Studies on Structural, Microwave Dielectric Properties, and Low-Temperature Sintering of 1.52Li₂O-0.36Nb₂O₅-1.34TiO₂ Ceramic

Abstract:

The structure, microwave dielectric properties and low-temperature sintering of a new Li2O-Nb2O5-TiO2 system ceramic with the Li2O: Nb2O5: TiO2 mole ratio of 1.52: 0.36: 1.34 have been investigated in this study. The 1.52Li2O-0.36Nb2O5-1.34TiO2 (LNT) ceramic is composed of two phases, the “M-Phase” and Li2TiO3 solid solution (Li2TiO3ss) phase. This new microwave dielectric ceramic has low intrinsic sintering temperature ( ~ 1100 oC ) and good microwave dielectric properties of middle permittivity (εr ~38.6), high Q×f value up to 7712 GHz, and near zero τf value (~ 4.64 ppm/oC). In addition, the sintering temperature of the LNT ceramics could be lowered down effectively from 1100 oC to 900 oC by adding 1 wt.% B2O3. Good microwave dielectric properties of εr = 42.5, Q*f =6819 GHz and τf = 2.7 ppm/oC could be obtained at 900 oC, which indicate the ceramics would be promising candidates for low-temperature co-fired ceramics (LTCC) applications.

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 1226-1230
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.1226
• Online since: June 2012
• Authors: Qun Zeng, Yong Heng Zhou
• Keywords: 1.52Li₂O-0.36Nb₂O₅-1.34TiO₂ Ceramic, B₂O₃, Microwave Dielectric Properties

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