US 11,691,922 B2
Ceramic composite and method of preparing the same
Ming-Hui Chang, Hsinchu County (TW); Hsueh-Ping Weng, Kaohsiung (TW); Sheng-Min Yu, Taoyuan (TW); and Kai-Hsiang Chuang, Hsinchu County (TW)
Assigned to INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, Hsinchu (TW)
Filed by Industrial Technology Research Institute, Hsinchu (TW)
Filed on Dec. 9, 2021, as Appl. No. 17/547,099.
Claims priority of application No. 110131249 (TW), filed on Aug. 24, 2021.
Prior Publication US 2023/0076574 A1, Mar. 9, 2023
Int. Cl. C04B 35/581 (2006.01); C04B 22/02 (2006.01); C04B 35/65 (2006.01)
CPC C04B 35/581 (2013.01) [C04B 22/02 (2013.01); C04B 35/65 (2013.01); C04B 2235/46 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of preparing a ceramic composite, comprising:
mixing an aluminum slag and a carbon accelerator to obtain a mixture, wherein the aluminum slag comprises aluminum, oxygen, nitrogen, and magnesium, a weight ratio of the oxygen to the aluminum is 0.6 to 2, a weight ratio of the nitrogen to the aluminum is 0.1 to 1.2, and a weight ratio of the magnesium to the aluminum is 0.04 to 0.2; and
reacting the mixture at a temperature equal to or greater than 1600° C. in a nitrogen atmosphere to obtain the ceramic composite, wherein the ceramic composite comprises aluminum nitride accounting for at least 90 wt % of the ceramic composite.