Department of Materials Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva, 84105, Israel.
Head of Materials Division, R&T Base Unit, DDR&D IMOD, Hakirya, Tel Aviv, 61909, Israel.
Adv Mater. 2018 Oct;30(41):e1706283. doi: 10.1002/adma.201706283. Epub 2018 Jun 19.
Polycrystalline magnesium aluminate (MgAl O ) 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.
多晶尖晶石氧化铝（MgAl2O4）具有独特的物理、化学、机械和光学性能，广泛应用于光刻 UV 透镜、电绝缘、可见光和红外辐射结构窗以及装甲等领域。多晶尖晶石氧化铝的传统两段式工艺包括长时间的无压烧结和随后的热等静压。高质量透明多晶尖晶石陶瓷的昂贵加工成本是该材料在工业中应用受限的主要原因。火花等离子烧结（SPS）是一种相对较新的、快速且具有成本效益的烧结技术，在制备高质量光学材料方面具有巨大潜力。本文综述了 SPS 法制备透明多晶尖晶石氧化铝的最新进展，以及烧结参数对致密化过程中微观结构演变的影响及其对材料光学和机械性能的影响。
