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- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국전기전자재료학회 Transactions on Electrical and Electronic Materials Transactions on Electrical and Electronic Materials 제24권 제1호
- 발행연도
- 2023.2
- 수록면
- 73 - 81 (9page)
- DOI
- https://doi.org/10.1007/s42341-022-00420-w
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This paper reports structural, optical, photoluminescence and thermoluminescence properties of scheelite-type CaWO 4 ceramic synthesized by solid-state reaction route. X-ray diffraction study revealed the structure of the sample with tetragonal phase and I4 1 /a (88) space group. Lattice parameters were calculated from the Rietveld refi nement method and the crystal structure was observed using VESTA software. Photoluminescence excitation spectra were obtained by using 450 nm and 460 nm emission wavelengths. The emission spectra obtained with 240 nm excitation wavelength showed an emission band around 448 nm that can be ascribed to 1 T 2 to 1 A 1 optical transition of electrons within [WO 4 ] 2- group. CIE Chromaticity indicated that CaWO 4 emits blue color and the color purity is also calculated. Optical band gap and urbach energy of the material were measured from the UV-visible spectroscopy. Thermoluminescence (TL) properties were investigated with different UV doses and the variations of TL emission peaks with temperature confirmed that CaWO 4 has second-order kinetics with lower UV dosimetry.
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