Gelating and Drying Process of Aqueous Gelcasting Aluminum Nitride Ceramics. (29th November 2014)

• Record Type: Journal Article
• Authors: Guo, Jian; Sun, Yongjian; Qiu, Tai; Xue, Wang; Yang, Haiyan
• Is Part Of: International journal of applied ceramic technology. Volume 12:(2015)Supplement 3
• Page Start: E23
• Page End: E32
• Publication Date: 2014-11-29
• Subjects: Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/ijac.12355
• Languages: English
• ISSNs: 1546-542X

Abstract

Abstract : In this study, aluminum nitride (AlN) ceramics were first prepared by aqueous gelcasting. The effect of various parameters such as concentration of N, N ‐dimethylacrylamide (DMAA, as monomers), N, N ′‐methylenbisacrylamide (MBAM, as cross‐linking agent), ammonium persulfate amount (APS, as initiator), solid content and polymerization temperature on AlN ceramics was discussed for aqueous gelcasting system. Finally, drying methods of aqueous gelcasting AlN green bodies were investigated. Aqueous gelcasting AlN ceramics, sintered at 1850°C for 4 h, had homogeneous grain size and little grain boundary phase, and the relative density, flexural strength and thermal conductivity of aqueous gelcasting AlN ceramics were 99.9%, 333(±10) MPa, 136(±9) W/(m·K), respectively.