Abstract A novel resistive coupled microwave sintering strategy was developed to sinter yttria-magnesia nanocomposite synthesized by a combustion technique to a density greater than 99% of the theoretical density. A substantial reduction in the sintering temperature and soaking duration were observed in the resistive coupled microwave sintering. The new method yielded pellets with average grain size ~0.15 µm which showed a better transmittance of 82.8% in the mid infrared range and an improved hardness of 10.81 GPa compared to the pellets sintered via resistive heating and susceptor assisted microwave heating. The enhanced hardness and transmittance properties achieved by resistive coupled microwave sintering without affecting the thermal properties is a remarkable result which can be used effectively in fabricating high quality futuristic infrared transparent windows and domes for strategic defence and space missions.

中文翻译：

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电阻耦合微波烧结对红外透明氧化钇-氧化镁复合材料光学、热学和硬度性能影响的综合分析

摘要 开发了一种新型电阻耦合微波烧结策略，将通过燃烧技术合成的氧化钇-氧化镁纳米复合材料烧结到大于理论密度的99%。在电阻耦合微波烧结中观察到烧结温度和均热持续时间的显着降低。与通过电阻加热和基座辅助微波加热烧结的颗粒相比，新方法生产的颗粒平均粒径为 0.15 µm，在中红外范围内显示出更好的透射率 82.8%，硬度提高了 10.81 GPa。