Abstract
The crystallization kinetics and phase developments of PbO-BaO-SrO-Nb2O5-B2 O3-SiO2-based glass-ceramics was investigated. Lead strontium barium niobate, (Pb,Sr,Ba)Nb2O6, with a tetragonal tungsten-bronze structure formed as the major crystalline phase, which showed evidence of both surface and bulk crystallization. The results of the present study showed significant evidence of a change in crystallization mechanism between the as-heated surface and the interior of glass-ceramics. This effect could be attributed to a volatilization of PbO taken place readily on the surface region of sample during heating. The grain size of the bulk-nucleated (Pb,Sr,Ba)Nb2O6 crystals was substantially smaller than that of surface-nucleated crystals. This result facilitated meeting the capacitors as high energy density application due to the ultrafine grains (<60 nm) obtained. The dielectric constant increased from 27 for the as-quenched glass to 200 for a highly crystallized glass-ceramic, which was attributed to a significant volume fraction of (Pb, Sr, Ba)Nb2O6 phase.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 438-446 |
| Number of pages | 9 |
| Journal | Journal of Materials Research |
| Volume | 20 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 1 2005 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Cite this
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Crystallization kinetics and dielectric properties of nanocrystalline lead strontium barium niobates. / Cheng, Ching Tai; Lanagan, Michael T.; Lin, Jiang Tsair; Jones, Beth; Pan, Ming Jen.
In: Journal of Materials Research, Vol. 20, No. 2, 01.02.2005, p. 438-446.Research output: Contribution to journal › Article
TY - JOUR
T1 - Crystallization kinetics and dielectric properties of nanocrystalline lead strontium barium niobates
AU - Cheng, Ching Tai
AU - Lanagan, Michael T.
AU - Lin, Jiang Tsair
AU - Jones, Beth
AU - Pan, Ming Jen
PY - 2005/2/1
Y1 - 2005/2/1
N2 - The crystallization kinetics and phase developments of PbO-BaO-SrO-Nb2O5-B2 O3-SiO2-based glass-ceramics was investigated. Lead strontium barium niobate, (Pb,Sr,Ba)Nb2O6, with a tetragonal tungsten-bronze structure formed as the major crystalline phase, which showed evidence of both surface and bulk crystallization. The results of the present study showed significant evidence of a change in crystallization mechanism between the as-heated surface and the interior of glass-ceramics. This effect could be attributed to a volatilization of PbO taken place readily on the surface region of sample during heating. The grain size of the bulk-nucleated (Pb,Sr,Ba)Nb2O6 crystals was substantially smaller than that of surface-nucleated crystals. This result facilitated meeting the capacitors as high energy density application due to the ultrafine grains (<60 nm) obtained. The dielectric constant increased from 27 for the as-quenched glass to 200 for a highly crystallized glass-ceramic, which was attributed to a significant volume fraction of (Pb, Sr, Ba)Nb2O6 phase.
AB - The crystallization kinetics and phase developments of PbO-BaO-SrO-Nb2O5-B2 O3-SiO2-based glass-ceramics was investigated. Lead strontium barium niobate, (Pb,Sr,Ba)Nb2O6, with a tetragonal tungsten-bronze structure formed as the major crystalline phase, which showed evidence of both surface and bulk crystallization. The results of the present study showed significant evidence of a change in crystallization mechanism between the as-heated surface and the interior of glass-ceramics. This effect could be attributed to a volatilization of PbO taken place readily on the surface region of sample during heating. The grain size of the bulk-nucleated (Pb,Sr,Ba)Nb2O6 crystals was substantially smaller than that of surface-nucleated crystals. This result facilitated meeting the capacitors as high energy density application due to the ultrafine grains (<60 nm) obtained. The dielectric constant increased from 27 for the as-quenched glass to 200 for a highly crystallized glass-ceramic, which was attributed to a significant volume fraction of (Pb, Sr, Ba)Nb2O6 phase.
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U2 - 10.1557/JMR.2005.0054
DO - 10.1557/JMR.2005.0054
M3 - Article
AN - SCOPUS:28044456964
VL - 20
SP - 438
EP - 446
JO - Journal of Materials Research
JF - Journal of Materials Research
SN - 0884-2914
IS - 2
ER -