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Sintering Mechanism and Microwave Dielectric Properties of Bi12TiO20 Ceramics

Authors
Jeong, Byoung-JikJoung, Mi-RiKim, Jin-SeongNahm, SahnChoi, Ji-WonHwang, Seong-Ju
Issue Date
12월-2013
Publisher
WILEY-BLACKWELL
Citation
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.96, no.12, pp.3742 - 3746
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume
96
Number
12
Start Page
3742
End Page
3746
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/101472
DOI
10.1111/jace.12549
ISSN
0002-7820
Abstract
A homogeneous Bi12TiO20 phase was developed in a specimen that was calcined at 700 degrees C without the formation of a secondary phase. A small amount of the Bi12TiO20 phase melted during sintering and assisted the densification of the specimen. The Bi2O3 and Bi8TiO14 secondary phases were found in all specimens. All the specimens that were sintered at temperatures 775 degrees C exhibited high relative densities above 98% of the theoretical density. The Qxf value of the Bi12TiO20 ceramics was influenced by the grain size. The Bi12TiO20 ceramics sintered at 800 degrees C for 5h showed promising microwave dielectric properties of epsilon(r)=41, Qxf=10400GHz, and (f)=-10.8ppm/degrees C.
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