Synthesis by spark plasma sintering of a novel protonic/electronic conductor composite: BaCe0.2Zr0.7Y0.1O3-delta /Sr0.95Ti0.9Nb0.1O3-delta (BCZY27/STN95)
Fish, Jason S. ; Ricote, Sandrine ; Lenrick, Filip LU
; Wallenberg, Reine
LU
; Holgate, Tim C.
; O'Hayre, Ryan
and Bonanos, Nikolaos
(2013)
In Journal of Materials Science
48(18).
p.6177-6185
- Abstract
- A novel two-phase ceramic composite (cercer) material consisting of a solid solution of barium cerate and -zirconate doped with yttrium (BaCe0.2Zr0.7Y0.1O3-delta : BCZY27), together with niobium-doped strontium titanate (Sr0.95Ti0.9Nb0.1O3-delta : STN95), has been synthesized by solid-state reaction and sintered conventionally (CS) at 1350-1500 A degrees C, as well as by spark plasma sintering (SPS) at 1300-1350 A degrees C. CS samples were porous and exhibited high degrees of inter-phase reaction. Nickel oxide sintering aids did not improve CS sample density. In contrast, samples made by SPS were significantly denser (> 95 %) and showed less reaction between phases. A pseudo-optimum SPS profile was developed, accounting for the effects... (More)
- A novel two-phase ceramic composite (cercer) material consisting of a solid solution of barium cerate and -zirconate doped with yttrium (BaCe0.2Zr0.7Y0.1O3-delta : BCZY27), together with niobium-doped strontium titanate (Sr0.95Ti0.9Nb0.1O3-delta : STN95), has been synthesized by solid-state reaction and sintered conventionally (CS) at 1350-1500 A degrees C, as well as by spark plasma sintering (SPS) at 1300-1350 A degrees C. CS samples were porous and exhibited high degrees of inter-phase reaction. Nickel oxide sintering aids did not improve CS sample density. In contrast, samples made by SPS were significantly denser (> 95 %) and showed less reaction between phases. A pseudo-optimum SPS profile was developed, accounting for the effects of thermal expansion mismatch between BCZY27 and STN95. X-ray diffraction indicated secondary phases exist, but there was no indication of their presence at grain boundaries based on thorough study of these regions with high-resolution transmission electron microscopy and selective area electron diffraction. We thus suggest that these phases are present as independent grains in the bulk. It is believed these secondary phases inhibit electronic conductivity in the composite. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3973209
- author
- Fish, Jason S.
; Ricote, Sandrine
; Lenrick, Filip
LU
; Wallenberg, Reine
LU
; Holgate, Tim C.
; O'Hayre, Ryan
and Bonanos, Nikolaos
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Materials Science
- volume
- 48
- issue
- 18
- pages
- 6177 - 6185
- publisher
- Springer
- external identifiers
-
- wos:000321285500010
- scopus:84879966065
- ISSN
- 0022-2461
- DOI
- 10.1007/s10853-013-7414-6
- language
- English
- LU publication?
- yes
- id
- 0aafc1c9-efb1-4ea7-b08b-fa1fa7e38500 (old id 3973209)
- date added to LUP
- 2016-04-01 12:55:43
- date last changed
- 2024-01-09 05:14:52
@article{0aafc1c9-efb1-4ea7-b08b-fa1fa7e38500,
abstract = {{A novel two-phase ceramic composite (cercer) material consisting of a solid solution of barium cerate and -zirconate doped with yttrium (BaCe0.2Zr0.7Y0.1O3-delta : BCZY27), together with niobium-doped strontium titanate (Sr0.95Ti0.9Nb0.1O3-delta : STN95), has been synthesized by solid-state reaction and sintered conventionally (CS) at 1350-1500 A degrees C, as well as by spark plasma sintering (SPS) at 1300-1350 A degrees C. CS samples were porous and exhibited high degrees of inter-phase reaction. Nickel oxide sintering aids did not improve CS sample density. In contrast, samples made by SPS were significantly denser (> 95 %) and showed less reaction between phases. A pseudo-optimum SPS profile was developed, accounting for the effects of thermal expansion mismatch between BCZY27 and STN95. X-ray diffraction indicated secondary phases exist, but there was no indication of their presence at grain boundaries based on thorough study of these regions with high-resolution transmission electron microscopy and selective area electron diffraction. We thus suggest that these phases are present as independent grains in the bulk. It is believed these secondary phases inhibit electronic conductivity in the composite.}},
author = {{Fish, Jason S. and Ricote, Sandrine and Lenrick, Filip and Wallenberg, Reine and Holgate, Tim C. and O'Hayre, Ryan and Bonanos, Nikolaos}},
issn = {{0022-2461}},
language = {{eng}},
number = {{18}},
pages = {{6177--6185}},
publisher = {{Springer}},
series = {{Journal of Materials Science}},
title = {{Synthesis by spark plasma sintering of a novel protonic/electronic conductor composite: BaCe0.2Zr0.7Y0.1O3-delta /Sr0.95Ti0.9Nb0.1O3-delta (BCZY27/STN95)}},
url = {{http://dx.doi.org/10.1007/s10853-013-7414-6}},
doi = {{10.1007/s10853-013-7414-6}},
volume = {{48}},
year = {{2013}},
}