Dispersion of nano-TiN powder in aqueous media

作者：Guo Zhixing; Xiong Ji^*; Yang Mei; Xiong Sujian; Chen Jianzhong; Wu Yuemei; Fan Hongyuan; Sun Lan; Wang Jun; Wang Hui

来源：Journal of Alloys and Compounds, 2010, 493(1-2): 362-367.

DOI：10.1016/j.jallcom.2009.12.103

• Powder processing
• Transmission electron microscopy (TEM)
• Infrared (IR) spectroscopy
• X-ray photoelectron spectroscopy (XPS)
• Nanocrystalline materials

Dispersion of nano-TiN powder in aqueous media is investigated, which remains a big challenge during the preparation of Ti(C,N)-based nano-cermet. TEM images show that ultrasonic treatment for 30 min is proved to be optimal, while excessive increase of ultrasonic treatment time to 1 h does not result in better dispersion. XPS spectra reveal the existence of TiO(2), which results in hydroxylated surface of the nano-TiN powder. Based on the surface properties of TiN particles, Tween 80, a non-ion polymer, is selected as the surfactant. FTIR analysis shows that Tween 80 is evidently absorbed on the surface of TiN particles. Zeta potential of the TiN suspension is influenced by pH value following the electrostatic stabilization mechanism. In the presence of Tween 80, the zeta potential values appear to be more negative with the shift of pH(IEP) from 3.6 to 3.1, and homogenous dispersion of nano-TiN is achieved by the stereo-hindrance effect.

• 出版日期2010-3-18
• 单位四川大学