Systematic study on the quality of flux-grown Al2O3 single crystals for dosimetry applications

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Solid State Sciences Pub Date : 2025-02-01 Epub Date: 2025-01-17 DOI:10.1016/j.solidstatesciences.2025.107835

C. Rodrigues , J.G.M. Saraiva , A.P. Gonçalves , L. Peralta

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Abstract

Understanding the intricate effects of radiation at the microscale is pivotal for advancing cancer treatment strategies. This study focuses on the development of cutting-edge Al₂O₃-based passive dosimeters that are able to achieve microscale sensitivity and improve such description. Corundum (Al₂O₃) single crystals were grown isothermally with a Li₂O–MoO₃ flux system. Herein, we report the effects of flux composition, solute concentration, holding time and temperature on crystal quality, which directly impacts the detector's performance. Higher Li₂O concentration and higher holding temperature improved crystal transparency. Lower solute concentration led to larger crystals. Holding time did not appear to have a significant impact on crystal size or quality. Using a 15 % mol Li₂O – 85 % mol MoO₃ flux system with 6 % mol of Al₂O₃ and a holding temperature of 1180 °C, highly transparent Al₂O₃ single crystals up to 5 mm in size can be grown. The grown crystals show promising features for future radiation detection applications.

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通量生长Al2O3单晶质量的系统研究

在微观尺度上理解辐射的复杂影响对于推进癌症治疗策略至关重要。本研究的重点是开发尖端的基于al2o3的被动剂量计，该剂量计能够实现微尺度灵敏度并改进此类描述。采用li20 - moo3助熔剂体系等温生长刚玉（Al2O3）单晶。本文报道了助焊剂组成、溶质浓度、保温时间和温度对晶体质量的影响，这直接影响了探测器的性能。较高的Li2O浓度和较高的保温温度提高了晶体的透明度。溶质浓度越低，晶体越大。保温时间似乎对晶体尺寸和质量没有显著影响。使用15% mol Li2O - 85% mol MoO3助熔剂体系和6% mol Al2O3，在1180℃的保温温度下，可以生长出尺寸达5mm的高透明Al2O3单晶。生长的晶体在未来的辐射探测应用中显示出有希望的特性。

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.