期刊論文
| 學年 | 94 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2006-01-14 |
| 作品名稱 | Novel reaction mechanism for the synthesis of Ba2Ti9O20 materials prepared from nano-sized oxides |
| 作品名稱（其他語言） | |
| 著者 | 林諭男; Lin, I-nan; 朱立文; Chu, Li-wen; Hsiue, Ging-ho; Lin, I-nan; Chen, Yi-chun |
| 單位 | 淡江大學物理學系 |
| 出版者 | Institute of Physics (IOP) |
| 著錄名稱、卷期、頁數 | Nanotechnology 17(1), pp.185-191 |
| 摘要 | In this work, the phase evolution during calcinations of a BaTiO3 and TiO2 mixture was investigated. Based on the observations, a model for the reaction sequence of the phases was proposed and a modified process was suggested, namely to synthesize Ba2Ti9O20 materials utilizing a BaTi4O9 and BaTi5O11 mixture, instead of a BaTiO3 and TiO2 mixture, as starting materials. The phase transformation kinetics is thus greatly enhanced by this process. While the reaction of the 2BaTiO3+7TiO2 mixture requires 1100 °C/4 h to transform completely into the Ba2Ti9O20 Hollandite-like phase, it needs only 1000 °C/4 h to fulfil the phase transformation process in the BaTi5O11+BaTi4O9 mixture. The BaTi5O11+BaTi4O9 mixture also leads to higher sinterability and more uniform granular structure, as compared to the 2BaTiO3+7TiO2 mixture, when these powder mixtures were densified by a direct sintering process. Furthermore, local microwave dielectric properties measured by an evanescent microwave probe (EMP) reveals that the grains of Ba2Ti9O20 materials prepared from the BaTi5O11+BaTi4O9 mixture possess larger dielectric constant than 2BaTiO3+7TiO2 derived ones, indicating that the BaTi5O11+BaTi4O9 mixture has higher reactivity for the formation of the Ba2Ti9O20 Hollandite-like phase. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 0957-4484 |
| 期刊性質 | 國外 |
| 收錄於 | |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | GBR |
| 公開徵稿 | |
| 出版型式 | ,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/27698 ) |