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Erschienen in:
04.07.2017
The effects of TiO2 addition on the phase formation and microwave dielectric properties of CaLa4Ti5O17 ceramic
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 20/2017
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Abstract
The ceramics in (1 − x) CaLa4Ti5O17-xTiO2 (0 ≤ x ≤ 0.1) series were fabricated via conventional solid-state mix oxide sintering route. Their phase and microwave dielectric properties were investigated. Ca0.1La0.60TiO3 formed as the major phase while CaLa4Ti5O17 formed as secondary phase for the composition with x = 0. The addition of TiO2 content suppressed the formation of the parent CaLa4Ti5O17 phase that finally disappeared and Ca0.1La0.60TiO3 was formed as the only phase. The addition of TiO2 increased εr, Q
u
f
o
and τf values. In the present study, ε
r
~ 155, Q
u
f
o
~ 12678 GHz and τ
f
~ 8.9 was achieved for the composition with x = 0.1 sintered at 1450 °C for 4 h.