Qiangqiang Wen,Yuwei Ma,Fenglong Zhang,Han Sun,Weixiang Shang,Qiang Wang,Jinxiao Bao
Herein, we report a kind of structural and functional integrated ceramic material with excellent mechanical and optical properties . A series of Er-doped Zr 6 Nb 2 O 17 ceramic samples were prepared by the high-temperature solid-phase method, which showed reversible photochromism from light curry to dark brown under the alternating action of 365 nm UV light and heat treatment at 350 °C. The photochromic process is fully reversible and has good cyclic stability with a maximum photochromic contrast of 20.1%. The fluorescence modulation behavior based on the photochromic reaction can effectively modulate the emission of Er 3+ , and the maximum fluorescence modulation ratio reaches 62%. The best Vickers hardness and fracture toughness values of the prepared Zr 6 Nb 2 O 17 : Er ceramics reached 15.88 GPa and 4.5 MPa m 1/2 respectively. The mechanisms of the observed photochromism, photoluminescence , and fluorescence modulation were studied systematically. This work is expected to provide significant guidance for the development of high-performance colored ceramic materials and broaden its market application field.
Inorganic photochromic (PC) materials are increasingly recognized as promising candidates for anti-counterfeiting technologies and optical storage applications. To enhance their practical value, integrating superior mechanical properties can improve durability, ensuring stable performance over extended periods of use. In this study, we synthesized Zr6Nb2O17-based structural–functional integrated ceramics doped with rare earth ions (Sm3+, Eu3+, Dy3+, and Ho3+) using the high-temperature solid-state reaction method. By controlling the excitation energy of luminescent centers, we regulated the photochromic contrast and photoluminescence modulation ratio of the materials. The results showed that, upon irradiation with 365 nm UV light, all prepared ceramic samples exhibited a significant deepening in color. The photochromic contrasts of the four types of rare earth ion-doped Zr6Nb2O17 ceramics were 20.4% (Sm3+), 20.3% (Eu3+), 19.5% (Dy3+), and 20.0% (Ho3+), significantly higher than the undoped matrix's contrast of 12.4%. After heating at 350 °C, the colors of the ceramics were restored. Even after eight coloring–bleaching cycles, the color-changing performance remained stable, demonstrating excellent cycling stability and reversibility. Fluorescence modulation based on photochromic reactions effectively controlled the luminescence intensity of the rare earth ions, with luminescence modulation ratios of 39.7% (Sm2O3), 62.9% (Eu2O3), 61.2% (Dy2O3), and 41.3% (Ho2O3). The Vickers hardness values of different compositions ranged from 14.66 to 15.90 GPa, while the fracture toughness values ranged between 4.66 and 4.98 MPa m1/2. All ceramic materials exhibited excellent cycling stability, reversibility, and rapid photoresponse times, indicating significant potential for applications in optical information storage.
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