Tailoring the microstructure of high porosity Si3N4 foams by direct foaming with mixed surfactants

• Published in: Journal of the American Ceramic Society Vol. 102; no. 11; pp. 6827 - 6836
• Main Authors: Du, Zhongpei, Yao, Dongxu, Xia, Yongfeng, Zuo, Kaihui, Yin, Jinwei, Liang, Hanqing, Zeng, Yu‐Ping
• Format: Journal Article
• Language: English
• Published: Columbus Wiley Subscription Services, Inc 01.11.2019
• Subjects: Ceramics; Compressive strength; direct foaming; Foaming; Foams; high porosity; Microstructure; mixed surfactants; Pore size; Pore size distribution; Porosity; Silicon nitride; Slurries; Surfactants

The mixed surfactants were successfully applied to fabricate the highly porous Si3N4 ceramic foams by the direct foaming method. The oppositely charged surfactants mixed in slurries could combined into catanionic surfactant by the electrostatic attraction and facilitate the formation of ultra‐stable...