Giant elastocaloric temperature change and its cyclic stability in [001]-oriented Cu71Al17.5Mn11.5 single crystal

Scripta Materialia, Journal Year: 2025, Volume and Issue: 261, P. 116603 - 116603

Published: Feb. 18, 2025

Language: Английский

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Achieving kilowatt-scale elastocaloric cooling by a multi-cell architecture

Nature, Journal Year: 2025, Volume and Issue: 639(8053), P. 87 - 92

Published: Feb. 26, 2025

Language: Английский

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Ultrasensitive barocaloric material for room-temperature solid-state refrigeration

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: April 28, 2022

Solid-state refrigeration based on caloric effects is an energetically efficient and environmentally friendly technology, which deemed as a potential alternative to the conventional vapor-compression technology. One of greatest obstacles real application huge driving fields. Here, we report giant barocaloric effect in inorganic NH4I with maximum entropy changes {\Delta}S_BCE^max ~89 J K-1 kg-1 around room temperature, associated orientationally order-disorder phase transition. The transition Tt, varies dramatically pressure rate dTt/dP ~0.81 K MPa-1, leads very much small saturation {\Delta}P ~20 MPa, unprecedentedly large strength |{\Delta}S_BCE^max/{\Delta}P| ~4.45 well broad temperature window ~68 under 80 MPa pressure. Comprehensive characterization crystal structure dynamics by neutron scattering measurements reveals strong reorientation-vibration coupling that responsible for sensitivity Tt. This work expected advance practical refrigeration.

Language: Английский

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Driving Barocaloric Effects in a Molecular Spin-Crossover Complex at Low Pressures

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(14), P. 6493 - 6503

Published: April 1, 2022

Barocaloric effects─thermal changes in a material induced by applied hydrostatic pressure─offer promise for creating solid-state refrigerants as alternatives to conventional volatile refrigerants. To enable efficient and scalable barocaloric cooling, materials that undergo high-entropy, reversible phase transitions the solid state response small change pressure are needed. Here, we report pressure-induced spin-crossover (SCO) molecular iron(II) complex Fe[HB(tz)3]2 (HB(tz)3- = bis[hydrotris(1,2,4-triazol-1-yl)borate]) drive giant effects at easily accessible pressures. Specifically, high-pressure calorimetry powder X-ray diffraction studies reveal shifts low 10 bar reversibly induce nonzero isothermal entropy changes, shift of 150 induces large (>90 J kg-1 K-1) adiabatic temperature (>2 K). Moreover, demonstrate thermodynamics SCO transition can be fine-tuned through systematic deuteration tris(triazolyl)borate ligand. These results provide new insights into further establish promising materials.

Language: Английский

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Taking control of salts

Nature Energy, Journal Year: 2023, Volume and Issue: 8(3), P. 226 - 227

Published: Feb. 24, 2023

Language: Английский

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Dissipation losses limiting first-order phase transition materials in cryogenic caloric cooling: A case study on all-d-metal Ni(-Co)-Mn-Ti Heusler alloys

Acta Materialia, Journal Year: 2023, Volume and Issue: 246, P. 118695 - 118695

Published: Jan. 10, 2023

Ni-Mn-based Heusler alloys, in particular all-d-metal Ni(-Co)-Mn-Ti, are highly promising materials for energy-efficient solid-state refrigeration as large multicaloric effects can be achieved across their magnetostructural martensitic transformation. However, no comprehensive study on the crucially important transition entropy change $\Delta s_t$ exists so far Ni(-Co)-Mn-Ti. Here, we present a systematic analyzing composition and temperature dependence of s_t$. Our results reveal substantial structural contribution approximately 65 J(kgK)$^{-1}$, which is compensated at lower temperatures by an increasingly negative associated with magnetic subsystem. This leads to compensation $T_{comp}$ 75 K 300 Ni$_{35}$Co$_{15}$Mn$_{50-y}$Ti$_{y}$ Ni$_{33}$Co$_{17}$Mn$_{50-y}$Ti$_{y}$, respectively, below transformations arrested. In addition, simultaneously measured responses magnetic, electronic subsystems temperature- field-induced transformation near $T_{comp}$, showing abnormal increase hysteresis consequently dissipation energy cryogenic temperatures. Simultaneous measurements magnetization adiabatic T_{ad}$ pulsed fields sign positive irreversible up 15 consequence increased losses decreased heat capacity. Most importantly, this phenomenon universal, it applies any first-order material non-negligible stimulus, effectively limiting utilization caloric gas liquefaction

Language: Английский

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Relating microstructure to magnetocaloric properties in RE36Tb20Co20Al24 (RE = Gd, Dy or Ho) high-entropy metallic-glass microwires designed by binary eutectic clusters method

Journal of Material Science and Technology, Journal Year: 2023, Volume and Issue: 149, P. 167 - 176

Published: Feb. 2, 2023

Language: Английский

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Thermal multiferroics in all-inorganic quasi-two-dimensional halide perovskites

Nature Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 5, 2024

Language: Английский

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Advanced Design and Manufacturing Approaches for Structures with Enhanced Thermal Management Performance: A Review

Advanced Materials Technologies, Journal Year: 2024, Volume and Issue: 9(15)

Published: June 12, 2024

Abstract Advanced design methods and manufacturing techniques are crucial for developing thermal management structures, essential the efficient operation of complex equipment. This study provides a thorough review methodologies advanced technologies materials structures. It identifies key challenges critically evaluates integration innovative principles, such as biomimicry topology optimization, into solutions. The analysis delves evolution theories preparation techniques, with specific focus on modern needs research directions, particularly highlighting components fabricated using additive their effectiveness in meeting requirements. Current focuses designing structures tailored to various cooling methods, including air‐cooling, liquid‐cooling, heat exchanger cooling, pipe cooling. These designs utilize phase change materials, electrocaloric thermoelectric achieve optimal performance. Additionally, emerging innovations like solid‐liquid mixed transfer elastocaloric effect garnering increased interest. Enhancing through rigorous numerical simulations is critical improving engineering applicability. However, overcoming related commercialization practical utilization these remains pressing need.

Language: Английский

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Prediction and understanding of barocaloric effects in orientationally disordered materials from molecular dynamics simulations

npj Computational Materials, Journal Year: 2024, Volume and Issue: 10(1)

Published: Jan. 13, 2024

Abstract Due to its high energy efficiency and environmental friendliness, solid-state cooling based on the barocaloric (BC) effect represents a promising alternative traditional refrigeration technologies relying greenhouse gases. Plastic crystals displaying orientational order-disorder solid-solid phase transitions have emerged among most gifted materials which realize full potential of BC cooling. However, comprehensive understanding atomistic mechanisms effects are sustained is still missing, rigorous systematic methods for quantitatively evaluating anticipating them not been yet established. Here, we present computational approach assessment prediction in orientationally disordered that relies molecular dynamics simulations emulates quasi-direct calorimetric measurements. Remarkably, proposed allows precise determination partial contributions total entropy stemming from vibrational degrees freedom. Our simulation method applied technologically relevant material CH 3 NH PbI (MAPI), finding giant isothermal changes (∣Δ S ∣ ~ 10 J K −1 kg ) under moderate pressure shifts ~0.1 GPa. Intriguingly, our analysis MAPI reveals freedom cations, their reorientational motion, major influence change accompanies transition.

Language: Английский

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