Nacionalni portal odprte znanosti

Oznake: tekočekristalni elastomeri;elastokalorične lastnosti;termomehanska stabilnost;liquid crystalline elastomers;thermomechanical stability;elastocaloric performance;

Main-chain liquid-crystalline elastomers were examined to assess their long-term thermomechanical stability and elastocaloric performance under repeated uniaxial actuation. The monodomain samples, prepared with tunable crosslink densities and well – defined nematic – isotropic (N–I) transitions, wer ...

Leto: 2026 Vir: Institut Jožef Stefan (IJS)

Combining electrocaloric and magnetocaloric effects in single-phase multiferroics

Uroš Prah, Hana Uršič, Hana Uršič, Tadej Rojac, Brigita Rožič

Doktorska disertacija

Oznake: hladilni elementi v trdem stanju;tehnologija hlajenja;kalorični učinek;magnetokalorični učinek;feroelektrični materili;

Leto: 2020 Vir: Repozitorij samostojnih visokošolskih in višješolskih izobraževalnih organizacij

Topology-induced phenomena and caloric effects in condensed matter

Dejvid Črešnar, Zdravko Kutnjak, Brigita Rožič, Boštjan Zalar, Samo Kralj, Asta Gregorič

Doktorska disertacija

Oznake: stabilnost faz tekočih kristalov;vpliv površinsko funkcionaliziranih nanodelcev;fazni prehodi;izotropna faza;nematska faza;

Leto: 2023 Vir: Repozitorij samostojnih visokošolskih in višješolskih izobraževalnih organizacij

Improved thermal stability of dielectric properties and energy storage properties of lead-free relaxor Ba[sub]((1-x))La[sub]xTi[sub](0.89)Sn[sub](0.11)O[sub]3 ceramics

Said Khardazi, Nikola Novak, Zdravko Kutnjak, Brigita Rožič, Igor A. Luk'yanchuk

Izvirni znanstveni članek

Oznake: solid-state;perovskite structure;ferroelectrics;

Environmentally friendly perovskite ceramics Ba(1-x)LaxTi0.89Sn0.11O3 with x = 0, 0.015, 0.025, and 0.035 (BLTSnx) were synthesized by solid-state reaction method. The enhanced energy storage properties were studied across the ferroelectric relaxor conversion. The pure perovskite structure of all pr ...

Leto: 2025 Vir: Institut Jožef Stefan (IJS)

Numerical modelling and experimental validation of a regenerative electrocaloric cooler

Uroš Plaznik, Marko Vrabelj, Zdravko Kutnjak, Barbara Malič, Brigita Rožič, Alojz Poredoš, Andrej Kitanovski

Izvirni znanstveni članek

Oznake: cooling;refrigeration;energy efficiency;active caloric regeneration;

Numerical modelling and experimental validation of a regenerative electrocaloric cooler

Leto: 2019 Vir: Fakulteta za strojništvo (UL FS)

Ferroelectric KNbO[sub]3 nanoplatelets for thermally driven pyrocatalytic hydrogen evolution and dye degradation

Salma Touili, Bouchra Asbani, Youness Hadouch, Nejc Suban, Hana Uršič, Zdravko Kutnjak, Brigita Rožič, Mimoun El Marssi

Izvirni znanstveni članek

Oznake: pirokataliza;proizvodnja čiste energije;pyrocatalysis;nanoplatelets;clean energy production;dye degradation;

Day and night shift-induced thermal cycling offers a promising route toward free energy for green hydrogen production and dye degradation. Pyroelectric materials make this possible by converting temperature fluctuations into electrical charges that drive water splitting catalytic reactions and produ ...

Leto: 2026 Vir: Institut Jožef Stefan (IJS)

Pyroelectrically driven cold-hot energy harvesting for green hydrogen production of Ag-decorated Ba[sub](0.7)Sr[sub](0.3)TiO[sub](3) nanofibers

Youness Hadouch, Anna G. Razumnaya, Anja Pogačnik Krajnc, Maja Remškar, Nejc Suban, Hana Uršič, Brigita Rožič, Zdravko Kutnjak

Izvirni znanstveni članek

Oznake: pirokataliza;razvijanje vodika;nanovlakna iz barijevega stroncijevega titanata;srebrni nanodelci;piroelektrični materiali;zajemanje toplotne energije;pyrocatalysis;hydrogen evolution;Ba0.7Sr0.3TiO3 nanofibers;silver nanoparticles;pyroelectric materials;thermal energy harvesting;

Temperature fluctuations, ubiquitous in daily life, remain underexplored for hydrogen production. Here, we demonstrate hydrogen evolution by harvesting energy from cold–hot alternations between 293 and 323 K (20-50 °C) using pyroelectric Ba0.7Sr0.3TiO3 nanofibers (BST NFs) and Ag-decorated BST nanof ...

Leto: 2026 Vir: Institut Jožef Stefan (IJS)

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