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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Chen-Chia Chou Yu-Shuan Su Ze-Ming Liu Utami, B.S. Cheng-Sao Chen Li-Wen Chu |
| Copyright Year | 2011 |
| Description | Author affiliation: Department of Mechanical Engineering, National Taiwan Univ. of Sci. and Tech., Taipei 106, ROC (Chen-Chia Chou; Yu-Shuan Su; Ze-Ming Liu; Utami, B.S.) || Department of Mechanical Engineering, Hwa-Hsia Institute of Technology, Taipei 235, Taiwan, ROC (Cheng-Sao Chen) || Walsin Technology Corporation, Kaohsiung 806, Taiwan ROC (Li-Wen Chu) |
| Abstract | Barium titanate material systems are the basic microwave dielectrics attracting particular interests and subject to many researches due to lots of intriguing properties, such as, its high temperature stability, low loss, high dielectric constant etc. at microwave range. However, BaTi4O9 and Ba2Ti9O20 ceramics usually need very high sintering temperatures (∼1300°C and above) to achieve sufficient density. The present work attempts to investigate the microstructures and corresponding electric properties of low temperature co-fired BaTi4O9 microwave dielectric ceramics with copper electrode and B-Si-Ba-Zn-O glass in reducing atmosphere. Experimental results show that specimens of BaTi4O9 ceramics with various glass compositions and Cu-electrode exhibit different colors and can be attributed to glass diffusivity and reaction with Cu element during sintering. Glass composition plays an important role of the mass transportation of glass. B2O3/SiO2 ratio determines glass viscosity and BaO/ZnO ratio contributes to wettability of glass with BaTi4O9 ceramics. In x-ray diffraction patterns, we can observe different Ba-Ti-O phases with various Ba/Ti ratio. Ba4Ti13O30 may form when the BaO content in glass is too high (BaO/ZnO ratio is greater than 2). Instead, the BaTi6O13 appears as the content of BaO is low, such as BaO/ZnO ratio is smaller than 0.75. Both extreme conditions degrade the electrical properties of materials. Appropriate composition of glass not only improves material density during sintering, but also enhances phase stability of dielectrics and electrical properties. |
| Starting Page | 1 |
| Ending Page | 4 |
| File Size | 758882 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781457711626 |
| e-ISBN | 9781457711633 |
| e-ISBN | 9781457711619 |
| DOI | 10.1109/ISAF.2011.6013984 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2011-07-24 |
| Publisher Place | Canada |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Zinc oxide Microwave imaging Erbium Glass X-ray scattering Fires BaTi |
| Content Type | Text |
| Resource Type | Article |
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