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Pulsed electric current sintering of transparent Cr-doped Al2O3 |
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| Authors: | Khanh Quoc DangShinichi Takei Masakazu KawaharaMakoto Nanko |
| Affiliation: | a Department of Mechanical Engineering, Nagaoka University of Technology, Kamitomiokamachi 1603-1, Nagaoka, Niigata 940-2188, Japan b SINTERLAND Inc., 123 Amaike, Nagaoka, Niigata 940-2055, Japan c SPS SYNTEX Inc., 3-2-1 Sakato, Takatsu, Kawasaki, Kanagawa 213-0012, Japan |
| Abstract: | Pulsed electric current sintering (PECS) was applied to obtain transparent ruby polycrystals. Al2O3-Cr2O3 powder mixture was prepared by drying an aqueous slurry consisting of Al2O3 and Cr(NO3)3 followed by PECS consolidation in vacuum at a sintering temperatures ranging from 1100 to 1300 °C with various heating rates between 2 and 100 °C/min and under an applied pressures from 40 to 100 MPa. Slow heating rate and high-pressure lead to highly densified and transparent Cr-doped Al2O3 polycrystals at sintering temperature of 1200 °C. |
| Keywords: | B grain size Pulsed electric current sintering Transparent Cr-doped Al2O3 |
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