Highly transparent AlON sintered from powder synthesized by direct nitridation

Ethanol‐Water‐Derived Sucrose‐Coated‐Al2O3 for Submicrometer AlON Powder Synthesis

“…Single‐phase AlON is obtained at 1700°C, a temperature at which AlON, Al 2 O 3 and AlN coexists for S 23 E 100 . Our synthesis temperature for single‐phase AlON with sucrose‐coated‐Al 2 O 3 structured S 23 E 85 is lower than those with mechanical AlN/Al 2 O 3 , C/Al 2 O 3 , Al/Al 2 O 3 mixtures (generally 1750°C–1850°C), and even our own mechanical sucrose/Al 2 O 3 mixture of S 23 E 100 .…”

“…According to the weight loss after decarbonization, 23.2 wt% sucrose in precursor corresponds to 5.1 wt% carbon in derived C/Al 2 O 3 mixture, which is within the optimal value of 5.0-6.0 wt% widely employed by other investigators. 5,7,8,11,12 Figure 7 represents the XRD patterns for the final products synthesized at 1650°C-1700°C for 1.5 h after the pretreatment at 1550°C with S 23 E 85 and S 23 with sucrose-coated-Al 2 O 3 structured S 23 E 85 is lower than those with mechanical AlN/Al 2 O 3 , C/Al 2 O 3 , Al/Al 2 O 3 mixtures (generally 1750°C-1850°C), 3,4,[7][8][9][10][11]13…”

“…At present, widely employed methods for AlON powder synthesis include solid-state reaction, 3,4 carbothermal reduction and nitridation (CRN), [5][6][7][8][9][10][11][12] and direct nitridation. 13 Among them, CRN receives the most extensive investigations because of the low cost of the starting materials and the high quality of the final products. However, AlON can hardly be synthesized at temperature below~1650°C due to its thermodynamical instability.…”

Planetary ball‐milling of AlON powder for highly transparent ceramics

“…Traditionally, transparent AlON ceramic is prepared by the following procedures: synthesizing and milling of powder, then shaping of green body and followed by the sintering of the ceramic. Synthesis methods include solid‐state reaction method, aluminothermic reduction nitridation method, and carbothermal nitridation method (CRN) . The synthetic AlON powder can be sintered into ceramics by hot‐pressing method, hot isostatic pressing method, and pressurless sintering method .…”

Photocatalytic properties of aluminum oxynitride (AlON)

“…AlON, a solid solution of the Al 2 O 3 -AlN binary system is a well-known technological material with excellent physicochemical properties [6][7][8]. A stable AlON is a non-stoichiometry compound and thus rich of defect structures.…”