文献名： 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

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

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

^c Department 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 –CONH ₂  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.

关键词： Gelcasting ; Isobam ; Gelation mechanism ; AlN