Fabrication and characterization of highly transparent Y2O3 ceramics by hybrid sintering: A combination of hot pressing and a subsequent HIP treatment |
| |
Authors: | Lin-Lin Zhu Young-Jo Park Lin Gan Ha-Neul Kim Jae-Woong Ko Hai-Doo Kim |
| |
Affiliation: | 1. Engineering Ceramics Department, Korea Institute of Materials Science 797 Changwondaero, Changwon, Gyeongnam, 641-831, Republic of Korea;2. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for Green Preparation and Application of Functional Materials, School of Material Science and Engineering, Hubei University, 368 Youyi Avenue, Wuhan, Hubei, 430062, China |
| |
Abstract: | We succeeded in the optimization of highly transparent Y2O3 ceramics with a submicrometer grain size approximately 0.6?μm by hot pressing (1300–1550?°C) and a subsequent HIP (1450?°C) treatment using commercial Y2O3 powders as starting powders and ZrO2 as a sintering additive. The optimum microstructure for the HIP treatment was prepared by hot pressing at a temperature as low as 1400?°C for 3?h with a relative density of 99.3%. The thus HIP-treated specimen showed the best transmittance (2?mm thick) ever reported of 83.4% and 78.3% at 1100 and 400?nm, respectively. Specifically, the transmittance using this hybrid sintering method improved substantially in the visible range compared to that of the counterpart using hot pressing only. A simulation of the transmittance based on the Beer-Lambert law and Mie scattering theory has proved that this improvement is mainly due to the elimination of nanopores below 15?nm in size. |
| |
Keywords: | Transparent ceramics Process optimization Hybrid sintering |
本文献已被 ScienceDirect 等数据库收录! |
|