Low Temperature Sintering and Microwave Dielectric Properties of B2O3-added LiAlSiO4 Ceramics
- Authors
- Kweon, Sang-Hyo; Joung, Mi-Ri; Kim, Jin-Seong; Kim, Bo-Yun; Nahm, Sahn; Paik, Jong-Hoo; Kim, Young-Sik; Sung, Tae-Hyun
- Issue Date
- Jul-2011
- Publisher
- WILEY
- Citation
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.94, no.7, pp.1995 - 1998
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY
- Volume
- 94
- Number
- 7
- Start Page
- 1995
- End Page
- 1998
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/168043
- DOI
- 10.1111/j.1551-2916.2011.04619.x
- ISSN
- 0002-7820
- Abstract
- The sintering temperature of the LiAlSiO4(LAS) ceramics, which exhibited the microwave dielectric properties of epsilon(r) = 4.8, Q x f = 36 000GHz, and tau(f)=8.0 ppm/degrees C, decreased below 960 degrees C when B2O3 was added. The B2O3-related liquid phase was formed and assisted the densification of the LAS ceramics at low temperatures. The average grain size of the specimen sintered at 950 degrees C increased with the addition of B2O3 but decreased when B2O3 exceeded 12.0 mol%, probably due to the presence of a large amount of liquid phase. The LAS ceramics containing 12.0 mol% of B2O3 sintered at 950 degrees C exhibited the excellent microwave dielectric properties of epsilon(r) = 5.3, Qxf = 212 000GHz and tau(f) = -7.7 ppm/degrees C.
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