Abstract
A series of phonon-liquid electron-crystal materials of β-Cu2-xSe (0 ≤ x ≤ 0.04) is fabricated using hydrothermal synthesis followed by evacuating-and-encapsulating sintering. These materials are characterized using powder X-ray diffraction, field-emission scanning electron micrograph, electronic and thermal transport. Low-temperature X-ray diffraction patterns along with the electronic and thermal transport data reveal that β-Cu2Se exhibit a phase transition at around 160 K. We find that all the electrical conductivity, carrier concentration and thermopower of β-Cu2-xSe increase with copper deficiency content x. A knee behavior is observed in the temperature dependence of both electrical resistivity and thermopower on cooling the samples from room temperature to around 160 K, which could be associated with the structural transition at the corresponding temperature. The thermal conductivity of β-Cu2-xSe at room temperature is found to be larger than that of α-Cu2-xSe.
| Original language | English |
|---|---|
| Pages (from-to) | 2755-2760 |
| Number of pages | 6 |
| Journal | Journal of the European Ceramic Society |
| Volume | 36 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2016 Sep 1 |
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All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry
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Low-temperature phase transition and transport properties of β-Cu2-xSe fabricated using hydrothermal synthesis and evacuating-and-encapsulating sintering. / Bhaskar, Ankam; Hu, Chih Hui; Chang, Ching Lin; Liu, Chia Jyi.
In: Journal of the European Ceramic Society, Vol. 36, No. 11, 01.09.2016, p. 2755-2760.Research output: Contribution to journal › Article
TY - JOUR
T1 - Low-temperature phase transition and transport properties of β-Cu2-xSe fabricated using hydrothermal synthesis and evacuating-and-encapsulating sintering
AU - Bhaskar, Ankam
AU - Hu, Chih Hui
AU - Chang, Ching Lin
AU - Liu, Chia Jyi
PY - 2016/9/1
Y1 - 2016/9/1
N2 - A series of phonon-liquid electron-crystal materials of β-Cu2-xSe (0 ≤ x ≤ 0.04) is fabricated using hydrothermal synthesis followed by evacuating-and-encapsulating sintering. These materials are characterized using powder X-ray diffraction, field-emission scanning electron micrograph, electronic and thermal transport. Low-temperature X-ray diffraction patterns along with the electronic and thermal transport data reveal that β-Cu2Se exhibit a phase transition at around 160 K. We find that all the electrical conductivity, carrier concentration and thermopower of β-Cu2-xSe increase with copper deficiency content x. A knee behavior is observed in the temperature dependence of both electrical resistivity and thermopower on cooling the samples from room temperature to around 160 K, which could be associated with the structural transition at the corresponding temperature. The thermal conductivity of β-Cu2-xSe at room temperature is found to be larger than that of α-Cu2-xSe.
AB - A series of phonon-liquid electron-crystal materials of β-Cu2-xSe (0 ≤ x ≤ 0.04) is fabricated using hydrothermal synthesis followed by evacuating-and-encapsulating sintering. These materials are characterized using powder X-ray diffraction, field-emission scanning electron micrograph, electronic and thermal transport. Low-temperature X-ray diffraction patterns along with the electronic and thermal transport data reveal that β-Cu2Se exhibit a phase transition at around 160 K. We find that all the electrical conductivity, carrier concentration and thermopower of β-Cu2-xSe increase with copper deficiency content x. A knee behavior is observed in the temperature dependence of both electrical resistivity and thermopower on cooling the samples from room temperature to around 160 K, which could be associated with the structural transition at the corresponding temperature. The thermal conductivity of β-Cu2-xSe at room temperature is found to be larger than that of α-Cu2-xSe.
UR - http://www.scopus.com/inward/record.url?scp=84992304893&partnerID=8YFLogxK
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U2 - 10.1016/j.jeurceramsoc.2016.04.031
DO - 10.1016/j.jeurceramsoc.2016.04.031
M3 - Article
AN - SCOPUS:84992304893
VL - 36
SP - 2755
EP - 2760
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 11
ER -