A5032418835- Magnetic and transport properties of perovskites and related materials
- Advancements in Solid Oxide Fuel Cells
- Magnetic Properties of Alloys
- High Entropy Alloys Studies
- Thermal Expansion and Ionic Conductivity
- Ferroelectric and Piezoelectric Materials
- High-Temperature Coating Behaviors
- Chalcogenide Semiconductor Thin Films
- Multiferroics and related materials
- Hydrogen Storage and Materials
- Inorganic Chemistry and Materials
- Advanced Thermoelectric Materials and Devices
- Microwave Dielectric Ceramics Synthesis
- Advanced ceramic materials synthesis
- Electronic and Structural Properties of Oxides
- Advanced Condensed Matter Physics
- Thermal properties of materials
- Chemical Synthesis and Characterization
- Metal and Thin Film Mechanics
- Catalytic Processes in Materials Science
- Advanced materials and composites
- Catalysis and Oxidation Reactions
- MXene and MAX Phase Materials
- Crystallization and Solubility Studies
- Boron and Carbon Nanomaterials Research
Uppsala University
2018-2021
Chalmers University of Technology
2015-2021
Stockholm University
2010-2015
Jiangxi Academy of Sciences
2015
Refractory high-entropy alloys (RHEAs), comprising group IV (Ti, Zr, Hf), V (V, Nb, Ta), and VI (Cr, Mo, W) refractory elements, can be potentially new generation high-temperature materials. However, most existing RHEAs lack room-temperature ductility, similar to conventional metals alloys. Here, we propose an alloy design strategy intrinsically ductilize based on the electron theory more specifically decrease number of valence electrons through controlled alloying. A ductile RHEA,...
Thermoelectric (TE) generators that efficiently recycle a large portion of waste heat will be an important complementary energy technology in the future. While many efficient TE materials exist lower temperature region, few are at high temperatures. Here, we present properties high-entropy alloys (HEAs), as potential new class materials. We show their can controlled significantly by changing valence electron concentration (VEC) system with appropriate substitutional elements. Both electrical...
The low cost, rare earth free τ-phase of MnAl has high potential to partially replace bonded Nd2Fe14B permanent magnets. However, the is metastable and it experimentally difficult obtain powders suitable for magnet alignment process, which requires fine have an appropriate microstructure purity. In this work, a new method make purity presented. A Mn0.55Al0.45C0.02 alloy was synthesized by drop synthesis method. material subjected cryo milling followed flash heating process. crystal structure...
Designing alloys with an accurate temperature-independent electrical response over a wide temperature range, specifically low coefficient of resistance (TCR), remains big challenge from material design point view. More than century after their discovery, Constantan (Cu-Ni) and Manganin (Cu-Mn-Ni) remain the top choice for strain gauge applications high-quality resistors up to 473-573 K. Here, average TCR is demonstrated that ≈800 times smaller in range 5-300 K >800 any these standard...
The high-temperature thermal expansion and electronic transport properties of the B-site substituted LaCoO3 with both variable oxidation state cobalt between +2 +3 (La2Co(Ti1−xMgx)O6, 0 ≤ x 0.5) Co3+-content relative to other B-cations (La2Co1+z(Ti0.5Mg0.5)1−zO6, 0.2 z 0.6) have been investigated. Based on temperature dependence expansion, Seebeck coefficient, three different groups compositions according their symmetries can be allocated. It was found that coefficients (TECs) studied...
Entropy stabilised materials have possibilities for tailoring functionalities to overcome challenges in science. The concept of configurational entropy can also be applied metal oxides, but it is unclear whether these could considered as solid solutions the case perovskite-structured oxides and if plays a stabilising role. In this study, compositionally complex perovskite LnMO3 (Ln = La, Nd, Sm, Ca Sr, M Ti, Cr, Mn, Fe, Co, Ni, Cu), are investigated their phase stability magnetic...
Ceramic samples of the multiferroic perovskite Pb(Fe1−xScx)2∕3W1∕3O3 with 0 ≤ x 0.4 have been synthesized using a conventional solid-state reaction method, and investigated experimentally theoretically first-principle calculations. Rietveld analyses joint synchrotron X-ray neutron diffraction patterns show formation pure crystalline phase cubic (Fm3̅m) structure partial ordering in B-sites. The replacement Fe by Sc leads to increase cation order between B′ B′′ sites. As non-magnetic Sc3+...
The hydride Ba(3)Si(4)H(x) (x = 1-2) was prepared by sintering the Zintl phase Ba(3)Si(4), which contains Si(4)(6-) butterfly-shaped polyanions, in a hydrogen atmosphere at pressures of 10-20 bar and temperatures around 300 °C. Initial structural analysis using powder neutron X-ray diffraction data suggested that adopts Ba(3)Ge(4)C(2) type [space group I4/mcm (No. 140), ≈ 8.44 Å, c 11.95 Z 8] where Ba atoms form three-dimensional array corner-condensed octahedra, are centered H atoms....
Abstract Ba 3 Si 4 H x (x = 1‐2) is prepared by pressurized sintering of the 6‐ butterfly‐shaped polyanions containing Zintl phase in 2 (corundum crucible an autoclave, 10 bar (20 D ), 300 °C, 40 h).