University of Houston System

U.S. Department of Energy

Ran He

Zhifeng Ren

Boris Kozinsky

Giri Joshi

Jian Yang

Michael Engber

Tej Pantha

Martin Cleary

Discussed herein are half-Heusler thermoelectric materials including niobium, iron, antimony, and titanium that are formed by ball-milling and hot-pressing the ball-milled power to obtain various thermoelectric properties and an average grain size above 1 &#x3bc;m.

Systems and methods of fabrication and use of NbFeSb P-type half-heusler thermoelectric materials

A thermoelectric half-Heusler material comprising niobium (Nb), iron (Fe) and antimony (Sb) wherein the material comprises grains having a mean grain size less than one micron. A method of making a nanocomposite half-Heusler thermoelectric material includes melting constituent elements of the thermoelectric material to form an alloy of the thermoelectric material, comminuting (e.g., ball milling) the alloy of the thermoelectric material into nanometer scale mean size particles, and consolidating the nanometer size particles to form the half-Heusler thermoelectric material comprising at least niobium (Nb), iron (Fe) and antimony (Sb) and having grains with a mean grain size less than one micron.

NbFeSb based half-heusler thermoelectric materials and methods of fabrication and use

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Houston, TX, United States of America

Ran He