Comparative Study of Magnetocaloric Effect in La0.67Ca0.20Sr0.13MnO3 Manganite Prepared by Sol-Gel Method and Spark Plasma Sintering

2018 ◽  
Vol 32 (4) ◽  
pp. 993-999 ◽  
Author(s):  
Z. R. Zhao ◽  
T. Jing ◽  
G. F. Wang ◽  
Y. F. Li ◽  
Q. Ma ◽  
...  
Keyword(s):  
Comparative Study ◽  
Magnetocaloric Effect ◽  
Spark Plasma Sintering ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Effect of Co-Doping on Thermoelectric Properties of n-Type Bi2Te3 Nanostructures Fabricated Using a Low-Temperature Sol-Gel Method

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2719
Author(s):  
Syed Irfan ◽  
Muhammad Aizaz Ud Din ◽  
Muhammad Qaisar Manzoor ◽  
Deliang Chen
Keyword(s):  
Low Temperature ◽  
Seebeck Coefficient ◽  
Spark Plasma Sintering ◽  
Thermoelectric Properties ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Co Doped

In this work, a novel low-temperature double solvent sol-gel method was used to fabricate (Sm, Ce, Gd) and (Sn, Se, I) co-doped at Bi and Te-sites, respectively, for Bi2Te3 nanostructures. The phase-purity and high crystallinity of as-synthesized nanostructures were confirmed using X-ray diffraction and high-resolution transmission electron microscopy. The nanopowders were hot-pressed by spark plasma sintering into bulk pellets for thermoelectric properties. The spark plasma sintering temperature significantly affects the Seebeck coefficient and electrical conductivity of bulk Bi2Te3 pellets. The electrical conductivities of co-doped samples decrease with an increase in the temperature, but conversely, the Seebeck coefficient is linearly increasing. The power factor showed that the co-dopants enhanced the thermoelectric properties of Bi2Te3 nanopowders.

scholarly journals Spark Plasma Sintering and Densification Mechanisms of Antimony-Doped Tin Oxide Nanoceramics

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Junyan Wu ◽  
Fei Chen ◽  
Qiang Shen ◽  
Julie M. Schoenung ◽  
Lianmeng Zhang
Keyword(s):  
Spark Plasma Sintering ◽  
Tin Oxide ◽  
Sol Gel ◽  
Doping Content ◽  
Sintering Aids ◽  
Gel Method ◽  
Sol Gel Method ◽  
Plasma Sintering ◽  
Sb Doping ◽  
Spark Plasma

Densification of antimony-doped tin oxide (ATO) ceramics without sintering aids is very difficult, due to the volatilization of SnO2, formation of deleterious phases above 1000°C, and poor sintering ability of ATO particles. In this paper, monodispersed ATO nanoparticles were synthesized via sol-gel method, and then ATO nanoceramics with high density were prepared by spark plasma sintering (SPS) technology using the as-synthesized ATO nanoparticles without the addition of sintering aids. The effect of Sb doping content on the densification was investigated, and the densification mechanisms were explored. The results suggest that ATO nanoparticles derived from sol-gel method show good crystallinity with a crystal size of 5–20 nm and Sb is incorporated into the SnO2crystal structure. When the SPS sintering temperature is 1000°C and the Sb doping content is 5 at.%, the density of ATO nanoceramics reaches a maximum value of 99.2%. Densification mechanisms are explored in detail.

Reactive, nonreactive, and flash spark plasma sintering of Al 2 O 3 /SiC composites—A comparative study

2019 ◽  
Vol 103 (1) ◽  
pp. 520-530
Author(s):  
Karen S. Torosyan ◽  
Alexey S. Sedegov ◽  
Kirill V. Kuskov ◽  
Mohammad Abedi ◽  
Dmitry I. Arkhipov ◽  
...  
Keyword(s):  
Comparative Study ◽  
Spark Plasma Sintering ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sic Composites
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