Microwave Dielectric Properties of Mn-Doped Ba4.5Sm9Ti18O54 Ceramics |
| Journal |
Key Engineering Materials (Volumes 280 - 283) |
| Volume |
High-Performance Ceramics III |
| Edited by |
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li |
| Pages |
5-8 |
| DOI |
10.4028/www.scientific.net/KEM.280-283.5 |
| Online since |
February, 2007 |
| Authors |
Jian Mei Xu,
Dong Xiang Zhou,
Dao Li Zhang,
Guo Hua Huang,
Shu Ping Gong
|
| Keywords |
Dielectric Property, Manganese Dioxide Dopant, Microwave Dielectric Ceramics |
| Abstract |
The different amounts of manganese dioxide were doped to Ba4.5Sm9Ti18O54 (BST)ceramics. It was found that the doping sequence of Mn had serious influences on the microwave dielectric properties of the BST ceramics. When manganese dioxide was added before the mixtures were calcined, the dielectric properties of ceramics were poor and decreased with the increase of the
Mn content. When the Mn content was between 2.0wt% and 3.0wt%, the BST ceramics had no microwave characteristic. But adding manganese dioxide in a range of 0.0 to 1.0wt% after the mixtures were calcined enhanced the microwave dielectric properties of the BST ceramics. When the Mn content changed from 0 to 1.0wt%, the microwave properties of the BST ceramics increased, but the microwave properties decreased while the Mn content was over 1.0wt%. The ceramics with 3.0wt% Mn content had also no microwave characteristic. The optimum microwave dielectric properties were as follows: εr=76, Q·f=7280,τf=-3.6ppm/k. |
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