Abstract
Porous lead zirconate titanate-lead zinc niobate (PZT-PZN) piezoelectric ceramics with interconnected pore channels were fabricated using the camphene-based freeze-casting method. In this method, warm PZT-PZN/camphene slurries with various solid loadings (10, 15, 20, and 25 vol%) were prepared by ball milling at 60°C and then cast into molds at 20°C, resulting in the formation of solidified green bodies comprised of three-dimensionally interconnected camphene dendrite networks and concentrated ceramic particle walls. After the removal of the frozen camphene via sublimation, the samples were sintered at 1200°C for 2 h. All of the fabricated samples showed highly porous structures, consisting of fully dense PZT-PZN walls without defects, such as cracks or pores. As the initial solid loading was decreased from 25 to 10 vol%, the porosity was linearly increased from 50% to 82%. This increase in the porosity led to a reduction in the permittivity, a moderate decline in the d33 value, and a rapid decline in the d31 value, which endowed the porous samples with a high hydrostatic figure of merit (HFOM). The highest HFOM value of 35650 × 10-15 Pa-1 was achieved for the sample with a porosity of 82%, as well as ε33= 284, dh=298 pC/N, and gh=118 × 10-3 V·(m·Pa)-1.
| Original language | English |
|---|---|
| Pages (from-to) | 2807-2813 |
| Number of pages | 7 |
| Journal | Journal of the American Ceramic Society |
| Volume | 90 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2007 Sep 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Ceramics and Composites
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Fabrication of porous PZT-PZN piezoelectric ceramics with high hydrostatic figure of merits using camphene-based freeze casting. / Lee, Seung H.; Jun, Shin H.; Kim, Hyoun E.; Koh, Young-Hag.
In: Journal of the American Ceramic Society, Vol. 90, No. 9, 01.09.2007, p. 2807-2813.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Fabrication of porous PZT-PZN piezoelectric ceramics with high hydrostatic figure of merits using camphene-based freeze casting
AU - Lee, Seung H.
AU - Jun, Shin H.
AU - Kim, Hyoun E.
AU - Koh, Young-Hag
PY - 2007/9/1
Y1 - 2007/9/1
N2 - Porous lead zirconate titanate-lead zinc niobate (PZT-PZN) piezoelectric ceramics with interconnected pore channels were fabricated using the camphene-based freeze-casting method. In this method, warm PZT-PZN/camphene slurries with various solid loadings (10, 15, 20, and 25 vol%) were prepared by ball milling at 60°C and then cast into molds at 20°C, resulting in the formation of solidified green bodies comprised of three-dimensionally interconnected camphene dendrite networks and concentrated ceramic particle walls. After the removal of the frozen camphene via sublimation, the samples were sintered at 1200°C for 2 h. All of the fabricated samples showed highly porous structures, consisting of fully dense PZT-PZN walls without defects, such as cracks or pores. As the initial solid loading was decreased from 25 to 10 vol%, the porosity was linearly increased from 50% to 82%. This increase in the porosity led to a reduction in the permittivity, a moderate decline in the d33 value, and a rapid decline in the d31 value, which endowed the porous samples with a high hydrostatic figure of merit (HFOM). The highest HFOM value of 35650 × 10-15 Pa-1 was achieved for the sample with a porosity of 82%, as well as ε33= 284, dh=298 pC/N, and gh=118 × 10-3 V·(m·Pa)-1.
AB - Porous lead zirconate titanate-lead zinc niobate (PZT-PZN) piezoelectric ceramics with interconnected pore channels were fabricated using the camphene-based freeze-casting method. In this method, warm PZT-PZN/camphene slurries with various solid loadings (10, 15, 20, and 25 vol%) were prepared by ball milling at 60°C and then cast into molds at 20°C, resulting in the formation of solidified green bodies comprised of three-dimensionally interconnected camphene dendrite networks and concentrated ceramic particle walls. After the removal of the frozen camphene via sublimation, the samples were sintered at 1200°C for 2 h. All of the fabricated samples showed highly porous structures, consisting of fully dense PZT-PZN walls without defects, such as cracks or pores. As the initial solid loading was decreased from 25 to 10 vol%, the porosity was linearly increased from 50% to 82%. This increase in the porosity led to a reduction in the permittivity, a moderate decline in the d33 value, and a rapid decline in the d31 value, which endowed the porous samples with a high hydrostatic figure of merit (HFOM). The highest HFOM value of 35650 × 10-15 Pa-1 was achieved for the sample with a porosity of 82%, as well as ε33= 284, dh=298 pC/N, and gh=118 × 10-3 V·(m·Pa)-1.
UR - http://www.scopus.com/inward/record.url?scp=34548500353&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34548500353&partnerID=8YFLogxK
U2 - 10.1111/j.1551-2916.2007.01834.x
DO - 10.1111/j.1551-2916.2007.01834.x
M3 - Article
VL - 90
SP - 2807
EP - 2813
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 9
ER -