Fabrication and electrical properties of textured Sr0.53Ba0.47Nb2O6 ceramics by templated grain growth

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Abstract

Textured Sr0.53Ba0.47Nb2O6 ceramics with a relative density of >95% were fabricated using templated grain growth (TGG). Acicular KSr2Nb5O15 template particles synthesized via a molten salt process were aligned by tape casting in a mixture of solid-state-synthesized SrNb2O6 and BaNb2O6 powders. The resulting ceramics possessed strong fiber texture along the polar axis ([001]) of the strontium barium niobate. Samples with 15.4 wt% templates attained a textured fraction of 0.82 after sintering at a temperature of 1450 °C for 4 h. These materials showed peak dielectric constants of 7550 at 1 kHz, remanent polarizations of 13.2 μC/cm2, saturation polarizations of 21 μC/cm2 (60%-85% of the single-crystal value), piezoelectric strain coefficients of 78 pC/N (70%-85% of the single-crystal value), and room-temperature pyroelectric coefficients of 2.9×10-2 μC·(cm2·°C)-1 (52% of the single-crystal value). These results show that TGG is a viable option for accessing single-crystal properties in polycrystalline ceramics.

Original languageEnglish (US)
Pages (from-to)2203-2213
Number of pages11
JournalJournal of the American Ceramic Society
Volume83
Issue number9
StatePublished - Sep 1 2000

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electrical property
Grain growth
ceramics
Electric properties
Single crystals
crystal
Fabrication
crystal property
polarization
barium
strontium
Strontium
Remanence
Barium
texture
temperature
saturation
Powders
Tapes
salt

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

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title = "Fabrication and electrical properties of textured Sr0.53Ba0.47Nb2O6 ceramics by templated grain growth",
abstract = "Textured Sr0.53Ba0.47Nb2O6 ceramics with a relative density of >95{\%} were fabricated using templated grain growth (TGG). Acicular KSr2Nb5O15 template particles synthesized via a molten salt process were aligned by tape casting in a mixture of solid-state-synthesized SrNb2O6 and BaNb2O6 powders. The resulting ceramics possessed strong fiber texture along the polar axis ([001]) of the strontium barium niobate. Samples with 15.4 wt{\%} templates attained a textured fraction of 0.82 after sintering at a temperature of 1450 °C for 4 h. These materials showed peak dielectric constants of 7550 at 1 kHz, remanent polarizations of 13.2 μC/cm2, saturation polarizations of 21 μC/cm2 (60{\%}-85{\%} of the single-crystal value), piezoelectric strain coefficients of 78 pC/N (70{\%}-85{\%} of the single-crystal value), and room-temperature pyroelectric coefficients of 2.9×10-2 μC·(cm2·°C)-1 (52{\%} of the single-crystal value). These results show that TGG is a viable option for accessing single-crystal properties in polycrystalline ceramics.",
author = "Cihangir Duran and Trolier-McKinstry, {Susan E.} and Messing, {Gary Lynn}",
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T1 - Fabrication and electrical properties of textured Sr0.53Ba0.47Nb2O6 ceramics by templated grain growth

AU - Duran, Cihangir

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AU - Messing, Gary Lynn

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N2 - Textured Sr0.53Ba0.47Nb2O6 ceramics with a relative density of >95% were fabricated using templated grain growth (TGG). Acicular KSr2Nb5O15 template particles synthesized via a molten salt process were aligned by tape casting in a mixture of solid-state-synthesized SrNb2O6 and BaNb2O6 powders. The resulting ceramics possessed strong fiber texture along the polar axis ([001]) of the strontium barium niobate. Samples with 15.4 wt% templates attained a textured fraction of 0.82 after sintering at a temperature of 1450 °C for 4 h. These materials showed peak dielectric constants of 7550 at 1 kHz, remanent polarizations of 13.2 μC/cm2, saturation polarizations of 21 μC/cm2 (60%-85% of the single-crystal value), piezoelectric strain coefficients of 78 pC/N (70%-85% of the single-crystal value), and room-temperature pyroelectric coefficients of 2.9×10-2 μC·(cm2·°C)-1 (52% of the single-crystal value). These results show that TGG is a viable option for accessing single-crystal properties in polycrystalline ceramics.

AB - Textured Sr0.53Ba0.47Nb2O6 ceramics with a relative density of >95% were fabricated using templated grain growth (TGG). Acicular KSr2Nb5O15 template particles synthesized via a molten salt process were aligned by tape casting in a mixture of solid-state-synthesized SrNb2O6 and BaNb2O6 powders. The resulting ceramics possessed strong fiber texture along the polar axis ([001]) of the strontium barium niobate. Samples with 15.4 wt% templates attained a textured fraction of 0.82 after sintering at a temperature of 1450 °C for 4 h. These materials showed peak dielectric constants of 7550 at 1 kHz, remanent polarizations of 13.2 μC/cm2, saturation polarizations of 21 μC/cm2 (60%-85% of the single-crystal value), piezoelectric strain coefficients of 78 pC/N (70%-85% of the single-crystal value), and room-temperature pyroelectric coefficients of 2.9×10-2 μC·(cm2·°C)-1 (52% of the single-crystal value). These results show that TGG is a viable option for accessing single-crystal properties in polycrystalline ceramics.

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