DOI number:10.1111/jace.18767
Journal:Journal of American Ceramic Society
Abstract:Morphology is an important characteristic of raw powder utilized for ceramic sintering but the role of powder morphology is mostly overlooked. In this study, two types of ZrO2-SiO2 powder with different morphologies (fiber and particle) were synthesized by blow spinning and sol-gel method, respectively, followed by DC electric field-assisted hot pressing (FAHP) to obtain nanocrystalline glass-ceramics. Results showed that the two as-synthesized powders had different pyrolysis behaviors. The two types of as-synthesized powders were amorphous and tetragonal-ZrO2 nanocrystallites firstly formed after calcination at 800°C. During FAHP, the particle powder can be densified at a lower temperature than that of the fiber powder, due to the facts that the particle powder showed higher specific surface area and higher densification driving force. The fiber powder was predominately densified by fiber fusion and plastic deformation, whereas, the particle powder was densified via particle fusion. Both the two types of powder can be fully densified to obtain ZrO2-SiO2 nanocrystalline glass-ceramics (NCGCs) at 1230°C for 4 mins. Tetragonal-ZrO2 nanocrystallites in the NCGCs with particles as raw powder showed higher stability than those in the NCGCs with fibers as raw powder.
Co-author:Lei Li, Yongxin Cheng, Bohan Wang, Hui Wu
First Author:Le Fu*
Indexed by:Journal paper
Volume:106
Issue:1
Page Number:1-16
Translation or Not:no
Included Journals:SCI
Links to published journals:https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.18767