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We developed a pressureless sintering method to prepare GdAlO3: Mn (GAP: Mn) transparent ceramic films, which were prepared by spin coating layered rare earth hydroxide (LRH) on amorphous alumina substrate and sintering at 1550 oC for 2 hours. Through the interface reaction, the Al2O3 reacted with Gd2O3 to form mesophase Gd4Al2O9 below 1550oC. However, the final products are GdAlO3 at 1550 oC. The GAP: Mn4+ film exhibits a high transmittance of about 90%. Under UV excitation at 310 nm, the ceramic film outputs deep red and NIR emissions, which are both arising from the 2Eg-4A2g transition of Mn4+. Due to the electron traps arising from unequal valence substitution, the ceramic film exhibits a negative thermal quenching phenomenon. The ceramic film has a good luminescence thermal stability, because its emission intensity at 150 oC maintains over 72% that at room temperature. This work may pave a new way to fabricate transparent ceramics using layered rare earth hydroxides.

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• In Copyright
  

  This is the peer reviewed version of the following article: Pressureless sintering of LRH nanoplates on amorphous alumina for near-infrared GAP:Mn4+ transparent ceramic film, which has been published in final form at https://doi.org/10.1111/jace.18879. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

キーワード: GdAlO3, Interface reaction, Layered rare-earth hydroxide, Mn4+, Transparent ceramics

刊行年月日: 2022-11-25

出版者: Wiley

掲載誌:

• JOURNAL OF THE AMERICAN CERAMIC SOCIETY (ISSN: 00027820) vol. 106 issue. 3 p. 1870-1880

研究助成金:

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4342

公開URL: https://doi.org/10.1111/jace.18879

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更新時刻: 2024-01-15 15:11:08 +0900

MDRでの公開時刻: 2024-01-15 17:16:18 +0900