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(Co, Nb, Sm)-Doped tin dioxide varistor ceramics sintered using nanopowders prepared by coprecipitation method

Hajieh Bastami, Ehsan Taheri-Nassaj, Philippe Smet UGent, Katleen Korthout UGent and Dirk Poelman UGent (2011) JOURNAL OF THE AMERICAN CERAMIC SOCIETY. 94(10). p.3249-3255
abstract
(Co, Nb, Sm)-doped SnO2-based ceramic with varistor characteristics was successfully fabricated by a conventional sintering of nanosized (Co, Nb, Sm)-doped SnO2 powders prepared by coprecipitation method. Values of α∼38 and EB=1430 V/mm were obtained for the varistor doped with 0.05 mol % Sm2O3, sintered at 1200°C for 1 h. Microstructure development was studied by scanning and transmission electron microscopy, elemental analysis, and X-ray diffraction. The mean grain size of the SnO2-based varistor was 1.75 μm. No other phase besides SnO2 was observed in the varistor doped with 0.05 mol % Sm2O3. The presence of Nb, Co, and Sm inside the SnO2 grains confirmed the formation of solid solution. No segregation of Nb was observed and Nb atoms were homogeneously distributed. The excess amounts of Co were segregated at triple-junctions between SnO2 grains. A Sm-rich region with a typical thickness of 65 nm was observed at the grain boundary of the varistor.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
GRAIN-BOUNDARY PHENOMENA, ZINC-OXIDE VARISTORS, NONLINEAR ELECTRICAL BEHAVIOR, NONOHMIC BEHAVIOR, ZNO VARISTOR, FULLY DENSE, SYSTEM, SNO2-BASED VARISTORS, PLAUSIBLE CONCEPTS, DOPED SNO2 VARISTORS
journal title
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
J. Am. Ceram. Soc.
volume
94
issue
10
pages
3249 - 3255
Web of Science type
Article
Web of Science id
000295524300023
JCR category
MATERIALS SCIENCE, CERAMICS
JCR impact factor
2.272 (2011)
JCR rank
2/25 (2011)
JCR quartile
1 (2011)
ISSN
0002-7820
DOI
10.1111/j.1551-2916.2011.04467.x
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1941430
handle
http://hdl.handle.net/1854/LU-1941430
date created
2011-11-10 12:02:49
date last changed
2016-12-19 15:46:40
@article{1941430,
  abstract     = {(Co, Nb, Sm)-doped SnO2-based ceramic with varistor characteristics was successfully fabricated by a conventional sintering of nanosized (Co, Nb, Sm)-doped SnO2 powders prepared by coprecipitation method. Values of \ensuremath{\alpha}\ensuremath{\sim}38 and EB=1430 V/mm were obtained for the varistor doped with 0.05 mol \% Sm2O3, sintered at 1200{\textdegree}C for 1 h. Microstructure development was studied by scanning and transmission electron microscopy, elemental analysis, and X-ray diffraction. The mean grain size of the SnO2-based varistor was 1.75 \ensuremath{\mu}m. No other phase besides SnO2 was observed in the varistor doped with 0.05 mol \% Sm2O3. The presence of Nb, Co, and Sm inside the SnO2 grains confirmed the formation of solid solution. No segregation of Nb was observed and Nb atoms were homogeneously distributed. The excess amounts of Co were segregated at triple-junctions between SnO2 grains. A Sm-rich region with a typical thickness of 65 nm was observed at the grain boundary of the varistor.},
  author       = {Bastami, Hajieh and Taheri-Nassaj, Ehsan and Smet, Philippe and Korthout, Katleen and Poelman, Dirk},
  issn         = {0002-7820},
  journal      = {JOURNAL OF THE AMERICAN CERAMIC SOCIETY},
  keyword      = {GRAIN-BOUNDARY PHENOMENA,ZINC-OXIDE VARISTORS,NONLINEAR ELECTRICAL BEHAVIOR,NONOHMIC BEHAVIOR,ZNO VARISTOR,FULLY DENSE,SYSTEM,SNO2-BASED VARISTORS,PLAUSIBLE CONCEPTS,DOPED SNO2 VARISTORS},
  language     = {eng},
  number       = {10},
  pages        = {3249--3255},
  title        = {(Co, Nb, Sm)-Doped tin dioxide varistor ceramics sintered using nanopowders prepared by coprecipitation method},
  url          = {http://dx.doi.org/10.1111/j.1551-2916.2011.04467.x},
  volume       = {94},
  year         = {2011},
}

Chicago
Bastami, Hajieh, Ehsan Taheri-Nassaj, Philippe Smet, Katleen Korthout, and Dirk Poelman. 2011. “(Co, Nb, Sm)-Doped Tin Dioxide Varistor Ceramics Sintered Using Nanopowders Prepared by Coprecipitation Method.” Journal of the American Ceramic Society 94 (10): 3249–3255.
APA
Bastami, H., Taheri-Nassaj, E., Smet, P., Korthout, K., & Poelman, D. (2011). (Co, Nb, Sm)-Doped tin dioxide varistor ceramics sintered using nanopowders prepared by coprecipitation method. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 94(10), 3249–3255.
Vancouver
1.
Bastami H, Taheri-Nassaj E, Smet P, Korthout K, Poelman D. (Co, Nb, Sm)-Doped tin dioxide varistor ceramics sintered using nanopowders prepared by coprecipitation method. JOURNAL OF THE AMERICAN CERAMIC SOCIETY. 2011;94(10):3249–55.
MLA
Bastami, Hajieh, Ehsan Taheri-Nassaj, Philippe Smet, et al. “(Co, Nb, Sm)-Doped Tin Dioxide Varistor Ceramics Sintered Using Nanopowders Prepared by Coprecipitation Method.” JOURNAL OF THE AMERICAN CERAMIC SOCIETY 94.10 (2011): 3249–3255. Print.