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Novel Temperature Stable Li 2 MnO 3 Dielectric Ceramics with High Q for LTCC Applications
Novel microwave dielectric ceramics in the Li 2 MnO 3 system with high Q prepared through a conventional solid‐state route had been investigated. All the specimens exhibited single phase ceramics sintered in the temperature range 1140°C–1230°C. The microwave dielectric properties of Li 2 MnO 3 ceram...
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| Published in: | Journal of the American Ceramic Society 2014-06, Vol.97 (6), p.1918-1922 |
|---|---|
| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
| Citations: | Items that this one cites Items that cite this one |
| Online Access: | Get full text |
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| Summary: | Novel microwave dielectric ceramics in the
Li
2
MnO
3
system with high
Q
prepared through a conventional solid‐state route had been investigated. All the specimens exhibited single phase ceramics sintered in the temperature range 1140°C–1230°C. The microwave dielectric properties of
Li
2
MnO
3
ceramics were strongly correlated with sintering temperature and density. The best microwave dielectric properties of ε
r
= 13.6,
Q × f
=
97 000 (GHz), and τ
f
= −5.2 ppm/°C could be obtained as sintered at 1200°C for 4 h.
BaCu
(
B
2
O
5
) (
BCB
) could effectively lower the sintering temperature from 1200°C to 930°C and slightly induced degradation of the microwave dielectric properties. The
Li
2
MnO
3
ceramics doped with 2 wt%
BaCu
(
B
2
O
5
) had excellent dielectric properties of ε
r
= 11.9,
Q × f
=
80 600 (GHz), and τ
f
= 0 ppm/°C. With low sintering temperature and good dielectric properties, the
BCB
added
Li
2
MnO
3
ceramics are suitable candidates for
LTCC
applications in wireless communication system. |
|---|---|
| ISSN: | 0002-7820 1551-2916 |
| DOI: | 10.1111/jace.12871 |