The paper presents the development of unique processing methods for large alumina windows, domes, and thin sheets with a fine-grained structure and high optical transmission. Gelcasting combined with post-hot isostatic pressing proved to be a suitable processing method for windows and domes. This method provided alumina ceramics with a real in-line transmission of up to 72 % at a wavelength of 633 nm and with a theoretical in-line transmission in the infrared region between 1500 and 4000 nm for 0.8 mm thick bodies. Complex-shaped bodies, domes, were prepared with minimum warping during sintering. Thin transparent alumina sheets were prepared by gel-tape casting. This novel tape casting method utilized the advantages of the gelcasting method. The real in-line transmission of the tapes was lower compared with the windows. Nevertheless, the thin tapes with a thickness below 350 μm exhibited reasonable transparency even after pressureless sintering and without a polishing of sintered samples.

本文介绍了具有大颗粒结构和高透光率的大型氧化铝窗，圆顶和薄板的独特加工方法的发展。凝胶浇铸与后热等静压相结合被证明是一种适用于窗户和圆顶的加工方法。这种方法为氧化铝陶瓷提供了在633 nm波长下实际在线透射率高达72％的特性，并且对于0.8 mm厚的物体在1500至4000 nm的红外区域具有理论上的在线透射率。在烧结过程中以最小的翘曲准备了复杂形状的主体（圆顶）。通过凝胶胶带流延制备薄的透明氧化铝片。这种新颖的流延法利用了凝胶浇铸法的优点。与窗口相比，磁带的实际在线传输率更低。不过，