Abstract
Fine nanoparticles (NPs) exhibit higher sintering activity than large ones and are usually desired for sintering of nanocrystalline (NC) ceramics with fine grains. This paper demonstrates that large α-Al2O3 polycrystalline (PC) NPs with a mean particle size of 62nm show a similar sintering activity as α-Al2O3 single-crystal (SC) NPs with a mean particle size of 16nm.α-Al2O3 NC ceramics sintered from the 62nm α-Al2O3 PC NPs and 16nm α-Al2O3 SC NPs by two-step sintering exhibit a similar mean grain size of about 75nm and a similar relative density of about 99.5%. It may be because the 62nm α-Al2O3 PC NPs and 16nm α-Al2O3 SC NPs have a similar mean grain size of about 19nm. These results imply that NC ceramics with fine grains may be sintered from large PC NPs with fine grain sizes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.