₃N₄ content and nitridation degree were 72.6% and 96.7% in a nitrided compact doped with (Y_0.96Eu_0.04)₂O₃ and MgO. After post-sintering, the phase composition, microstructure, mechanical properties, and thermal conductivity were investigated. After sintering at 1900°C for 4 h, the thermal conductivity of SRBSN doped with (Y_0.96Eu_0.04)₂O₃ and MgO was increased by 16.5% compared to that of the samples doped with Y₂O₃ and MgO. The highest hardness of 1639 HV and the good flexural strength of 776.4 MPa were also achieved in the sample doped with 2-mol.% (Y_0.96Eu_0.04)₂O₃ and 5-mol.% MgO.

中文翻译：

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添加 (Y0.96Eu0.04)2O3 提高烧结反应结合氮化硅的导热性和弯曲强度

_{使用(Y 0.96} Eu _0.04 ) ₂ O ₃和MgO作为烧结助剂获得了具有高导热性的烧结反应结合氮化硅(SRBSN) 。生坯在 1400°C 下氮化 4 小时。后烧结分别在 1850 和 1900°C 下进行 4 小时。_{Y 2} O ₃和MgO掺杂反应结合氮化硅(RBSN)中β-Si ₃ N ₄含量和氮化度分别为51.1%和93.8%。而掺杂(Y _0.96 Eu _0.04 )的氮化压块的β-Si ₃ N _{4含量和氮化度分别为72.6%和96.7%。2} O ₃和MgO。后烧结后，研究了相组成、微观结构、机械性能和导热性。在1900℃下烧结4小时后，与掺杂Y ₂ O ₃和MgO的样品相比，掺杂(Y _0.96 Eu _0.04 ) ₂ O ₃和MgO的SRBSN的热导率提高了16.5% 。掺杂2-mol.% (Y _0.96 Eu _0.04 ) ₂ O ₃和5-mol.% MgO的样品也达到了1639 HV的最高硬度和776.4 MPa的良好弯曲强度。