Microstructure and properties of Gd2O2S:Pr, Ce scintillation ceramics from powders synthesized at different precursor calcination temperatures

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Optical Materials Pub Date : 2025-02-19 DOI:10.1016/j.optmat.2025.116840

Dong Huang , Qiang Liu , Junlin Wu , Chen Hu , Warut Chewpraditkul , Weerapong Chewpraditkul , Jiang Li

{"title":"Microstructure and properties of Gd2O2S:Pr, Ce scintillation ceramics from powders synthesized at different precursor calcination temperatures","authors":"Dong Huang , Qiang Liu , Junlin Wu , Chen Hu , Warut Chewpraditkul , Weerapong Chewpraditkul , Jiang Li","doi":"10.1016/j.optmat.2025.116840","DOIUrl":null,"url":null,"abstract":"<div><div>The precursor with a stacked layered structure was synthesized in a hot water bath using oxide powders and concentrated sulfuric acid as raw materials. The precursor underwent air calcination at temperatures ranging from 400 to 700 °C for 3 h to yield the intermediate product. Gd2O2S:Pr,Ce powders were obtained by reduction at 700 °C for 3 h under a flowing hydrogen atmosphere. The effects of calcination temperature on the microstructure and phase transformation of powders were investigated. Using the synthesized powders as starting materials, Gd2O2S:Pr,Ce scintillation ceramics were successfully fabricated with high relative density (exceeding 98 % of the theoretical value). This process involved vacuum pre-sintering at 1350 °C for 3 h, followed by HIP post-treatment in an argon atmosphere at 1450 °C for 3 h. A strong green emission line at 511 nm, attributed to the 3P0→3H4 transition of Pr3+, was observed in the X-ray excited luminescence (XEL) spectra of all Gd2O2S:Pr,Ce ceramics. The Gd2O2S:Pr,Ce ceramics from powders synthesized at 500 °C showed the relatively higher optical transmittance and light yield (LY) value of 24,660 ph/MeV @ 662 keV γ rays. The photoluminescence (PL) decays of Pr3+ 3P0 → 3H4 transition were measured to be ∼2.90 μs for all Gd2O2S:Pr,Ce ceramics.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"162 ","pages":"Article 116840"},"PeriodicalIF":3.8000,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optical Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0925346725001995","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The precursor with a stacked layered structure was synthesized in a hot water bath using oxide powders and concentrated sulfuric acid as raw materials. The precursor underwent air calcination at temperatures ranging from 400 to 700 °C for 3 h to yield the intermediate product. Gd₂O₂S:Pr,Ce powders were obtained by reduction at 700 °C for 3 h under a flowing hydrogen atmosphere. The effects of calcination temperature on the microstructure and phase transformation of powders were investigated. Using the synthesized powders as starting materials, Gd₂O₂S:Pr,Ce scintillation ceramics were successfully fabricated with high relative density (exceeding 98 % of the theoretical value). This process involved vacuum pre-sintering at 1350 °C for 3 h, followed by HIP post-treatment in an argon atmosphere at 1450 °C for 3 h. A strong green emission line at 511 nm, attributed to the ³P₀→³H₄ transition of Pr³⁺, was observed in the X-ray excited luminescence (XEL) spectra of all Gd₂O₂S:Pr,Ce ceramics. The Gd₂O₂S:Pr,Ce ceramics from powders synthesized at 500 °C showed the relatively higher optical transmittance and light yield (LY) value of 24,660 ph/MeV @ 662 keV γ rays. The photoluminescence (PL) decays of Pr³⁺ ³P₀ → ³H₄ transition were measured to be ∼2.90 μs for all Gd₂O₂S:Pr,Ce ceramics.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

求助全文

约1分钟内获得全文去求助

来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.