Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 92, Issue 6, Pages 1208-1216Publisher
WILEY
DOI: 10.1111/j.1551-2916.2009.03074.x
Keywords
-
Categories
Funding
- Amada Foundation [AF-2008016]
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan [19760497]
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
- Grants-in-Aid for Scientific Research [19760497] Funding Source: KAKEN
Ask authors/readers for more resources
By controlling the heating rate at <10 degrees C/min during spark-plasma-sintering (SPS) processing, transparent polycrystalline spinel with an in-line transmission of 50% and 70% in the visible- and infrared-wavelengths, respectively, can be successfully fabricated for only a 20-min soak at 1300 degrees C. The high transmission can be attained by reducing the residual porosity and pore size, which was achieved by the low-heating rate. At high heating rates, many closed pores are formed due to the high densification rate during the heating process and remain as large pores around grain junctions. At temperatures >1300 degrees C, the coalescence of the residual pores and the precipitation of second phases, which are caused by rapid grain growth, degrade the transparency. The present study demonstrates that although the high heating rates have been regarded as a primary advantage for the SPS processing, the low heating rate is highly effective in attaining a high transparency in the spinel even at low temperatures and for short sintering times.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available