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Shimazaki, Kazunori; Tachikawa, Sumitaka; Ohnishi, Akira; Nagasaka, Yuji

doi:10.1023/a:1012813625195

Cited by 43 publications

(19 citation statements)

References 14 publications

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“…For example, the emissivity for x = 0.1 varies from 0.48 at 243 K to 0.69 at 343 K and has a sudden change in the vicinity of the transition temperature. The results were similar to those reported by Shimazaki et al [11] and Tang et al [7]. All of these studies show that the sudden change of emissivity in the vicinity of the transition temperature is attributed to metal-insulator transition properties on the basis of the double-exchange effect.…”

Section: Normal Emissivity Of Samplessupporting

confidence: 92%

“…Comparing with the classical Lorentz oscillator model, the factorized form is phenomenological and thus can be used to fit any excitation which contributes to the dielectric response. It is very useful in fitting infrared reflectances of perovskite-structure oxides [11,18,19]. The model has been successfully used to fit…”

Section: Spectral Reflectance and Optical Constantsmentioning

confidence: 99%

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Emissivity and Optical Properties of Thermochromic Material La0.7Ca0.3−x Sr x MnO3 (0 ≤ x ≤ 0.3)

Fan

Xuan

2011

Int J Thermophys

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La 0.7 Ca 0.3−x Sr x MnO 3 (0 ≤ x ≤ 0.3) (LCSMO) is a thermochromic material. The material can show a phase transition from ferromagnetic-metal to paramagnetic-insulator under the appropriate doping level (x). In this paper, LCSMO compounds were synthesized by a conventional solid-state reaction method. The normal emissivity and the spectral reflectance of LCSMO with different doping levels (x) are experimentally investigated. Based on the spectral reflectance data, the optical constants (refractive index n and extinction coefficient k) are calculated by using Kramers-Kronig (K-K) relations. Then, the emissivity changing mechanism is discussed. The experimental results show that the emissivity of LCSMO increases with increasing temperature. For the samples with x = 0.1 and 0.15, their emissivity has a sudden change in the vicinity of the phase transition temperature T p .

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Section: Normal Emissivity Of Samplessupporting

confidence: 92%

Section: Spectral Reflectance and Optical Constantsmentioning

confidence: 99%

Emissivity and Optical Properties of Thermochromic Material La0.7Ca0.3−x Sr x MnO3 (0 ≤ x ≤ 0.3)

Fan

Xuan

2011

Int J Thermophys

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“…2. However, the infrared reflectance in the 8-14 m waveband studied by Shimazaki et al increases with increasing doping level, indicating increasing mobility of free electrons, and the increased mobility of free electrons results in the decrease of ε N [15]. Moreover, LCMO has higher ε N values than LSMO.…”

Section: Methodsmentioning

confidence: 93%

“…In general, emissivity of metal is low, while that of insulator is high. Thus, due to MI phase transition properties, infrared emissivity changes significantly with temperature for appropriate doped manganese oxides, which make them attractive as thermal control material [15][16][17][18]. According to Kirchhoff law, emissivity relates to waveband and temperature.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of infrared emissivity of doped manganese oxides in different wavebands (3–5 and 8–14μm)

Shen¹,

Xu²,

Shao³

et al. 2009

Journal of Alloys and Compounds

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“…Variable-emissivity materials have received considerable attention due to their potential applications in thermal control devices of modern spacecraft [1], optical switching element [2] and smart window [3,4]. Perovskite-type La 1−x Sr x MnO 3 is a very interesting material that has been studied.…”

Section: Introductionmentioning

confidence: 99%