Influence of Ce substitution on the order-to-disorder structural transition, thermal expansion and electrical properties in Sm2Zr2−xCexO7 system

RSC Advances ◽  
2014 ◽  
Vol 4 (24) ◽  
pp. 12321 ◽  
Author(s):  
D. S. Vaisakhan Thampi ◽  
P. Prabhakar Rao ◽  
A. N. Radhakrishnan
Keyword(s):  
Thermal Expansion ◽  
Electrical Properties ◽  
Structural Transition ◽  
Ce Substitution

Influence of Cr deficiency on sintering, thermal expansion and electrical properties of La0.75Sr0.25Cr1−xO3−δ as a SOFC interconnect material

2016 ◽  
Vol 30 (11) ◽  
pp. 1650127 ◽  
Author(s):  
Yi Ren ◽  
Wen Ma ◽  
Xiaoying Li ◽  
Jun Wang ◽  
Yu Bai ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Electrical Properties ◽  
Perovskite Phase ◽  
Ignition Process ◽  
Thermal Expansion Coefficients ◽  
Auto Ignition ◽  
Pure Perovskite Phase ◽  
Maximum Conductivity ◽  
Expansion Coefficients ◽  
Interconnect Material

The SOFC interconnect materials La[Formula: see text]Sr[Formula: see text]Cr[Formula: see text]O[Formula: see text] [Formula: see text]–[Formula: see text] were prepared using an auto-ignition process. The influences of Cr deficiency on their sintering, thermal expansion and electrical properties were investigated. All the samples were pure perovskite phase after sintering at 1400[Formula: see text]C for 4 h. The cell volume of La[Formula: see text]Sr[Formula: see text]Cr[Formula: see text]O[Formula: see text] decreased with increasing Cr deficient content. The relative density of the sintered bulk samples increased from 93.2% [Formula: see text] to a maximum value of 94.7% [Formula: see text] and then decreased to 87.7% [Formula: see text]. The thermal expansion coefficients of the sintered bulk samples were in the range of [Formula: see text]–[Formula: see text] (30–1000[Formula: see text]C), which are compatible with that of YSZ. Among the investigated samples, the sample with 0.02 Cr deficiency had a maximum conductivity of 40.4 Scm[Formula: see text] and the lowest Seebeck coefficient of 154.8 [Formula: see text]VK[Formula: see text] at 850[Formula: see text]C in pure He. The experimental results indicate that La[Formula: see text]Sr[Formula: see text]Cr[Formula: see text]O[Formula: see text] has the best properties and is much suitable for SOFC interconnect material application.

Thermal expansion and electrical properties of Fe-doped CaCu3Ti4O12 ceramics

2021 ◽  
Vol 258 ◽  
pp. 123996
Author(s):  
N.A. Zhuk ◽  
M.G. Krzhizhanovskaya ◽  
N.A. Sekushin ◽  
V.V. Kharton ◽  
L.А. Koksharova
Keyword(s):  
Thermal Expansion ◽  
Electrical Properties

Microstructure of TiB2 liquid phase sintered with Ni3Al

1983 ◽  
Vol 41 ◽  
pp. 62-63
Author(s):  
P. Angelini ◽  
J. Bentley ◽  
C. B. Finch ◽  
P. S. Sklad
Keyword(s):  
Solid Solution ◽  
Thermal Expansion ◽  
Liquid Phase ◽  
Electrical Properties ◽  
Grain Growth ◽  
Hot Pressing ◽  
Liquid Phase Sintering ◽  
Intergranular Phase ◽  
Phase Development ◽  
Al Powder

TiB2 is a ceramic material which possesses exceptional thermal, chemical, and electrical properties. Commercial powders can be formed into bulk pieces by hot pressing at temperatures near 2000°C. However, this produces excessive grain growth which can lead to cracking and low mechanical integrity due to the relatively large anisotropic thermal expansion of the TiB2 grains. Liquid phase sintering can be used to produce structural forms of TiB2 by hot pressing at temperatures near 1450°C. This process limits the TiB2 grain growth but introduces an intergranular phase. Previous work used Ni as a binder and under most hot-pressing conditions this resulted in the formation of a Ni3B intergranular phase. Additional binders are being considered to understand the phase development during liquid-phase sintering and to improve the properties of the bonded TiB2 forms.The present research concerns the use of Ni3Al as a binder for TiB2. The Ni3Al powder was a physical mixture of 32 wt % NiAl and 68 wt % of a solid solution of 95 at. % Ni with 5 at. % Al powders.

scholarly journals Crystal structure, thermal expansion and electrical conductivity of LaCoxNiyMozO3

2016 ◽  
Vol 45 (39) ◽  
pp. 15290-15293
Author(s):  
V. Øygarden ◽  
T. Grande
Keyword(s):  
Crystal Structure ◽  
Electrical Conductivity ◽  
Thermal Expansion ◽  
Electrical Properties ◽  
System P

The effect of Mo-substitution on the crystal structure, thermal expansion and electrical properties is investigated for the LaCoxNiyMozO3 system.

Phase transition, thermal expansion and electrical properties of BiCu2VO6

2005 ◽  
Vol 178 (9) ◽  
pp. 2927-2933 ◽  
Author(s):  
Ivana Radosavljević Evans ◽  
Shanwen Tao ◽  
John T.S. Irvine
Keyword(s):  
Phase Transition ◽  
Thermal Expansion ◽  
Electrical Properties
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