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Dielectric properties of ultralow-fired MgNbO ceramics co-doped with TiO and LiF.
- Source :
- Journal of Materials Science: Materials in Electronics; Feb2016, Vol. 27 Issue 2, p1553-1557, 5p
- Publication Year :
- 2016
-
Abstract
- The MgNbO co-doped with 20 wt% TiO (MNT) and x wt% LiF (1 ≤ x ≤ 8) composite ceramics were prepared by a solid-state reaction method for developing ultralow-fired (≤800 °C) microwave dielectric ceramics. The sintering temperatures of MNT ceramics were successfully lowered to 750 °C due to the formation of liquid phase (LiF). A secondary phase of MgTiO was observed at above 700 °C for MNT-8 wt% LiF ceramics. All the composite ceramics have the optimal bulk densities at 800 °C, which corresponds to the maximum Q × f value of 32,000 GHz and ɛ value of 15.7. The well microwave dielectric properties of ɛ = 15.6, Q × f = 25,000 GHz, and τ = −56 ppm /°C were obtained at 750 °C for 5 h for MNT-8 wt% LiF ceramics. This material is compatible with Ag electrodes, suitable for low-temperature co-fired ceramics applications. [ABSTRACT FROM AUTHOR]
- Subjects :
- MANGANESE compounds
CERAMIC materials
TITANIUM dioxide
ELECTRODES
LOW temperatures
Subjects
Details
- Language :
- English
- ISSN :
- 09574522
- Volume :
- 27
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science: Materials in Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 112694769
- Full Text :
- https://doi.org/10.1007/s10854-015-3923-1