A novel formula for the quality factor calculation for the multiphase microwave dielectric ceramic mixtures. Issue 10 (August 2017)

• Record Type: Journal Article
• Authors: Chen, Hetuo; Tang, Bin; Zhong, Chaowei; Yuan, Ying; Zhang, Shuren
• Is Part Of: Journal of the European Ceramic Society. Volume 37:Issue 10(2017)
• Page Start: 3347
• Page End: 3352
• Publication Date: 2017-08
• Subjects: Classical dispersion theory -- Maxwell-Wagner formula -- Quality factor; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.04.006
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Microwave dielectric ceramics are pillar materials in the microwave applications, for example, resonators. However, because most ceramics possess non-zero temperature coefficients, two or more ceramics, with temperature coefficient of opposite signs, are always mixed as a multiple phase system to obtain a zero temperature coefficient ceramic. While the dielectric constant can be calculated by the Maxwell-Wagner based formula, the quality factor ( Q ) is usually hard to be precisely calculated by the conventional method. In this paper, basing on the classical dispersion theory, we derive a new formula for the Q calculation for the ceramic mixtures. The deviation between the calculated and reported Q, of several typical ceramic systems, is around ±5%, for the example of two phases ceramic mixtures.