|
English
|
正體中文
|
简体中文
|
全文笔数/总笔数 : 848/2341 (36%)
造访人次 : 5042253
在线人数 : 62
|
|
|
数据加载中.....
|
jsp.display-item.identifier=請使用永久網址來引用或連結此文件:
http://163.15.40.127/ir/handle/987654321/1616
|
题名: | Dielectric Characteristics of the Lead-free Piezoelectric Ceramics L0.50Na0.50Nb0.95Ta0.05O3 |
作者: | Cheng, Chien-Min Chen, Kai-Huang Yang, Hung-Chi Yang, Cheng-Fu Tzou, Wen-Cheng Kuan, Ming-Chang Jong, Fuh-Cheng Jong 陳開煌 (東方技術學院電子與資訊系) |
贡献者: | 東方技術學院電子與資訊系 |
关键词: | Lead-free Dielectric characteristics Curie temperature |
日期: | 2010-03 |
上传时间: | 2014-03-31 10:33:56 (UTC+8) |
摘要: | In order to improve the sintering density and dielectric properties of the lead-free K0.5Na0.5NbO3-based ceramics, by the use of solid-state reaction, part of the Nb atoms are substituted by the Ta atoms to form K0.5Na0.5Nb0.95Ta0.05O3 ceramics and the dielectric characteristics are detail investigated in this letter. It is found that the phases of K0.5Na0.5Nb0.95Ta0.05O3 ceramics are pure perovskite with typical orthorhombic symmetry, in addition, no other secondary phases could be certified. For pure K0.5Na0.5Nb0.95Ta0.05O3 ceramics, the shapes of the grains are quadrate and which would due to the increase of the porosity and can not be eliminated easily. Because of the phase stability of pure K0.5Na0.5Nb0.95Ta0.05O3 ceramics is limited to 1140 °C in this study, higher sintering temperature (over than 1140 °C) is not suitable for the fabrication of K0.5Na0.5Nb0.95Ta0.05O3 ceramics. Moreover, the Ta atoms in the K0.5Na0.5NbO3-based ceramics could be used to improve the dielectric properties effectively, and it also reveals lower Curie temperature and lower phase transition temperature than the pure K0.5Na0.5NbO3 ceramics. In this letter, for 1120°C-sintered K0.5Na0.5Nb0.95Ta0.05O3 ceramics, the optimum bulk density is 95.6 % of the theorical density, the Curie temperature is 380 °C, and the optimum relative dielectric constant is 6107 at 10 kHz. |
關聯: | Key Engineering Materials, Vol.434-435, pp.286-288 |
显示于类别: | [電子與資訊系(遊戲動畫系、動畫科)] 期刊論文
|
文件中的档案:
档案 |
描述 |
大小 | 格式 | 浏览次数 |
index.html | | 0Kb | HTML | 573 | 检视/开启 |
|
在TFIR中所有的数据项都受到原著作权保护.
|