Microwave dielectric characteristics of ceramics in Mg 2SiO 4–Zn 2SiO 4 system
(Mg 1− x Zn x ) 2SiO 4 ceramics were prepared and characterized. The densification temperatures of the present ceramics are much lower than those for Mg 2SiO 4 and Zn 2SiO 4 end-members. Small solid solution limits of Zn in Mg 2SiO 4 and Mg in Zn 2SiO 4 are observed, and the bi-phase structure is co...
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Published in | Ceramics international Vol. 34; no. 4; pp. 917 - 920 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
2008
|
Subjects | |
Online Access | Get full text |
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Summary: | (Mg
1−
x
Zn
x
)
2SiO
4 ceramics were prepared and characterized. The densification temperatures of the present ceramics are much lower than those for Mg
2SiO
4 and Zn
2SiO
4 end-members. Small solid solution limits of Zn in Mg
2SiO
4 and Mg in Zn
2SiO
4 are observed, and the bi-phase structure is confirmed in (Mg
1−
x
Zn
x
)
2SiO
4 ceramics with
x
=
0.1–0.9. Even though, it is clear that the
Qf value of Zn
2SiO
4 ceramics can be significantly improved together with a suppressed temperature coefficient of resonant frequency
τ
f by substituting Mg for Zn. (Mg
0.4Zn
0.6)
2SiO
4 ceramics indicate a good combination of microwave dielectric characteristics:
ɛ
r
=
6.6
Qf
=
95,650
GHz, and
τ
f
=
−60
ppm/°C. |
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ISSN: | 0272-8842 1873-3956 |
DOI: | 10.1016/j.ceramint.2007.09.057 |