期刊
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
卷 12, 期 5, 页码 -出版社
NATL INST MATERIALS SCIENCE
DOI: 10.1088/1468-6996/12/5/055003
关键词
translucent zirconia; optical materials; spark plasma sintering; optical properties
资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan [C-22560675]
- Grants-in-Aid for Scientific Research [22560675] Funding Source: KAKEN
Aiming to characterize the effect of sintering temperature on transparency of zirconia, we have evaluated the optical properties and microstructure of translucent cubic zirconia prepared by high-pressure spark plasma sintering (SPS) at 1000-1200 degrees C. Color centers (oxygen vacancies with trapped electrons) and residual pores were primary defects in the samples. In SPS samples, the total forward transmittance and in-line transmittance are mainly affected by color centers with a limited contribution from residual pores; in contrast, the changes in reflectance are only related to the porosity. The amounts of color centers and residual pores increase with sintering temperature that reduces the total forward and in-line transmittance of the as-sintered zirconia. Annealing in oxidizing atmosphere improves the total forward and in-line transmittance. During the annealing, the concentration of color centers decreases but the porosity increases.
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