Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/20105
Title: Low temperature cofirable Ca[(Li 1/3Nb 2/3) 0.95Zr 0.15]O 3+δ microwave dielectric ceramic with ZnO-B 2O 3-SiO 2 frit
Authors: Hu, M
Xiong, J
Gu, H
Chen, Y
Wang, Y 
Keywords: Addition
Low temperature cofire sintering
Microwave dielectric properties
ZBS frit
Issue Date: 2012
Publisher: Pergamon Press
Source: Ceramics international, 2012, v. 38, no. 4, p. 3175-3183 How to cite?
Journal: Ceramics international 
Abstract: The sintering properties and microwave dielectric properties of Ca[(Li 1/3Nb 2/3) 1-xZr 3x]O 3+δ (x = 0.05, abbreviated as CLNZ) ceramic doped with ZBS frit are investigated for LTCC applications. XRD patterns and SEM photographs show that dense and single perovskite phase ceramics can be obtained with ZBS doping content of less than 10 wt%, before the Ca 2Nb 2O 7 pyrochlore phase begins to segregates. The results show that ZBS vitreous phase stays at the grain boundary in the final sintered ceramics, suggesting it acts as liquid phase lubrication during sintering, and has effectively lowered the sintering temperature of CLNZ ceramics from 1170 °C to 940 °C. The preferred orientation of CLNZ solid solution varies from (1 2 1) plane to (1 0 1) plane as ZBS content and sintering temperature increase. The optimal microwave dielectric properties of ε r = 32.0, Q f = 6.64 THz and τ f = -27.1 ppm/°C can be obtained in 15 wt% ZBS doped CLNZ ceramic when sintered at 940 °C for 4 h. The Ag-cofiring experiment clearly shows that no chemical reaction takes place between Ag and the ZBS-doped CLNZ ceramic, indicating its great potential applications in LTCC field.
URI: http://hdl.handle.net/10397/20105
ISSN: 0272-8842
EISSN: 1873-3956
DOI: 10.1016/j.ceramint.2011.12.021
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