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Erschienen in:
01.01.2014
Low temperature cofirable Li2Zn3Ti4O12 microwave dielectric ceramic with Li2O–ZnO–B2O3 glass additive
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 1/2014
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Abstract
The effects of Li2O–ZnO–B2O3 (LZB) glass additive on the sintering behavior, phase composition, microstructure and microwave dielectric properties of Li2Zn3Ti4O12 ceramics were investigated. The addition of a small amount of LZB glass can reduce the sintering temperature of Li2Zn3Ti4O12 ceramics from 1,075 to 900 °C without much degradation of the microwave dielectric properties. Only a single-phase Li2Zn3Ti4O12 is formed in Li2Zn3Ti4O12 ceramic with LZB addition. Typically, the 1.5 wt% LZB glass-added Li2Zn3Ti4O12 ceramic sintered at 900 °C for 2 h can reach a high relative density of 97.5 % and exhibits good microwave dielectric properties, i.e., relative dielectric constant (ε
r
) = 19.1, quality factor (Q) = 7083.5 at 9 GHz, and temperature coefficient of resonant frequency (τ
f
) = − 48.9 ppm/°C. In addition, the ceramic could be co-fired well with an Ag electrode, which is made it as a promising dielectric ceramic for low temperature co-fired ceramics technology application.