Influence of SiO2 addition on the dielectric properties and microstructure of (Ba0.96Ca0.04)(Ti0.85 Zr0.15)O3 ceramics

Ying Chieh Lee, Chia Wei Lin, Wei Hua Lu, Wen Jauh Chen, Wen-Shi Lee

Research output: Contribution to journalArticle

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Abstract

In this study, the effect of SiO2 doping on the sintering behavior, microstructure, and dielectric properties of BaTiO3 -based ceramics was investigated. Silica was added to (Ba0.96 Ca0.04)(Ti0.85Zr0.15)O3 (BCTZ) powder prepared using the solid-state method. SiO2 -doped BCTZ ceramics with a high density and a uniform grain size were obtained and sintered at 1220°C in a reducing atmosphere. A second phase (BaTiSiO5) existed in samples when SiO2 was added in excess of 1%. The amount of the second phases was observed to increase as the number of SiO2 additives increased. It was found that BCTZ ceramics sintered with SiO2 are helpful in reducing the sintering temperature for a typical thick film and MLCC applications. However, there were disadvantageous effects on the dielectric properties with mere addition of SiO2 addition (3% and 5%) due to higher formation of BaTiSiO5. Doping with a small amount of silica can improve the sintering and dielectric properties of BCTZ ceramics. In addition, to understand the effect of the BaTiSiO5 phase on the dielectric properties of BCTZ ceramics, the BaTiSiO5 composition was synthesized from individual BaCO3, TiO2, and SiO2 powders using conventional solid-state methods. X-ray diffraction results show the presence of mainly the crystalline phase, BaTiSiO5, in the sintered ceramics.

Original languageEnglish
Pages (from-to)692-701
Number of pages10
JournalInternational Journal of Applied Ceramic Technology
Volume6
Issue number6
DOIs
Publication statusPublished - 2009 Nov 17

Fingerprint

Dielectric properties
dielectric properties
ceramics
microstructure
Microstructure
Sintering
Silicon Dioxide
Powders
sintering
Silica
Doping (additives)
Thick films
silicon dioxide
solid state
Crystalline materials
X ray diffraction
thick films
grain size
Chemical analysis
atmospheres

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Marketing
  • Materials Chemistry

Cite this

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title = "Influence of SiO2 addition on the dielectric properties and microstructure of (Ba0.96Ca0.04)(Ti0.85 Zr0.15)O3 ceramics",
abstract = "In this study, the effect of SiO2 doping on the sintering behavior, microstructure, and dielectric properties of BaTiO3 -based ceramics was investigated. Silica was added to (Ba0.96 Ca0.04)(Ti0.85Zr0.15)O3 (BCTZ) powder prepared using the solid-state method. SiO2 -doped BCTZ ceramics with a high density and a uniform grain size were obtained and sintered at 1220°C in a reducing atmosphere. A second phase (BaTiSiO5) existed in samples when SiO2 was added in excess of 1{\%}. The amount of the second phases was observed to increase as the number of SiO2 additives increased. It was found that BCTZ ceramics sintered with SiO2 are helpful in reducing the sintering temperature for a typical thick film and MLCC applications. However, there were disadvantageous effects on the dielectric properties with mere addition of SiO2 addition (3{\%} and 5{\%}) due to higher formation of BaTiSiO5. Doping with a small amount of silica can improve the sintering and dielectric properties of BCTZ ceramics. In addition, to understand the effect of the BaTiSiO5 phase on the dielectric properties of BCTZ ceramics, the BaTiSiO5 composition was synthesized from individual BaCO3, TiO2, and SiO2 powders using conventional solid-state methods. X-ray diffraction results show the presence of mainly the crystalline phase, BaTiSiO5, in the sintered ceramics.",
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Influence of SiO2 addition on the dielectric properties and microstructure of (Ba0.96Ca0.04)(Ti0.85 Zr0.15)O3 ceramics. / Lee, Ying Chieh; Lin, Chia Wei; Lu, Wei Hua; Chen, Wen Jauh; Lee, Wen-Shi.

In: International Journal of Applied Ceramic Technology, Vol. 6, No. 6, 17.11.2009, p. 692-701.

Research output: Contribution to journalArticle

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T1 - Influence of SiO2 addition on the dielectric properties and microstructure of (Ba0.96Ca0.04)(Ti0.85 Zr0.15)O3 ceramics

AU - Lee, Ying Chieh

AU - Lin, Chia Wei

AU - Lu, Wei Hua

AU - Chen, Wen Jauh

AU - Lee, Wen-Shi

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