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- Title
Crystal structure and microwave dielectric properties of [(Mg<sub>0.6</sub>Zn<sub>0.4</sub>)<sub>0.95</sub>Co<sub>0.05</sub>]<sub>2</sub>TiO<sub>4</sub>-modified Ca<sub>0.6</sub>La<sub>0.8/3</sub>TiO<sub>3</sub> cordierite ceramics with a near-zero temperature coefficient
- Authors
Chen, Yuan-Bin; Tseng, Zong-Liang; Chen, Lung-Chien; Lin, Chien-Chi; Miao, Hsin-Yuan; Liu, Jih-Hsin; Lin, Shih-Hung
- Abstract
The microstructure and dielectric properties of x[(Mg0.6Zn0.4)0.95Co0.05]2TiO4-(1 − x)Ca0.6La0.8/3TiO3 (x = 0.9-0.96) ceramics prepared via conventional solid-state method were investigated using scanning electron microscopy and a network analyzer. Mixed phases of [(Mg0.6Zn0.4)0.95Co0.05]2TiO4 and Ca0.6La0.8/3TiO3 were detected using X-ray diffraction. The microwave dielectric properties are strongly correlated with the sintering temperature. Temperature coefficient of resonant frequency could be controlled by amount of Ca0.6La0.8/3TiO3 and thus near-zero temperature coefficient value can be obtained. With x = 0.94 sintered at 1175 °C for 4 h, the proposed dielectric material, applicable to microwave devices, has the following dielectric properties: a dielectric constant ~ 18.1, a quality factor value of ~ 156,000 (at 9 GHz), and temperature coefficient of resonant frequency of 1.2 ppm/°C.
- Subjects
CRYSTAL structure; MICROWAVES; DIELECTRIC properties; MICROSTRUCTURE; X-ray diffraction
- Publication
Journal of Materials Science: Materials in Electronics, 2018, Vol 29, Issue 13, p10709
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-018-9137-6