Abstract
Traditional preparation of yttrium aluminum garnet (YAG) transparent ceramics involves the steps of powder preparation, green body formation and sintering. It is not only time-consuming, high energy consumption and high cost, but also has high requirements for equipment. Here, we developed a special interface reaction to prepare YAG transparent ceramic film. Transparent ceramic fluorescent film composed of YAG: Eu3+ was prepared by spin-coating the exfoliated layered rare earth hydroxide (LRH) nanosheets on the amorphous alumina substrate, followed by sintering at 1500 °C for 2 h in air. Al element tends to diffusion to the rare earth oxide side for the interface reaction, and more Al participates in the reaction at a higher temperature. The higher temperature makes more amorphous Al2O3 gradually participate in the interface reaction, and react with (Y0.95Eu0.05)2O3 to form mesophases of (Y0.95Eu0.05)4Al2O9 and (Y0.95Eu0.05)AlO3 at temperature lower than 1500 °C, and finally to form (Y0.95Eu0.05)3Al5O12 (YAG: Eu3+) at 1500 °C. The fluorescent film exhibited red emission at 618 nm, which is different from the orange red emission for YAG: Eu3+. The red emission at 150 °C maintained over 85% intensity of that at room temperature. We believe that the outcomes of this work may enrich the applications of the LRH nanosheets and may have wide implications to other compositional transparent ceramics.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
