中文摘要：

摘要高温固相法合成Li2Ca1-xSrxSiO4：Sm3＋发光材料。通过XRD、SEM和PL表征物质结构、形貌和发光性能。研究表明，在近紫外光激发下，Li2CaSiO4：Sma3＋、Li2SrSiO4：Sm3＋和Li2Ca1-xSr．Si04：Sma3＋（x=0．3～0．6）分别发出位于（563nm、607nm、649nm）、（559nm、599nm、645nm）和（563nm、599nm、645nm）的发射峰，其CIE位于红橙光区域。Sr2＋部分取代巳外后，Li2Ca1-xSkSiO4：Sm3＋（x=0．3～0．6）发射峰的位置不变，Sma3＋发光强度降低，其中Li2CA0.5Sr0.5SiO4：Sma3＋相对较高。加入4．5％Na2CO3电荷补偿剂后，Li2Ca5Sr0．5si04：Sma3＋发光强度提高了2．8倍，表明Li2Cao5Sr0.5SiO4：Sma3＋可作为LED用发光材料。

英文摘要：

The Sma＋-doped Li2Ca1 -xSrxSiO4 ： Sma＋ phosphor was prepared by a solid-state reaction method. The crystal structure, morphology and luminescent properties were discussed by XRD, SEM and PL measurements, respectively. The results suggested that under the NUV excitation, the emission spectra of Li2CaSiO4 ： Sm3＋ LieSrSiO4 ： Sm3＋ and Li2Ca1-xSrxSiO4 ： Sma＋ （x=0. 3-0.6） located at （563 nm, 607nm, 649 nm）, （559 nm, 599 nm, 646 nm） and （563 nm, 599nm, 645 nm） respectively, and the CIE sited in red-orange areas. The emission location of Sma＋ kept invariable but the emission intensity of Sma＋ decreased when Ca2＋ was replaced partly by Sr2＋. The luminous intensity of Li2 Ca0. 5 St0. 5SiO4 ：Sm3＋ was stronger than others and its luminescence intensity was improved 2. 8 times by adding 4. 5 5 Na2 COs as charge compensation agent. The research indicated that Li2 Ca0. 5 Sr0. 5 SiO4 ： Sma＋ phosphor could be a promising candidate for LED luminescent materials.