Polycrystalline magnesium aluminate (MgAl₂O₄) spinel (PMAS) exhibits a unique combination of physical, chemical, mechanical, and optical properties, which makes it useful for a wide range of applications, including UV lenses for lithography, electroinsulation, and structural windows for both VIS and IR region radiation and armor applications. Conventional two‐stage processing of PMAS involves prolonged pressureless sintering followed by hot isostatic pressing. The costly processing of high‐quality transparent PMAS ceramic is the main reason for the limited usage of this material in industry. Spark plasma sintering (SPS) is a relatively novel one‐stage, rapid, and cost‐effective sintering technique, which holds great potential for producing high‐quality optical materials. Here, recent advances in the fabrication of transparent PMAS by the SPS approach, the influence of sintering parameters on microstructure evolution during densification, and their effects on the optical and mechanical properties of the material are reviewed.

中文翻译：

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放电等离子烧结制备透明多晶铝酸镁尖晶石

多晶铝酸镁（MgAl ₂ O ₄）尖晶石（PMAS）具有物理，化学，机械和光学特性的独特组合，使其可用于多种应用，包括用于光刻，电绝缘的UV透镜以及用于VIS和IR区域辐射的结构窗口以及装甲应用。PMAS的常规两阶段加工包括长时间的无压烧结，然后进行热等静压。昂贵的高质量透明PMAS陶瓷加工是该材料在工业中使用受限的主要原因。火花等离子体烧结（SPS）是一种相对新颖的单阶段，快速且经济高效的烧结技术，在生产高质量光学材料方面具有巨大潜力。在此，通过SPS方法制造透明PMAS的最新进展，