Influences of particle size of alumina filler in an LTCC system

Yong Jun Seo, Jin Hyun Jung, Yong Soo Cho, Jun Chul Kim, Nam Kee Kang

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

A low temperature co-fired ceramics system consisting of a typical calcium aluminoborosilicate glass and alumina filler was used to investigate the effects of four different sizes, 13 nm, 0.5, 3, and 39 μm, of a commercially available alumina filler on the resultant densification, crystallization, and dielectric properties. There was definitely a proper range of alumina particle size, which leads to desirable densification and enhanced dielectric properties. The onset temperatures of densification and crystallization depended strongly on the filler particle size. The 3 μm sample as an optimum filler size exhibited a promising performance of k ∼ 8.1 and Q ∼160 at a resonant frequency of 14.8 GHz, which results from early densification and intensive crystallization of the anorthite CaAl2Si2O8 phase. Particularly, the use of nano-sized alumina (13 nm) retarded both densification by ∼200°C and crystallization by ∼80°C compared with the results of the 3 μm alumina case. The dependence of the filler particle size was postulated as being related to the wetting and connectivity behavior of glass through consequent inter-reactions between glass and ceramic.

Original languageEnglish
Pages (from-to)649-652
Number of pages4
JournalJournal of the American Ceramic Society
Volume90
Issue number2
DOIs
Publication statusPublished - 2007 Feb 1

Fingerprint

Aluminum Oxide
Densification
aluminum oxide
Fillers
Crystallization
Alumina
Particle size
particle size
crystallization
dielectric property
glass
Glass
ceramics
Dielectric properties
anorthite
wetting
Wetting
connectivity
Calcium
Natural frequencies

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

Cite this

Seo, Yong Jun ; Jung, Jin Hyun ; Cho, Yong Soo ; Kim, Jun Chul ; Kang, Nam Kee. / Influences of particle size of alumina filler in an LTCC system. In: Journal of the American Ceramic Society. 2007 ; Vol. 90, No. 2. pp. 649-652.
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Influences of particle size of alumina filler in an LTCC system. / Seo, Yong Jun; Jung, Jin Hyun; Cho, Yong Soo; Kim, Jun Chul; Kang, Nam Kee.

In: Journal of the American Ceramic Society, Vol. 90, No. 2, 01.02.2007, p. 649-652.

Research output: Contribution to journalArticle

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