Sintering and dielectric properties of (Ta2O5)1−x(TiO2)x polycrystalline ceramics

被引:0
作者
Yue Wang
Xue-wen Zhu
Yi-jian Jiang
机构
[1] Beijing University of Technology,College of Applied Science
[2] Beijing University of Technology,National Center of Laser Technology
来源
Journal of Electroceramics | 2008年 / 21卷
关键词
(Ta; O; ); (TiO; ); Dielectric properties; Sintering temperature;
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摘要
(Ta2O5)1−x(TiO2)x system ceramics has been studied intensively as a promising dielectric material for next generation of high density dynamic random access memories instead of SiO2 and Si3N4. It is found that the dielectric permittivity of (Ta2O5)1−x(TiO2)x ceramics was dependent of fabrication process. But in the previous work, their calcining and sintering time were too long, generally for 24 h or even more. A relatively quick sintering process was provided which calcining and sintering time can be decreased to 12 h at 1200°C and 1 h at 1550°C, respectively. This kind of sintering process can save a lot of energy and time that is in favor of the industrial production. Under this sintering process, the composition dependent dielectric properties of (Ta2O5)1−x(TiO2)x ceramics have been studied in a wide range of composition (0.01 ≤ x ≤ 0.20), and the dielectric constants of most compositions can be drastically enhanced. The maximum dielectric value can reach 216 at composition x = 0.04. In the meantime, the mechanism of improvement of ceramic dielectric constants sintered at 1550°C was also discussed.
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页码:577 / 580
页数:3
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