Preparation of A Thermoelectric Composite of AgSbTe_2/Ag_2Te by Mechanical Alloying
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概要
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Synthesis of AgSbTe<SUB>2</SUB>/Ag<SUB>2</SUB>Te composite by mechanical alloying from elemental powders is described. Mechanical alloying was done by vibratory ball milling with a ball-to-powder ratio of 100:1. The studied composition range was Sb<SUB>2</SUB>Te<SUB>3</SUB>-xmol%Ag<SUB>2</SUB>Te (x=43-70); the (β+Ag<SUB>2</SUB>Te) region in the Sb<SUB>2</SUB>Te<SUB>3</SUB>-Ag<SUB>2</SUB>Te phase diagram. XRD analysis showed that after sufficient milling β compound AgSbTe<SUB>2</SUB> was found to be formed for x=43. The composites of various compositions were formed depending on the initial mixing ratios. The sintered compacts of the mechanically alloyed powders had homogeneous composite microstructures and exhibited the increase in the connectivity of the second phase Ag<SUB>2</SUB>Te in the AgSbTe<SUB>2</SUB> matrix with increase in the Ag<SUB>2</SUB>Te content.
- 社団法人 粉体粉末冶金協会の論文
- 2003-11-15
著者
-
Okamura Hiroshi
Department Of Materials Processing Graduate School Of Engineering Tohoku University
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Watanabe Ryuzo
Department Of Material Processing Graduate School Of Engineering Tohoku University
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