Effects of Ca2+-Sr2+ doping on the infrared emissivity of LaCrO3
Source abstract
Abstract
Abstract LaCrO3 shows excellent thermal stability and good emissivity, and can be used as a potential thermal protection material for hypersonic vehicle. In this study, LaCrO3 and Ca2+-Sr2+ doped LaCrO3 were prepared by solid state reaction at 1400 °C for 2 h. The microstructures of the samples and effects of Ca2+-Sr2+ doping on the infrared emissivity of LaCrO3 were studied by XRD, XPS, FT-IR, and UV–VIS–NIR spectrophotometer. The results show that after doping Ca2+ and Sr2+ ions, the infrared emissivity of all samples has significantly improved at 2.5–10 μm, from 0.61 (minimum value) to above 0.90. In the range of 10–14 μm, the emissivity of pure LaCrO3 and La0.8CaxSr0.2-xCrO3 samples shows a similar trend and all remains above 0.97. Therefore, doping Ca2+ and Sr2+ can significantly increase the emissivity of LaCrO3 at 2.5–10 μm, which makes it have a wider application prospect in the field of high temperature thermal protection.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Transition Metal Oxide Nanomaterials · Optical properties and cooling technologies in crystalline materials · Luminescence Properties of Advanced Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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