金属Al作还原剂的二价钐离子掺杂氟硅酸盐发光玻璃  

Divalent Sm Doped Fluorosilicate Glass with Metallic Al as A Reduced Agent

作　　者：王长建 乔旭升[1,2,3] 樊先平 邓人仁[1,2,3] WANG Changjian;QIAO Xusheng;FAN Xianping;DENG Renren(School of Materials Science and Engineering,Zhejiang University,Hangzhou310058,China;State Key Laboratory of Baiyun Obo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou 014030,Nei Mongol,China;Baotou Research Institute of Rare Earths,Baotou 014030,Nei Mongol,China)

机构地区：[1]浙江大学材料科学与工程学院,杭州310027 [2]包头稀土研究院白云鄂博稀土资源研究与综合利用全国重点实验室,内蒙古包头014010 [3]包头稀土研究院,内蒙古包头014010

出　　处：《硅酸盐学报》2025年第3期586-593,共8页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目(52372016)。

摘　　要：Sm^(2+)掺杂氟硅酸盐玻璃在光存储、信息加密等领域具有重要应用前景。然而,由于Sm^(3+)/Sm^(2+)还原电位较低,实现Sm^(2+)的高效还原仍是一个难题。为此,通过引入强还原性Al单质,在弱还原气氛下通过熔融-急冷工艺制备了Sm^(2+)掺杂氟硅酸盐玻璃。在Sm掺杂1%(摩尔分数)的条件下,随着原料中金属Al含量的增加,Sm^(2+)特征发射增加,而Sm^(3+)特征发射减弱。当金属Al的掺杂量达到0.60%(质量分数)时,Sm^(3+)特征发光峰完全消失。结果表明:玻璃熔制过程中,金属Al的掺入可以实现Sm^(3+)向Sm^(2+)的高效、稳定、可控转化。这为此类高效发光功能玻璃的发展提供了新的思路和途径。Introduction Sm^(2+)ion exhibits a broad absorption band in the ultraviolet-visible region due to its 5d state absorption,which can be tuned by crystal field effects and co-doping with other ions without causing self-absorption during 4f→4f emission transitions.Sm^(2+)ion also holds significant research interest in fields such as fluorescence lighting,photocatalysis,scintillation,temperature sensing,pressure sensing,and radiation dose monitoring.Fluorosilicate glasses doped with Sm^(2+)ions have promising applications in optical storage and information encryption.However,the efficient reduction of Sm^(3+)ion to Sm^(2+)ion remains a challenge due to the relatively low reduction potential of Sm^(3+)/Sm^(2+).This paper proposes a simple and cost-effective method for preparing Sm^(2+)-doped fluorosilicate glass in ambient air atmosphere.Methods The nominal base molar composition was 52SiO_(2)-16Al_(2)O_(3)-6AlF3-7.5BaF_(2)-18NaF-0.5Sm_(2)O_(3).Al particles were added to a raw material at different mass fractions(i.e.,0%,0.04%,0.08%,0.20%,0.60%,and 0.80%,respectively).25 g of analytical-grade raw material was mixed in required proportions and ground in an agate mortar for 15 min.The ground mixed material was placed in an alumina crucible covered with alumina and graphite plates and heated in a high-temperature elevator furnace in air at 1550℃for 30 min.Afterwards,the molten glass was poured onto a graphite plate and rapidly pressed flat using a stainless steel mold to form glass samples.These glass samples were labeled as G0,G0.04,G0.08,G0.20,G0.60,and G0.80,corresponding to the amount of elemental Al added in the raw materials.Finally,the glass samples were cut and polished to a thickness of 1 mm for the spectral measurements.To investigate the effect of annealing temperature on the stability of Sm^(2+)ion,the samples G0.04 and G0.60 were selected for heat-treatment at 440,460,480,500 and 520℃,respectively.We also investigated the effect Sm^(2+)doping concentration on the luminescence properties of glass sample

关 键 词：Sm2+掺杂氟硅酸盐玻璃 金属Al还原 Sm3+/Sm2+转换 近红外荧光 

分 类 号：O482.31[理学—固体物理] TQ127.2[理学—物理]