Low-temperature sintering and microwave dielectric properties of Mg sub(3)B sub(2)O sub(6)-LMZBS composites

The Mg sub(3)B sub(2)O sub(6) ceramics with lithium magnesium zinc borosilicate (LMZBS) glass were prepared at a lower sintering temperature. The effects of the glass addition on the densification, phase development, microstructure and microwave dielectric properties of the Mg sub(3)B sub(2)O sub(6)...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2012-05, Vol.23 (5), p.981-989
Main Authors: Zhou, Dong-Xiang, Sun, Fei, Hu, Yun-Xiang, Fu, Qiu-Yun, Dou, Gang
Format: Article
Language:English
Subjects:
Ceramics
Dielectric properties
Glass
Magnesium
Microwaves
Phase transformations
Sintering
Zinc
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Summary:The Mg sub(3)B sub(2)O sub(6) ceramics with lithium magnesium zinc borosilicate (LMZBS) glass were prepared at a lower sintering temperature. The effects of the glass addition on the densification, phase development, microstructure and microwave dielectric properties of the Mg sub(3)B sub(2)O sub(6) ceramics were investigated. The addition of LMZBS glass improved the densification and lowered the sintering temperature of Mg sub(3)B sub(2)O sub(6) ceramics from 1,300 to 950 degree C. X-ray diffraction patterns showed that Mg sub(3)B sub(2)O sub(6) transformed into Mg sub(2)B sub(2)O sub(5) and a new phase, Li sub(2)ZnSiO sub(4), crystallized from the glass phase. Because of the high dielectric performance of these phases, Mg sub(3)B sub(2)O sub(6) mixed with 55 wt% LMZBS sintered at 950 degree C for 3 h had epsilon sub(r) = 6.8, Q f = 50,000 GHz, and tau sub(f) = -64 ppm/ degree C at 7.28 GHz. The chemical compatibility of ceramic-glass composites with Ag was also investigated for LTCC.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-011-0532-5