Abstract
The epoxy/matrix composites incorporating with dispersed and agglomerated nano-BaTiO3 fillers were investigated. The relative dielectric constants of the composites with the agglomerated particles were significantly improved, compared to those of the composites with the well-dispersed particles. In addition, the experimental data were in better agreement with the values calculated by the Lichteneker's model than with those of the conventional Maxwell-Garnett's model which has been widely employed for the calculation of the dielectric constant of polymer/filler composites. In order to promote an agglomeration by interlocking between the nanoparticles, the BaTiO3 powders were heat-treated at various temperatures. An epoxy composite with 40 vol% BaTiO3 heat-treated at 800°C for 1 h exhibited an excellent relative dielectric constant of 67, along with high polarizability, low dielectric loss, and low leakage current. Similarly, the epoxy composites with agglomerated SrTiO3 fillers provided a higher dielectric constant than that of their dispersed counterparts. The origin of the increase in the relative dielectric constant achieved by the agglomeration effect is also suggested.
| Original language | English |
|---|---|
| Pages (from-to) | 62-65 |
| Number of pages | 4 |
| Journal | Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan |
| Volume | 118 |
| Issue number | 1373 |
| Publication status | Published - 2010 Jan 1 |
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Keywords
- Agglomeration effect
- Ceramic-polymer composites
- Dielectric constant
- Mixing model
- Parallel arrangement
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry
- Chemistry(all)
- Condensed Matter Physics
Cite this
Enhanced dielectric constant of polymer-matrix compositesusing nano-BaTiO3 agglomerates. / Lee, Dong Ho; Lee, Jong Heun; Kim, Dong-Wan; Kim, Byung Kook; Je, Hae June.
In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 118, No. 1373, 01.01.2010, p. 62-65.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Enhanced dielectric constant of polymer-matrix compositesusing nano-BaTiO3 agglomerates
AU - Lee, Dong Ho
AU - Lee, Jong Heun
AU - Kim, Dong-Wan
AU - Kim, Byung Kook
AU - Je, Hae June
PY - 2010/1/1
Y1 - 2010/1/1
N2 - The epoxy/matrix composites incorporating with dispersed and agglomerated nano-BaTiO3 fillers were investigated. The relative dielectric constants of the composites with the agglomerated particles were significantly improved, compared to those of the composites with the well-dispersed particles. In addition, the experimental data were in better agreement with the values calculated by the Lichteneker's model than with those of the conventional Maxwell-Garnett's model which has been widely employed for the calculation of the dielectric constant of polymer/filler composites. In order to promote an agglomeration by interlocking between the nanoparticles, the BaTiO3 powders were heat-treated at various temperatures. An epoxy composite with 40 vol% BaTiO3 heat-treated at 800°C for 1 h exhibited an excellent relative dielectric constant of 67, along with high polarizability, low dielectric loss, and low leakage current. Similarly, the epoxy composites with agglomerated SrTiO3 fillers provided a higher dielectric constant than that of their dispersed counterparts. The origin of the increase in the relative dielectric constant achieved by the agglomeration effect is also suggested.
AB - The epoxy/matrix composites incorporating with dispersed and agglomerated nano-BaTiO3 fillers were investigated. The relative dielectric constants of the composites with the agglomerated particles were significantly improved, compared to those of the composites with the well-dispersed particles. In addition, the experimental data were in better agreement with the values calculated by the Lichteneker's model than with those of the conventional Maxwell-Garnett's model which has been widely employed for the calculation of the dielectric constant of polymer/filler composites. In order to promote an agglomeration by interlocking between the nanoparticles, the BaTiO3 powders were heat-treated at various temperatures. An epoxy composite with 40 vol% BaTiO3 heat-treated at 800°C for 1 h exhibited an excellent relative dielectric constant of 67, along with high polarizability, low dielectric loss, and low leakage current. Similarly, the epoxy composites with agglomerated SrTiO3 fillers provided a higher dielectric constant than that of their dispersed counterparts. The origin of the increase in the relative dielectric constant achieved by the agglomeration effect is also suggested.
KW - Agglomeration effect
KW - Ceramic-polymer composites
KW - Dielectric constant
KW - Mixing model
KW - Parallel arrangement
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UR - http://www.scopus.com/inward/citedby.url?scp=75749120588&partnerID=8YFLogxK
M3 - Article
VL - 118
SP - 62
EP - 65
JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
SN - 1882-0743
IS - 1373
ER -