High-Q microwave dielectrics in the (Mg1-xZnx)Al2O4 (x=0-0.1) system

作者：Huang Cheng Liang^*; Chien Yu Hua; Tai Chen Yi; Huang Chi Yuen

来源：Journal of Alloys and Compounds, 2011, 509(9): L150-L152.

DOI：10.1016/j.jallcom.2010.12.202

• Crystal growth
• Dielectric response

The microwave dielectric properties and the microstructures of (Mg1-xZnx)Al2O4 (x = 0-0.1) ceramic system prepared by the conventional solid-state route were investigated. The forming of spinel-structured (Mg1-xZnx)Al2O4 (x = 0-0.1) solid solutions was confirmed by the XRD patterns and the measured lattice parameters, which linearly varied from a = b = c = 8.0815 angstrom for MgAl2O4 to a = b = c= 8.0828 angstrom for (Mg0.9Zn0.1)Al2O4. By increasing x, the Q x f of (Mg1-xZnx)Al2O4 can be tremendously boosted from 82,000 GHz at x = 0 to a maximum of 156,000 GHz at x = 0.05. The Zn substitution was effective in reducing the dielectric loss without detrimental effects on the epsilon(r) and tau(f) values of the ceramics.

• 出版日期2011-3-3