Photochromic and light intensity modulation properties of Ca2SnO4∶Eu3+ceramics
The development of photochromic materials with good response to optical radiation and high stability is a major goal in the research of inorganic photochromic materials.In this study,rare earth ion Eu3+doped photochromic ceramics Ca2.02-xSnO4∶xEu3+were prepared by high temperature solid phase reaction method.The photochromic properties of ceramics were investigated,finding that the best coloring effect was achieved under 290 nm light,and the ceramics changed from white to gray.The color of the colored ceramics basically recov-ered after 8 min of 440 nm light,or the gray color completely disappeared after heating the colored ceramics to 623 K.Photoluminescence properties show that 395 nm,466 nm and 534 nm can excite red light emission domi-nated by 617 nm.The light intensity modulation properties of the ceramics were investigated,finding that 290 nm light irradiation could significantly reduce the intensity of the emission spectra of the ceramics,and there is a maximum coloring light intensity modulation rate of 86.9％at 617 nm.After ten cycles of coloring-bleaching experiments,the ceramic modulation properties remained stable and showed good reversibility.The photochro-mic behavior and light intensity modulation behavior of this ceramics show obvious characteristic UV wave-length response and UV light radiation accumulation response characteristics,indicating that this material is ex-pected to be applied in the field of optical radiation dose detection.
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