Hello everyone... I am working on synthesis of MgAgSb for thermoelectric application through high energy ball milling and spark plasma sintering technique. In spite of following all the precautionary measurements i am not getting the pure phase of MgAgSb. Various impurities (Mg3Sb2, Ag3Sb, Sb) are associated with final product detected by XRD, which ultimately reduce the ZT value through high thermal conductivity and lowering electrical conductivity and seebeck coefficient. is there any suggestion to avoid these impurities during synthesis.
Younas Iqbal
I assume that you've studied the phase diagram for the system. The compound has a very limited region of stability. See attached from: https://www.nature.com/articles/s41598-017-02808-8.pdf
My suspicion is that your conditions are far too aggressive for single compound formation.
Can you look this link
https://www.researchgate.net/deref/https%3A%2F%2Fwww.nature.com%2Farticles%2Fs41598-017-02808-8.pdf
Thanks Dr Abdelkader Dehbi and Dr Alan F Rawle for sharing useful informations
Below link may give you insight High thermoelectric performance of MgAgSb-based materials
https://www.sciencedirect.com/science/article/abs/pii/S2211285514000688
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