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Materials Science-Poland

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IMPACT FACTOR 2016: 0.610

CiteScore 2016: 0.64

SCImago Journal Rank (SJR) 2015: 0.226
Source Normalized Impact per Paper (SNIP) 2015: 0.431

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2083-134X
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Grain growth kinetics for B2O3-doped ZnO ceramics

Berat Yuksel
  • Istanbul University, Engineering Faculty, Metallurgical and Materials Engineering Department, Avcilar, 34320, Istanbul, Turkey
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/ T. Osman Ozkan
  • Istanbul University, Engineering Faculty, Metallurgical and Materials Engineering Department, Avcilar, 34320, Istanbul, Turkey
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Published Online: 2015-07-11 | DOI: https://doi.org/10.1515/msp-2015-0029

Abstract

Grain growth kinetics in 0.1 to 2 mol % B2O3-added ZnO ceramics was studied by using a simplified phenomenological grain growth kinetics equation Gn = K0 · t · exp(-Q/RT) together with the physical properties of sintered samples. The samples, prepared by conventional ceramics processing techniques, were sintered at temperatures between 1050 to 1250 °C for 1, 2, 3, 5 and 10 hours in air. The kinetic grain growth exponent value (n) and the activation energy for the grain growth of the 0.1 mol % B2O3-doped ZnO ceramics were found to be 2.8 and 332 kJ/mol, respectively. By increasing B2O3 content to 1 mol %, the grain growth exponent value (n) and the activation energy decreased to 2 and 238 kJ/mol, respectively. The XRD study revealed the presence of a second phase, Zn3B2O6 formed when the B2O3 content was > 1 mol %. The formation of Zn3B2O6 phase gave rise to an increase of the grain growth kinetic exponent and the grain growth activation energy. The kinetic grain growth exponent value (n) and the activation energy for the grain growth of the 2 mol % B2O3-doped ZnO ceramics were found to be 3 and 307 kJ/mol, respectively. This can be attributed to the second particle drag (pinning) mechanism in the liquid phase sintering.

Keywords : boron oxide; grain growth; zinc oxide

References

About the article

Received: 2014-05-13

Accepted: 2014-12-08

Published Online: 2015-07-11

Published in Print: 2015-06-01


Citation Information: Materials Science-Poland, ISSN (Online) 2083-134X, DOI: https://doi.org/10.1515/msp-2015-0029.

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© 2015. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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[1]
Gökhan Hardal and Berat Yüksel Price
Metallurgical and Materials Transactions A, 2017, Volume 48, Number 4, Page 2090
[2]
Berat Yüksel Price and Gökhan Hardal
Journal of Materials Science: Materials in Electronics, 2016, Volume 27, Number 9, Page 9226

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