Phase formation kinetics in sol-gel derived strontium bismith tantalate

Yun Mo Sung; Woo Chul Kwack

doi:10.1557/proc-666-f7.4

Phase formation kinetics in sol-gel derived strontium bismith tantalate

Research output: Contribution to journal › Conference article › peer-review

Abstract

Phase formation characteristics of Sr_0.7Bi_2.4Ta₂O₉ (SBT) powder, synthesized via sol-gel and pyrolysis process, was investigated by using thermal analysis. Each of the two exotherms, appearing in differential thermal analysis (DTA) scan curves, was identified as crystallization of fluorite phase and transformation of fluorite to aurivillius phase, respectively by using x-ray diffraction (XRD). By applying non-isothermal kinetic analyses to the DTA results, activation energy values for the formation of fluorite and aurivillius phases were determined as 192 and 375 kJ/mol, respectively and Avrami exponent values for each reaction were determined as 0.91 and 0.96, respectively. These activation energy and Avrami exponent values were discussed in detail to understand phase formation mechanism in SBT system.

Original language	English
Pages (from-to)	F741-F746
Journal	Materials Research Society Symposium - Proceedings
Volume	666
DOIs	https://doi.org/10.1557/proc-666-f7.4
Publication status	Published - 2001
Externally published	Yes
Event	Transport and Microstructural Phenomena in Oxide Electronics - San Francisco, CA, United States Duration: 2001 Apr 16 → 2001 Apr 20

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Phase formation kinetics in sol-gel derived strontium bismith tantalate",

abstract = "Phase formation characteristics of Sr0.7Bi2.4Ta2O9 (SBT) powder, synthesized via sol-gel and pyrolysis process, was investigated by using thermal analysis. Each of the two exotherms, appearing in differential thermal analysis (DTA) scan curves, was identified as crystallization of fluorite phase and transformation of fluorite to aurivillius phase, respectively by using x-ray diffraction (XRD). By applying non-isothermal kinetic analyses to the DTA results, activation energy values for the formation of fluorite and aurivillius phases were determined as 192 and 375 kJ/mol, respectively and Avrami exponent values for each reaction were determined as 0.91 and 0.96, respectively. These activation energy and Avrami exponent values were discussed in detail to understand phase formation mechanism in SBT system.",

author = "Sung, {Yun Mo} and Kwack, {Woo Chul}",

year = "2001",

doi = "10.1557/proc-666-f7.4",

language = "English",

volume = "666",

pages = "F741--F746",

journal = "Materials Research Society Symposium Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

note = "Transport and Microstructural Phenomena in Oxide Electronics ; Conference date: 16-04-2001 Through 20-04-2001",

}

TY - JOUR

T1 - Phase formation kinetics in sol-gel derived strontium bismith tantalate

AU - Sung, Yun Mo

AU - Kwack, Woo Chul

PY - 2001

Y1 - 2001

N2 - Phase formation characteristics of Sr0.7Bi2.4Ta2O9 (SBT) powder, synthesized via sol-gel and pyrolysis process, was investigated by using thermal analysis. Each of the two exotherms, appearing in differential thermal analysis (DTA) scan curves, was identified as crystallization of fluorite phase and transformation of fluorite to aurivillius phase, respectively by using x-ray diffraction (XRD). By applying non-isothermal kinetic analyses to the DTA results, activation energy values for the formation of fluorite and aurivillius phases were determined as 192 and 375 kJ/mol, respectively and Avrami exponent values for each reaction were determined as 0.91 and 0.96, respectively. These activation energy and Avrami exponent values were discussed in detail to understand phase formation mechanism in SBT system.

AB - Phase formation characteristics of Sr0.7Bi2.4Ta2O9 (SBT) powder, synthesized via sol-gel and pyrolysis process, was investigated by using thermal analysis. Each of the two exotherms, appearing in differential thermal analysis (DTA) scan curves, was identified as crystallization of fluorite phase and transformation of fluorite to aurivillius phase, respectively by using x-ray diffraction (XRD). By applying non-isothermal kinetic analyses to the DTA results, activation energy values for the formation of fluorite and aurivillius phases were determined as 192 and 375 kJ/mol, respectively and Avrami exponent values for each reaction were determined as 0.91 and 0.96, respectively. These activation energy and Avrami exponent values were discussed in detail to understand phase formation mechanism in SBT system.

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U2 - 10.1557/proc-666-f7.4

DO - 10.1557/proc-666-f7.4

M3 - Conference article

AN - SCOPUS:0035557351

SN - 0272-9172

VL - 666

SP - F741-F746

JO - Materials Research Society Symposium Proceedings

JF - Materials Research Society Symposium Proceedings

T2 - Transport and Microstructural Phenomena in Oxide Electronics

Y2 - 16 April 2001 through 20 April 2001

ER -

Phase formation kinetics in sol-gel derived strontium bismith tantalate

Abstract

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