M. Valant—contributing editor
Microwave Dielectric Properties of Li2WO4 Ceramic with Ultra-Low Sintering Temperature
Article first published online: 10 JAN 2011
© 2011 The American Ceramic Society
Journal of the American Ceramic Society
Volume 94, Issue 2, pages 348–350, February 2011
How to Cite
Zhou, D., Randall, C. A., Pang, L.-X., Wang, H., Guo, J., Zhang, G.-Q., Wu, X.-G., Shui, L. and Yao, X. (2011), Microwave Dielectric Properties of Li2WO4 Ceramic with Ultra-Low Sintering Temperature. Journal of the American Ceramic Society, 94: 348–350. doi: 10.1111/j.1551-2916.2010.04312.x
This work was financially supported by the National 973-project of China (2009CB623302), National Project of International Science and Technology Collaboration (2009DFA51820) and NSFC projects of China (109790365, 60871044, and 50835007). The National Science Foundation I/UCRC program, as part of the Center for Dielectric Studies under Grant No. 0628817, for partial support.
- Issue published online: 7 FEB 2011
- Article first published online: 10 JAN 2011
- Manuscript No. 28626. Received September 18, 2010; approved November 2, 2010.
A new ultra-low-temperature firing microwave dielectric ceramic, Li2WO4 with the phenacite structure, was prepared via solid-state reaction method. The Li2WO4 ceramic can be well sintered at 640°–660°C, with a microwave relative permittivity ∼5.5, a Q×f value about 62 000 GHz, and a negative temperature coefficient of −146 ppm/°C at 15.7 GHz. From an X-ray diffraction analysis, the Li2WO4 ceramic was found to be chemically compatible with both silver and aluminum powders at 640°C. All the results indicate that the Li2WO4 ceramic is a promising candidate for ultra-low temperature cofired ceramic technology, especially for dielectric substrate application.