Preparation and property of BaTi2O5 ceramics by arc-melting and spark plasma sintering

2012 ◽  
Vol 28 (4) ◽  
pp. 256-260 ◽  
Author(s):  
J. Peng ◽  
C. B. Wang ◽  
L. Li ◽  
Q. Shen ◽  
L. M. Zhang
2015 ◽  
Vol 45 (3) ◽  
pp. 1803-1812 ◽  
Author(s):  
Hiroaki Anno ◽  
Takahiro Ueda ◽  
Shusaku Hirata ◽  
Tomoki Kameyama ◽  
Tsutomu Iida ◽  
...  

MRS Advances ◽  
2016 ◽  
Vol 1 (60) ◽  
pp. 3971-3976 ◽  
Author(s):  
Miharu Iida ◽  
Tomoyuki Nakamura ◽  
Kenjiro Fujimoto ◽  
Yuki Yamaguchi ◽  
Ryuji Tamura ◽  
...  

ABSTRACTThe magnesium compound Mg2Si and its solid solutions are expected asn-type thermoelectric (TE) material because they are non-toxic, have a large Clarke number, and are light weight. In this study, we improved TE performance by doping Ge into Sb-doped Mg2Si to cause phonon scattering and increase carrier concentration. A bulk of Sb-doped Si-Ge alloy as the raw material was fabricated using an arc-melting method. A high-purity Mg2Si was synthesized from metal Mg and Sb-doped Si-Ge alloy using spark plasma sintering equipment. For the samples with the same Sb concentration, the electrical conductivity was equivalent. On the other hand, the Seebeck coefficient was dependent on Ge concentration. Due to phonon scattering, thermal conductivity decreased by a small amount of Ge doping andκphdominated for thermal conduction. The minimum thermal conductivity of Mg2Si0.90Ge0.10was 2.25 W/mK (κph: 2.06 W/mK,κel: 0.19 W/mK). The dimensionless figure of merit (ZT) for the Mg2Si0.945Ge0.05Sb0.005sample was higher than that of the others due to reducing thermal conductivity and increasing carrier concentration. The maximumZTwas 0.47 at 713 K.


2018 ◽  
Vol 215 (6) ◽  
pp. 1700769
Author(s):  
Suphagrid Wongprakarn ◽  
Supree Pinitsoontorn ◽  
Sora-at Tanusilp ◽  
Ken Kurosaki

2011 ◽  
Vol 49 (01) ◽  
pp. 40-45 ◽  
Author(s):  
Hyun-Kuk Park ◽  
Seung-Min Lee ◽  
Hee-Jun Youn ◽  
Ki-Sang Bang ◽  
Ik-Hyun Oh

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