Microstructure and microwave dielectric properties of Bi 12SiO 20 ceramics

Byoung Jik Jeong, Mi Ri Joung, Sang Hyo Kweon, Jin Seong Kim, Sahn Nahm, Ji Won Choi, Seong Ju Hwang

Research output: Contribution to journalArticle

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Abstract

Bi 12SiO 20 ceramics were well sintered at 800°C after calcination at 700°C. A liquid phase of composition Bi 2O 3 was formed during the sintering at temperatures ≥800°C and assisted the densification of the Bi 12SiO 20 ceramics. When the sintering temperature exceeded 800°C, however, the relative density, ε r, and Q × f values of the Bi 12SiO 20 ceramics decreased, probably due to the formation of a large amount of the liquid phase. The Bi 12SiO 20 ceramics sintered at 800°C for 5.0 h exhibited excellent microwave dielectric properties with a high ε r of 43, a high Q × f of 86,802 GHz and a small τ f of -10.39 ppm/°C.

Original languageEnglish
Pages (from-to)4510-4513
Number of pages4
JournalMaterials Research Bulletin
Volume47
Issue number12
DOIs
Publication statusPublished - 2012 Dec 1

Fingerprint

Dielectric properties
dielectric properties
Sintering
Microwaves
ceramics
microwaves
microstructure
Microstructure
Liquids
Densification
Calcination
sintering
liquid phases
Temperature
densification
Chemical analysis
roasting
Q factors
temperature

Keywords

  • A. Ceramics
  • A. Oxides
  • D. Dielectric properties
  • D. Microstructure

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Jeong, B. J., Joung, M. R., Kweon, S. H., Kim, J. S., Nahm, S., Choi, J. W., & Hwang, S. J. (2012). Microstructure and microwave dielectric properties of Bi 12SiO 20 ceramics. Materials Research Bulletin, 47(12), 4510-4513. https://doi.org/10.1016/j.materresbull.2012.08.075

Microstructure and microwave dielectric properties of Bi 12SiO 20 ceramics. / Jeong, Byoung Jik; Joung, Mi Ri; Kweon, Sang Hyo; Kim, Jin Seong; Nahm, Sahn; Choi, Ji Won; Hwang, Seong Ju.

In: Materials Research Bulletin, Vol. 47, No. 12, 01.12.2012, p. 4510-4513.

Research output: Contribution to journalArticle

Jeong, BJ, Joung, MR, Kweon, SH, Kim, JS, Nahm, S, Choi, JW & Hwang, SJ 2012, 'Microstructure and microwave dielectric properties of Bi 12SiO 20 ceramics', Materials Research Bulletin, vol. 47, no. 12, pp. 4510-4513. https://doi.org/10.1016/j.materresbull.2012.08.075
Jeong, Byoung Jik ; Joung, Mi Ri ; Kweon, Sang Hyo ; Kim, Jin Seong ; Nahm, Sahn ; Choi, Ji Won ; Hwang, Seong Ju. / Microstructure and microwave dielectric properties of Bi 12SiO 20 ceramics. In: Materials Research Bulletin. 2012 ; Vol. 47, No. 12. pp. 4510-4513.
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