摘要
以Zn(OH)2和In2O3为原料,用放电等离子烧结(SPS)技术制备了层状结构的(ZnO)mIn2O3(m=5,7,9)织构热电材料。通过XRD、SEM以及ZEM表征样品的物相、显微组织和电输运性能,分析了m值和烧结温度的影响机制。结果表明,(ZnO)mIn2O3(m=5,7,9)块体材料在平行于压力方向沿(00l)择优取向,呈层状结构特征。固定烧结温度为1323K时,(ZnO)7In2O3样品在773K取得最大功率因子1.88×10-4W·m-1K-2。优化(ZnO)9In2O3样品的烧结温度,发现降低烧结温度增加了Seebeck系数,1223K烧结时在773K取得最大功率因子2.2×10-4W·m-1K-2。
Textured (ZnO)mIn2O3 (m=5, 7, 9) thermoelectric materials were prepared by Spark Plasma Sintering (SPS) using Zn(OH)2 and In2O3 powders as raw materials. The phase structure, microstructures and the thermoelectric properties were characterized by XRD, SEM and ZEM with a special emphasis of the m value and the sintering temperature. (ZnO) m In2O3 (m=5, 7, 9) bulks parallel to the pressing direction were preferentially oriented on the axial (00l) with a layered microstructure. The (ZnO)7In2O3 bulk shows the largest power factor of 1.88×10 -4 W·m -1 K -2 at 773K as fixed sintering temperature at 1323 K. Optimizing sintering temperature form 1323 to 1223 K, the (ZnO)9In2O3 bulk sinterd at 1223K attains the largest power factor of 2.2×10 -4 W·m -1 K -2 at 773 K due to the improved Seebeck coefficient.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第S1期218-221,共4页
Rare Metal Materials and Engineering
基金
北京市自然科学基金(2112028)
