Abstract
The variations of physical and dielectric properties of low temperature dielectrics based on typical aluminoborosilicate glasses modified with several divalent oxides were investigated. The divalent oxides studied here included CaO, MgO, BaO, SrO and ZnO. All samples containing either 35 wt% or 45 wt% alumina filler were prepared at the same processing condition and then fired at 850°C for 30 min. The resultant characteristics of fired samples depended on the choice of the divalent ion and the content of the alumina filler. Except for the ZnO modification, all other samples containing 35 wt% filler demonstrated promising densification as they exhibited reasonably high densities of 3.07-3.31 g/cm3 and high shrinkages of 14.0-16.4%. Particularly, the sample containing ZnO was distinguished with large variations compared to the base sample, which can be highlighted with earlier densification and crystallization at unexpectedly low temperatures. The negative effects of the ZnO modification on densification and dielectric properties were thought to be associated with earlier crystallization potentially by influencing effective densification via viscous flow. As an optimum composition, the sample containing only CaO showed the most promising characteristics such as k∼8.05 and tanδ∼ 0.0018 when 35 wt% alumina filler was used.
| Original language | English |
|---|---|
| Pages (from-to) | 613-617 |
| Number of pages | 5 |
| Journal | Journal of the Korean Ceramic Society |
| Volume | 44 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2007 Nov 30 |
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All Science Journal Classification (ASJC) codes
- Ceramics and Composites
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Physical and dielectric properties of aluminoborosilicate-based dielectrics containing different divalent oxides. / Shin, Dong Wook; Saji, Viswanathan S.; Gupta, Ravindra K.; Cho, Yong Soo.
In: Journal of the Korean Ceramic Society, Vol. 44, No. 11, 30.11.2007, p. 613-617.Research output: Contribution to journal › Article
TY - JOUR
T1 - Physical and dielectric properties of aluminoborosilicate-based dielectrics containing different divalent oxides
AU - Shin, Dong Wook
AU - Saji, Viswanathan S.
AU - Gupta, Ravindra K.
AU - Cho, Yong Soo
PY - 2007/11/30
Y1 - 2007/11/30
N2 - The variations of physical and dielectric properties of low temperature dielectrics based on typical aluminoborosilicate glasses modified with several divalent oxides were investigated. The divalent oxides studied here included CaO, MgO, BaO, SrO and ZnO. All samples containing either 35 wt% or 45 wt% alumina filler were prepared at the same processing condition and then fired at 850°C for 30 min. The resultant characteristics of fired samples depended on the choice of the divalent ion and the content of the alumina filler. Except for the ZnO modification, all other samples containing 35 wt% filler demonstrated promising densification as they exhibited reasonably high densities of 3.07-3.31 g/cm3 and high shrinkages of 14.0-16.4%. Particularly, the sample containing ZnO was distinguished with large variations compared to the base sample, which can be highlighted with earlier densification and crystallization at unexpectedly low temperatures. The negative effects of the ZnO modification on densification and dielectric properties were thought to be associated with earlier crystallization potentially by influencing effective densification via viscous flow. As an optimum composition, the sample containing only CaO showed the most promising characteristics such as k∼8.05 and tanδ∼ 0.0018 when 35 wt% alumina filler was used.
AB - The variations of physical and dielectric properties of low temperature dielectrics based on typical aluminoborosilicate glasses modified with several divalent oxides were investigated. The divalent oxides studied here included CaO, MgO, BaO, SrO and ZnO. All samples containing either 35 wt% or 45 wt% alumina filler were prepared at the same processing condition and then fired at 850°C for 30 min. The resultant characteristics of fired samples depended on the choice of the divalent ion and the content of the alumina filler. Except for the ZnO modification, all other samples containing 35 wt% filler demonstrated promising densification as they exhibited reasonably high densities of 3.07-3.31 g/cm3 and high shrinkages of 14.0-16.4%. Particularly, the sample containing ZnO was distinguished with large variations compared to the base sample, which can be highlighted with earlier densification and crystallization at unexpectedly low temperatures. The negative effects of the ZnO modification on densification and dielectric properties were thought to be associated with earlier crystallization potentially by influencing effective densification via viscous flow. As an optimum composition, the sample containing only CaO showed the most promising characteristics such as k∼8.05 and tanδ∼ 0.0018 when 35 wt% alumina filler was used.
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UR - http://www.scopus.com/inward/citedby.url?scp=41049102043&partnerID=8YFLogxK
U2 - 10.4191/KCERS.2007.44.1.613
DO - 10.4191/KCERS.2007.44.1.613
M3 - Article
AN - SCOPUS:41049102043
VL - 44
SP - 613
EP - 617
JO - Journal of the Korean Ceramic Society
JF - Journal of the Korean Ceramic Society
SN - 1229-7801
IS - 11
ER -