Recent advances in ALON optical ceramic

Ultrafast Z-scan measurements of nonlinear optical constants of window materials at 772, 1030, and 1550 nm

“…Recent developments in optical ceramics and glasses have led to new materials for visible and infrared transmitting windows. The linear optical and mechanical properties as well as the thermo-optic behavior of the new materials-MgAl 2 O 4 (spinel), aluminum oxynitride (AlON), multispectral ZnS (CLEARTRAN), and barium gallogermanate glass (BGG)-have been extensively studied [1][2][3][4][5][6]. While these linear optical properties are now known, only ZnS [7] nonlinear optical properties have been thoroughly studied.…”

Frictional Investigation for Magnetorheological Finishing (MRF) of Optical Ceramics and Hard Metals

“…The hard ceramics included aluminum oxynitride (ALON) [5], polycrystalline alumina (PCA) [6], chemical/composite vapor deposited silicon carbide (CVD [7] and CVC [8] SiC), and tungsten carbide (WC) (non-magnetic, either nickel based [9] or binderless [10]). ALON, and PCA are used for applications such as domes, windows, transparent armor, and lenses, which require transmission from the visible through the mid IR, along with excellent mechanical and thermal properties [11,12]. SiC, the hardest material chosen for this study, can be fabricated to achieve high reflectivity in vacuum UV and X-ray for mirror applications [13].…”

Aqueous Slip Casting of Transparent Aluminum Oxynitride

“…Aluminum oxynitride (AlON) is an isotropic cubic polycrystalline ceramic material transparent to the electromagnetic radiation in the region between 0.22 and 6 μm. Due to its excellent optical properties combined with high strength and hardness values, it is useful in various applications such as transparent armors, supermarket scanner windows, IR windows and domes, windows for laser, ceramic semiconductors, and as a low‐cost alternative to sapphire . AlON has been produced through various routes such as carbothermal nitridation of alumina, nitridation of γ‐alumina and aluminum metal, carbothermal reduction of gibbsite, reaction between alumina and BN, and gas‐phase reaction of aluminum chloride .…”