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- Title
Microwave dielectric properties of 3Li<sub>2</sub>O–Nb<sub>2</sub>O<sub>5</sub>–3TiO<sub>2</sub> ceramics with Li<sub>2</sub>O–V<sub>2</sub>O<sub>5</sub> additions.
- Authors
Huanfu Zhou; Hong Wang; Xiaoyan Ding; Xi Yao
- Abstract
A new Li2O–Nb2O5–TiO2 (LNT) ceramic with the Li2O:Nb2O5:TiO2 mole ratio of 3:1:3 has been investigated. The compound is composed of two phases, the Li2TiO3 and “M-phase” solid solution phase. The microwave dielectric ceramic has low sintering temperature (∼1100 °C) and good microwave dielectric properties of a relatively high permittivity (∼51), high Q × f value up to 8700, and small temperature coefficient (∼37 ppm/°C). The low-amount doping of 0.83Li2O–0.17V2O5 (LV) can effectively lower the sintering temperature from 1100 to 900 °C and induce no obvious degradation of the microwave dielectric properties. Typically, the 1 wt.% LV-doped ceramic sintered at 900 °C has better microwave dielectric properties of εr = 51.3, Q × f = 7235 GHz, τ f = 22 ppm/°C, which suggests that the ceramics can be applied in microwave LTCC devices.
- Subjects
ELECTRONIC ceramics; DIELECTRICS; MICROWAVE heating; PERMITTIVITY; SINTERING; LITHIUM compounds; NIOBIUM oxide; TITANIUM dioxide; SEMICONDUCTOR doping
- Publication
Journal of Materials Science: Materials in Electronics, 2009, Vol 20, Issue 1, p39
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-008-9600-x