Effects of Ag Addition on Microstructure and Thermoelectric Properties of NaxCo2O4 Synthesized by Citric Acid Complex Process
Effects of Ag Addition on Microstructure and Thermoelectric Properties of NaxCo2O4 Synthesized by Citric Acid Complex Process
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Ag添加对柠檬酸络合法合成NaxCo2O4微观结构和热电性能的影响
DOI：
10.2320/matertrans.mra2007171
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发表时间：
2007
影响因子：
1.2
通讯作者：
D. Furumoto
中科院分区：
文献类型：
--
作者：
Mikio Ito;D. Furumoto
以CH 3 COOAg为银源，采用柠檬酸络合法合成了NaxCo 2 O 4 /Ag热电复合材料。煅烧后的前驱体粉末由片状NaxCo 2 O 4颗粒和Ag颗粒组成。Ag的添加恶化了烧结体的晶体学各向异性。然而，该复合材料的电阻率和塞贝克系数分别明显小于和略大于不含银的样品，导致功率因子较大。Ag相分散在NaxCo 2 O 4基体中，含量约为5-17 at.% Co，这被认为是导致塞贝克系数增加的原因。
A thermoelectric Na x Co 2 O 4 /Ag composite was synthesized by citric acid complex process using CH 3 COOAg as an Ag source. The powder precursor after calcination was composed of plate-like Na x Co 2 O 4 grains and Ag particles. The Ag addition deteriorated crystallographic anisotropy of the sintered body. However, the electrical resistivity and the Seebeck coefficient of this composite were significantly smaller and slightly larger, respectively, than those of the sample without Ag, resulting in lager power factor. The Ag phase dispersed in the Na x Co 2 O 4 matrix contained about 5-17 at.% Co, which is considered to cause the increase in Seebeck coefficient.