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Synthesis-Microstructure-Performance Relations in Oxide Ceramic Scintillators

氧化物陶瓷闪烁体的合成-微观结构-性能关系

基本信息

批准号：
1207080
负责人：
Luiz Jacobsohn
金额：
$ 50.08万
依托单位：
Clemson University Research Foundation
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2012
资助国家：
美国
起止时间：
2012-06-15 至 2017-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1207080&HistoricalAwards=false
关键词：
Synthesis Microstructure Performance Relations Oxide

项目摘要

NON-TECHNICAL DESCRIPTION: Scintillators are unique materials that transform high energy ionizing radiation into detectable visible light. They are used for the detection and measurement of radiation in fields like security, energy, medical diagnosis, and science. Presently, there is a knowledge gap relating the fabrication and processing conditions of transparent ceramic scintillators with their scintillation output, a situation that undermines their performance and negatively impacts the widespread use of these materials. The innovative aspect of this project is to go beyond the fabrication of transparent ceramics to establish relations between fabrication conditions, microstructure, and defect characteristics with afterglow and scintillation performance. The broader impacts include the engagement of students in research activities, scientific events, and teaching; concomitant to broadening the participation of faculty from underrepresented Latino minority in institutions from the EPSCoR states SC and OK; and the dissemination of results.TECHNICAL DETAILS: It is hypothesized that the intensities of scintillation and afterglow are related to the concentration of structural imperfections that generate electronic traps, and that it is possible to mitigate afterglow by identifying suitable rare earth dopants to drain charge carriers off traps. The project aims at investigating the effect of grain boundary density and oxygen non-stoichiometry on the scintillation efficiency and afterglow intensity and duration, and at developing a predictive capability to identify suitable rare earth dopants to decrease afterglow intensity and duration. It focuses on rare earth doped Lu2O3, Y2O3, and Y3Al5O12 transparent ceramics, ultimately generating an understanding about how to fabricate ceramic scintillators with enhanced performance that can benefit the strategic areas and society in general.

非技术描述：闪烁体是一种独特的材料，可将高能电离辐射转化为可检测的可见光。它们用于安全、能源、医疗诊断和科学等领域的辐射检测和测量。目前，在透明陶瓷闪烁体的制造和加工条件与其闪烁输出之间存在知识差距，这种情况破坏了它们的性能并对这些材料的广泛使用产生负面影响。该项目的创新方面是超越透明陶瓷的制造，建立制造条件，微观结构和缺陷特性与余辉和闪烁性能之间的关系。更广泛的影响包括学生参与研究活动，科学活动，和教学;伴随着从代表性不足的拉丁裔少数民族在机构从EPSCoR州SC和OK扩大教师的参与;和结果的传播。假设闪烁和余辉的强度与产生电子陷阱的结构缺陷的浓度有关，并且可以通过确定合适的稀土掺杂剂以使电荷载流子从陷阱中排出来减轻余辉。该项目旨在调查晶界密度和氧的非化学计量对闪烁效率和余辉强度及持续时间的影响，并开发预测能力，以确定合适的稀土掺杂剂，以降低余辉强度和持续时间。它专注于稀土掺杂Lu 2 O3，Y2 O3和Y3 Al 5 O 12透明陶瓷，最终了解如何制造具有增强性能的陶瓷，从而使战略领域和社会受益。

项目成果

期刊论文数量（11）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Direct inkjet printing of miniaturized luminescent YAG:Er3+ from sol-gel precursor

利用溶胶-凝胶前驱体直接喷墨打印小型化发光 YAG:Er3

DOI：
发表时间：
2017
期刊：
Optical materials
影响因子：
3.9
作者：
Hong, Y.;Chen, Z.;Trofimov, A.A.;Lei, J.;Chen, J.;Yuan, L.;Zhu, W.;Xiao, H.;Xu, D.;Jacobsohn, L.G.
通讯作者：
Jacobsohn, L.G.

Luminescence and thermal lensing characterization of singly Eu3+ and Tm3+ doped Y2O3 transparent ceramics

单掺Eu3和Tm3 Y2O3透明陶瓷的发光和热透镜表征

DOI：
10.1016/j.jlumin.2015.01.003
发表时间：
2015
期刊：
Journal of Luminescence
影响因子：
3.6
作者：
Poma, P.Y.;Kumar, K. Upendra;Vermelho, M.V.D.;Serivalsatit, K.;Roberts, S.A.;Kucera, C.J.;Ballato, J.;Jacobsohn, L.G.;Jacinto, C.
通讯作者：
Jacinto, C.

Incorporation of Pr into LuAG ceramics