文獻名： Investigation of gelation mechanism and the effects of APS on AlN slurries with Isobam

作者： Ning Ding^ab, Yi-Ru Zhi^ab, Pei-Pei Tian^ab, Hai Jiang^c, Wen Lei^ab, Gui-Fen Fan^ab, Xiao-Hong Wang^ab, Wen-Zhong Lu^ab

^aSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, China

^bKey Lab of Functional Materials for Electronic Information(B), MOE, Huazhong University of Science and Technology, Wuhan, 430074, China

^cDepartment of Microelectronic Science and Engineering, Ningbo University, Ningbo, 315211, China

摘要：A novel and simple gelling system based on a water-soluble copolymer of isobutylene and maleic anhydride (commercial name, Isobam) was adopted to manufacture various ceramics via spontaneous gelation. The gelation mechanism of AlN slurry was investigated using infrared spectroscopy. Results show that Isobam was hydrolyzed to produce the –COOH group, and the hydrogen bonding was formed between the –COOH and –CONH₂ groups of Isobam during spontaneous gelation. Meanwhile, the gelling process of the Isobam system could be accelerated via enhancing hydrogen bonding through APS addition. With 1 wt% addition of APS, the gelation time reduced to 23 h, the viscosity of 50 vol% AlN slurry decreased to 0.21 Pa·s, and the flexural strength of green body improved by 48%. Therefore, the presence of hydrogen bonding in the Isobam gelation mechanism was confirmed, and it could be enhanced by introducing APS to accelerate gelation.

關(guān)鍵詞：Gelcasting; Isobam; Gelation mechanism; AlN