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首页> 外文期刊>RSC Advances >Tuning the composition of rare earth sesquioxides Gd2-xLaxO3:Eu3+ to control phase transitions at a high temperature to design new highly sensitive luminescence-based thermal sensors
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Tuning the composition of rare earth sesquioxides Gd2-xLaxO3:Eu3+ to control phase transitions at a high temperature to design new highly sensitive luminescence-based thermal sensors

机译：调整稀土化的组成Gd2-Xlaxo3：Eu3 +以控制高温控制相变，以设计新的高敏感发光的热传感器

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摘要

The C-form (SG: Ia (3) over bar) -> B-form (SG: C2/m) phase transition of RE2O3 rare earth sesquioxides is described for the first time for face centred cubic-hexagonal close-packed array transformations. Based on XRD data analysis, the temperature of the C -> B phase transition in Gd2-xLaxO3 compositions (0 < x < 0.5) was controlled by adjusting the Gd/La atomic ratio and varies between 1100 degrees C and 1400 degrees C. Taking into account the various environments of rare earth oxides in C and B allotropic forms, Eu3+ was used as a local probe to obtain photoluminescence spectra (emission and excitation spectra, luminescence decay time curves). The spectra significantly changed during the phase transition, which occurred within a small temperature range. Furthermore, coupling Rietveld XRD data analysis for the long-range order signature with optical emission spectroscopy to probe the local environment provides a clear view of the C -> B phase transition, allowing for the design of new highly sensitive thermal sensors at high temperatures.
机译：C形式（SG：IA（3）上方） - > B形（SG：C2 / M）Re2O3稀土级氧化物的相转变，首次用于面对中心立方 - 六边形紧密堆积阵列变换。基于XRD数据分析，通过调节Gd / La原子比来控制GD2-Xlaxo3组合物中的C - > B相转变的温度，并在1100℃和1400摄氏度之间变化考虑到C和B同种异体形式中的稀土氧化物的各种环境，EU3 +被用作局部探针，得到光致发光光谱（发射和激发光谱，发光衰减时间曲线）。在相变期间，光谱显着改变，在较小的温度范围内发生。此外，使用光发射光谱对远程顺序签名的RietVeld XRD数据分析探测到局部环境提供C - > B相转变的清晰视图，允许在高温下设计新的高敏感热传感器。

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