https://scholars.lib.ntu.edu.tw/handle/123456789/633721
標題: | The Enhanced Thermal Stability of (Mg0.95Ni0.05)2TiO4 Dielectric Ceramics Modified by a Multi-Phase Method | 作者: | Shen, Chun-Hsu Shen, Ting-Wei Hsieh, Tsai-Yu Lan, Kai-Chun Hsu, Shen-Hsien Wang, Ching-Hsuan Lin, Yu-Ting WEN-FANG WU Tseng, Zong-Liang |
關鍵字: | dielectric ceramic; radio frequency; thermal stability | 公開日期: | 10-四月-2023 | 卷: | 16 | 期: | 8 | 來源出版物: | Materials (Basel, Switzerland) | 摘要: | The thermal stability of (Mg0.95Ni0.05)2TiO4 dielectric ceramics has been improved by mixing with CaTiO3 phases owing to higher positive temperature coefficients. The pure (Mg0.95Ni0.05)2TiO4 and the mixture phase systems of CaTiO3-modified (Mg0.95Ni0.05)2TiO4 were verified by XRD diffraction patterns to ensure the crystallite of different phases. The microstructures of the CaTiO3-modified (Mg0.95Ni0.05)2TiO4 were observed by SEM and EDS to investigate the relation between element ratios and grains. As a result, it can be seen that the thermal stability of the CaTiO3-modified (Mg0.95Ni0.05)2TiO4 can be effectively enhanced, compared with the pure (Mg0.95Ni0.05)2TiO4. Moreover, the radio frequency dielectric performances of CaTiO3-modified (Mg0.95Ni0.05)2TiO4 dielectric ceramics are strongly dependent upon the density and the morphology of the specimens. The champion sample with the ratio of (Mg0.95Ni0.05)2TiO4 and CaTiO3 of 0.92:0.08 showed an εr value of 19.2, an Qf value of 108,200 GHz, and a τf value of -4.8 ppm/°C, which may encourage (Mg0.95Ni0.05)2TiO4 ceramics to broaden the range of novel applications and match the requirements of 5G or next-generation communication systems. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/633721 | ISSN: | 1996-1944 | DOI: | 10.3390/ma16082997 |
顯示於: | 機械工程學系 |
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