Effects of Zirconium Ions Doping on the Structural and Thermochromic Properties of VO2 Thin Films

Li, Yuanbao; Liu, Juncheng; Wang, Danping; Dang, Yuanyuan

doi:10.1007/s11664-017-5681-8

Cited by 11 publications

(5 citation statements)

References 30 publications

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“…The Zr-doped VO 2 films prepared by Zhang et al had the same tendency in cooling process [24]. However, Shen et al, Li et al and Lu et al have the opposite results with our experiment results [25,26,27]. They attributed the decreased of Tt to the changes of lattice structure.…”

Section: Resultscontrasting

confidence: 54%

“…Figure 1b shows a magnified view of the XRD peak corresponding to the (011) lattice plane. The peak shifted slightly towards the small angle, indicating that Zr doping had resulted in an expanded lattice [26,27]. The reason is that the doped Zr 4+ ions have a higher radius (0.072 nm) than the V 4+ ions (0.058 nm).…”

Section: Resultsmentioning

confidence: 99%

“…Shen et al reported that Zr doping could decrease the phase transition temperature and improve solar regulation rate simultaneously, the phase transition temperature decreased to 64.3 °C when the zirconium doping concentration was up to 9.8% [25]. Li et al synthesized VO 2 films with a sol-gel method and found that the effect of Zr 4+ doping decreased phase transition temperature by approximately 1 °C/at% on average [26]. Lu et al reported that the phase transition temperature (Tt) decreased with the increase of zirconium doping concentration, the Tt reduced to 50 °C when the zirconium doping concentration up to 2 wt% [27].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Zr Doping on the Magnetic and Phase Transition Properties of VO2 Powder

Wang

et al. 2019

Nanomaterials

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In this work, V1−xZrxO2 powder (x = 0, 0.01, 0.02, 0.04) was synthesized by two step hydrothermal method. The micro-topography, magnetic and phase transition properties have been investigated using various measurement techniques. All prepared V1−xZrxO2 powder samples exhibit monoclinic structure at room temperature. With the Zr4+ ions doping concentration increased, the shapes of VO2 particles change from spherical to rectangular slice. Besides, the saturation magnetic moment of the samples decrease with the increase of doped Zr4+ ions concentration, while their phase transition temperature increase gradually with Zr ions doping at a rate of around 2 °C/at% on average. We investigated the Zr doping effects on V-V dimers and confirmed the role of V-V dimers in phase transition. We speculate that more V-V dimers form with Zr doping by magnetic measurements, which result in the monoclinic phase of Zr-doped VO2 sample is more stable than rutile phase. Therefore the phase transition temperature is elevated by Zr doping in our experiment. We further consider that the VO2 phase transition should be ascribed to Peierls transition caused by the changing of V-V dimers.

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Section: Resultscontrasting

confidence: 54%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Zr Doping on the Magnetic and Phase Transition Properties of VO2 Powder

Wang

et al. 2019

Nanomaterials

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“…Upon cooling, exothermic processes are found at 60 and 59 °C for V and V-Zr2% respectively, also close to the literature values. The expected reduction in the transition temperature due to the addition of zirconium [ 40 ] is limited, which points to the fact that incorporation of zirconium in the crystal lattice of VO 2 is not substantial. A shoulder in the high-temperature side of the endothermic peak appears for both samples during heating and is a consequence of polydispersity [ 41 ].…”

Section: Resultsmentioning

confidence: 99%

In-Operando Diffraction and Spectroscopic Evaluation of Pure, Zr-, and Ce-Doped Vanadium Dioxide Thermochromic Films Derived via Glycolate Synthesis

et al. 2020

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Pure and doped vanadia (VO2, V0.98Zr0.02O2, V0.98Ce0.02O2) samples were prepared by wet chemistry synthesis from vanadyl glycolate intermediate phase and tape casted into films. Combining in-operando grazing incidence synchrotron X-ray diffraction and Raman spectroscopy, we studied the structural evolution of the films under isothermal conditions. The setup allowed assessment of the thermochromic functionality with continuous monitoring of the monoclinic to tetragonal transition in pure and doped vanadia phases, responsible for the transmission and reflection of light in the infrared part of the solar spectrum. The materials characterisation by X-ray diffraction beamline (MCX) goniometer demonstrated ideal performance, combining flexible geometry, high resolution, and the potential to accommodate the multi-channel equipment for in-operando characterisation. This method proved viable for evaluating the relevant structural and physical, and thereof functional properties of these systems. We revealed that dopants reduce the transition temperature by 5 °C on average. The synthetic route of the films was held responsible for the observed phase separation. The more favourable behaviour of cerium-doped sample was attributed to cerium alkoxide behaviour. In addition, structural, microstructural, thermal, and spectroscopic characterisation on powder samples was performed to gain more insight into the development of the phases that are responsible for thermochromic features in a broader range of doping ratios. The influence of the dopants on the extent of the thermochromic transition (transmission to reflection hysteresis) was also evaluated using (micro) structural, thermal and spectroscopic methods of powder samples. Characterisations showed that zirconium doping in 2, 4, and 6 mol% significantly influenced the phase composition and morphology of the precursor. Vanadium oxides other than VO2 can easily crystallise; however, a thermal treatment regime that allowed crystallisation of VO2 as a single phase was established.

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“…Thermochromic coatings and paints have many civil and military potential applications, including energy consumption and sunlight irradiation control in buildings and windows, thermometers and temperature sensors, laser marks, thermal warning signals, smart textiles and intelligent temperature control coatings, spacecraft thermal management, visibleinfrared smart stealth and adaptive camouflage technology [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. In recent decades, several thermochromic materials, including polymers, organic and inorganic materials, have been explored [2,3,5,7,[17][18][19][20]. Because of their limited thermal stability and detrimental effects on organisms, organic thermochromic chemicals are utilized at temperatures lower than 125 ºC.…”

Section: Introductionmentioning

confidence: 99%

Optical and thermochromic properties of yttrium iron garnet paint

2023

ijpr

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In this study, we have investigated the optical and high-temperature thermochromic properties of yttrium iron garnet powder and paint. The powders were produced using the solid-state reaction technique, and the thermochromic paint was sprayed over an Al alloy substrate. X-ray diffraction patterns, optical and field emission scanning electron microscopes, and UV-Vis and FTIR spectrophotometers were used to assess the structural, surface morphology and optical characteristics of the materials. The thermochromic characteristics of the samples were investigated by extracting the chromatic coordinates L*b*a* from digital pictures taken at temperatures ranging from 25 to 210 °C. The results reveal that when the temperature rises, the color of the paint changes from dark green to dark brown. The charge transfer between oxygen and iron ions, as well as the electron transition across the orbitals of the d layer, could be responsible for the observed reversible color change. The paint has strong thermal stability up to 350 °C which is suitable for hightemperature thermochromic applications.

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Effects of Zirconium Ions Doping on the Structural and Thermochromic Properties of VO2 Thin Films

Cited by 11 publications

References 30 publications

Effect of Zr Doping on the Magnetic and Phase Transition Properties of VO2 Powder

Effect of Zr Doping on the Magnetic and Phase Transition Properties of VO2 Powder

In-Operando Diffraction and Spectroscopic Evaluation of Pure, Zr-, and Ce-Doped Vanadium Dioxide Thermochromic Films Derived via Glycolate Synthesis

Optical and thermochromic properties of yttrium iron garnet paint

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