Thermoelectric property and x-ray absorption near edge structure studies on Si-doped CaMnO3−δ
學年 104
學期 2
出版（發表）日期 2016-02-15
作品名稱 Thermoelectric property and x-ray absorption near edge structure studies on Si-doped CaMnO3−δ
作品名稱（其他語言）
著者 Chia-Jyi Liu; Ankam Bhaskar; J.J. Yuan; Zong-Ren Yang; Shih-Show Chen; Huang-Chin Chen; Fan-Wei Liao; Yu Ting Lin; Ping Hung Yeh; Chun-Yen Lai; Ching-Lin Chang
單位
出版者
著錄名稱、卷期、頁數 Ceramics International 42(3), pp.4048–4053
摘要 We report electrical resistivity, thermopower and Ca K-, Mn L2,3- and O K-edges x-ray absorption near edge structure (XANES) studies on CaMn1−xSixO3−δ with x=0, 0.02, and 0.05. The transport properties measurements indicate that the sample of x=0.02 has the lowest electrical resistivity compared to the samples of x=0 and 0.05. Meanwhile, the temperature dependence of thermopower behaves significantly different for samples of x=0.02 and 0.05. These unusual phenomena are elucidated based on the charge transfer equilibrium principle together with the XANES results, which show that the Si substitution for Mn appears to generate an electron doping effect and lattice distortion. Among the samples, CaMn0.98Si0.02O3−δ exhibits the highest figure of merit of 0.0128 at 300 K. This value represents an improvement of about 52% compared to pristine CaMnO3−δ.
關鍵字 A. Sintering;B. Electron microscopy;C. Electrical conductivity;Thermal properties;Thermal conductivity
語言 en
ISSN 0272-8842;1873-3956
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Ching-Lin Chang
審稿制度 否
國別 GBR
公開徵稿
出版型式 ,電子版,紙本
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/108298 )