Application of In-situ Raman Spectroscopy on NaVO<sub>2</sub>F<sub>2</sub> Phase Transformation Study

ZHANG Sa; ZHENG Tengfei; HAN Longfei; YANG Cunxu

doi:10.11973/jxgccl202104005

Materials and Mechanical Engineering > 2021 > 45(4): 25-28. > DOI: 10.11973/jxgccl202104005

ZHANG Sa, ZHENG Tengfei, HAN Longfei, YANG Cunxu. Application of In-situ Raman Spectroscopy on NaVO₂F₂ Phase Transformation Study[J]. Materials and Mechanical Engineering, 2021, 45(4): 25-28. DOI: 10.11973/jxgccl202104005

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Application of In-situ Raman Spectroscopy on NaVO₂F₂ Phase Transformation Study

1. College of Materialsv;
2. Fujian Provincial Key Laboratory of Advanced Materials, Xiamen University, Xiamen 361005, China

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Received Date: May 13, 2020
Revised Date: February 25, 2021

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The NaVO₂F₂ compound was synthesized by hydrothermal method. The crystal structure of NaVO₂F₂ was analyzed by X-ray diffraction. In-situ Raman spectra of NaVO₂F₂ during the heating from 73 K to 573 K was obtained by Raman spectroscopy. The changes of characteristic peaks with temperature was analyzed and the phase transformation behavior was obtained. The results show that the obtained NaVO₂F₂ crystal was monoclinic at room temperature with space group P2₁/c. During the heating process, the low-temperature first-order phase transformation, transformation from low-temperature phase to P2₁/c phase and transformation from P2₁/c phase to P2₁/m phase occurred at the temperature point of 93, 233, 453 K, respectively. The results were in good agreement with those obtained by non-in-situ testing method, indicating that the in-situ Raman spectroscopy could be used to study the phase transformation behavior of NaVO₂F₂.
- NaVO₂F₂ single crystal,
- phase transformation,
- in-situ Raman spectra

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Application of In-situ Raman Spectroscopy on NaVO2F2 Phase Transformation Study

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Application of In-situ Raman Spectroscopy on NaVO₂F₂ Phase Transformation Study