In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 39, No. 6A ( 2000-06-01), p. L531-
Abstract:
Electric resistivity, thermoelectric power and thermal conductivity
of a polycrystalline sample of the composite crystal [Ca 2 CoO 3.34 ] 0.614 [CoO 2 ], also known as Ca 3 Co 4 O 9 ,
have been measured below 300 K. Metallic conductivity accompanied by large thermoelectric power has been observed down to 50 K. At 300 K, the
sample exhibits a thermoelectric power of S = 133 µV·K -1 ,
resistivity of ρ= 15 mΩ·cm and thermal conductivity of κ= 9.8 mW·K -1 ·cm -1 .
The resulting dimensionless figure of merit becomes Z T 300 = 3.5×10 -2 , which is comparable to the value reported
for a polycrystalline sample of NaCo 2 O 4 , indicating that the title compound is a potential
candidate for a thermoelectric material.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.39.L531
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2000
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
2006801-3
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