Co-firing of spatially varying dielectric Ca-Mg-silicate and Bi-Ba-Nd-titanate composite

Young-Hag Koh, Angela Knapp, John W. Halloran, Hae Won Kim, Hyoun Ee Kim

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A spatially variant dielectric Ca-Mg-silicate (CMS)/Bi-Ba-Nd-titania (BBNT) composite, in which periodic BBNT inclusions were embedded in the CMS matrix, was fabricated using the thermoplastic extrusion. The co-firing behavior of the composite was evaluated in terms of its shrinkage compatibility, thermoplastic compatibility, and chemical compatibility. The noticeable shrinkage mismatch between CMS and BBNT materials was observed. Such shrinkage mismatch strongly affected the interfacial bonding types of the composites. The good interfacial bonding was observed for the composite having BBNT inclusions in the CMS matrix; however, the interfacial cracking and matrix cracking for the opposite design (i.e., CMS inclusions in the BBNT matrix). In addition, the (Ca, Zn)-rich glassy phase in the CMS region migrated into the BBNT region, forming an interfacial reaction layer. The dielectric properties of the CMS, BBNT, and CMS-BBNT mixture were measured to evaluate the spatially variant dielectric CMS/BBNT composite as a novel dielectric substrate.

Original languageEnglish
Pages (from-to)2690-2695
Number of pages6
JournalJournal of the American Ceramic Society
Volume88
Issue number10
DOIs
Publication statusPublished - 2005 Oct 1
Externally publishedYes

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titanate
Silicates
titanium
silicate
Titanium
Composite materials
matrix
Thermoplastics
firing
titanium dioxide
dielectric property
Surface chemistry
extrusion
Dielectric properties
Extrusion
substrate

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Co-firing of spatially varying dielectric Ca-Mg-silicate and Bi-Ba-Nd-titanate composite. / Koh, Young-Hag; Knapp, Angela; Halloran, John W.; Kim, Hae Won; Kim, Hyoun Ee.

In: Journal of the American Ceramic Society, Vol. 88, No. 10, 01.10.2005, p. 2690-2695.

Research output: Contribution to journalArticle

Koh, Young-Hag ; Knapp, Angela ; Halloran, John W. ; Kim, Hae Won ; Kim, Hyoun Ee. / Co-firing of spatially varying dielectric Ca-Mg-silicate and Bi-Ba-Nd-titanate composite. In: Journal of the American Ceramic Society. 2005 ; Vol. 88, No. 10. pp. 2690-2695.
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