A5000383852- Advanced Thermoelectric Materials and Devices
- Heusler alloys: electronic and magnetic properties
- 2D Materials and Applications
- Thermal Expansion and Ionic Conductivity
- Chalcogenide Semiconductor Thin Films
- Topological Materials and Phenomena
- Solid-state spectroscopy and crystallography
- Inorganic Fluorides and Related Compounds
- Machine Learning in Materials Science
- Energy Harvesting in Wireless Networks
- Museums and Cultural Heritage
- Perovskite Materials and Applications
- Innovative Energy Harvesting Technologies
- Advanced Sensor and Energy Harvesting Materials
- Thermal properties of materials
Heriot-Watt University
2019-2025
A review of recent developments in half-Heusler thermoelectrics for waste heat recovery.
Abstract Ambient energy harvesting has great potential to contribute sustainable development and address growing environmental challenges. Converting waste from energy-intensive processes systems (e.g. combustion engines furnaces) is crucial reducing their impact achieving net-zero emissions. Compact harvesters will also be key powering the exponentially smart devices ecosystem that part of Internet Things, thus enabling futuristic applications can improve our quality life homes, cities,...
Abstract Bandstructure engineering is a key route for thermoelectric performance enhancement. Here, 20–50% Seebeck ( S ) enhancement reported XNiCu y Sn half‐Heusler samples based on X = Ti. This novel electronic effect attributed to the emergence of impurity bands finite extent, due Cu dopants. Depending dispersion, and offset with respect parent material, these are shown enhance different degrees. Experimentally, this controllable by Ti content samples, addition Zr/Hf gradually removing At...
Metal phosphides combine elemental abundance, structural and bonding diversity, are promising thermoelectric materials.
Addition of Cu to XNiSn half-Heuslers improves homogeneity and reduces thermal conductivity without affecting electron mobility.
Semimetals have recently emerged at the forefront of contemporary thermoelectrics research. In this paper, we show that candidate Dirac semimetal CaAgP forms with a stable CaAg0.9P composition. Intentionally, Ag-deficient shows promising thermoelectric figure merit, achieving zT = 0.43 660 K. This derives from moderate power factors, S2/ρ 1.25 mW m−1 K−2, and low lattice thermal conductivity, κlat 1.2 W K−1. The properties are consistent small bandgap semiconductor. High levels doping key to...
Microstructure and point defects are central to thermoelectric performance in vacancy half-Heuslers.
Two promising copper phosphides with large thermoelectric power factors are reported.
In situ synchrotron powder X-ray diffraction (PXRD) study was conducted on sodium and potassium tetrafluoroborate (NaBF4 KBF4) to elucidate structural changes across solid–solid phase transitions over multiple heating–cooling cycles. The transition temperatures from measurements are consistent with the differential scanning calorimetry data (∼240 °C for NaBF4 ∼290 KBF4). crystal structure of high-temperature (HT) determined PXRD data. HT disordered crystallizes in hexagonal, space group...
Abstract A key part of optimising thermoelectric materials is understanding the electronic scattering mechanism. For half-Heusler (HH) thermoelectrics, dominant mechanisms are acoustic phonon in pure systems and alloy highly alloyed systems. In this report, significance residual resistivity ρ 0 highlighted. Large values can lead to misidentification mechanism when only high-temperature ( T ) data available. straightforward approach analyse proposed applied a range HH This reveals large...
This toolkit outlines the steps taken by Communities & Crowds project to give ownership local volunteers identify photographs that reflect their interests; digitise them museum standards; and share these collections with a global audience via an online crowdsourcing project. is AHRC-funded collaboration between NSMM (Bradford, UK), Adler Planetarium (Chicago, IL), National Museums Scotland (NMS) (Edinburgh, Oxford University (Oxford, UK). It re-examines role of volunteer combining...