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- Title
Extrinsic effects on microwave dielectric properties of high-Q MgZrTaO ceramics.
- Authors
Xia, Wang-Suo; Zhang, Lan-Yang; Wang, Ying; Jin, Shao-En; Xu, Yu-Pei; Zuo, Ze-Wen; Shi, Li-Wei
- Abstract
MgZrTaO ceramics with excellent microwave dielectric properties had been prepared through conventional mixed oxide route. All the sintered samples exhibited a single phase with wolframite structure type belonged to P2/c ( C ) space group. The Raman spectrum revealed a similar lattice vibration in all samples with different sintering temperature. Emphatically, the extrinsic effects on microwave dielectric properties had also been investigated. The microwave dielectric properties of MgZrTaO ceramics presented a significant dependence on the sintering condition. The porosity-corrected permittivity (ε-pc) was calculated to investigate the influence of the porosity to the dielectric constant (ε). For the high-dense MgZrTaO ceramics, the main factors which had influences on quality factors (Q × f) were the grain size and grain-size distribution. The temperature coefficient of resonant frequency (τ) was depended on the dielectric constant and pores. The typical microwave dielectric properties of MgZrTaO ceramics were ε = 22.76, Q × f = 131,500 GHz, τ = −33.81 ppm/°C, sintered at 1475 °C.
- Subjects
MAGNESIUM compounds; CERAMIC materials; DIELECTRIC properties; WOLFRAMITE; SINTERING
- Publication
Journal of Materials Science: Materials in Electronics, 2016, Vol 27, Issue 11, p11325
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-016-5256-0