【摘要】 以Ｎａ２ＷＯ４为助熔剂，采用缓冷法成功地生长出新型发光晶体Ｎａ５Ｔｍ（ＷＯ４）４，晶粒尺寸为２ｍｍ×２ｍｍ×２ｍｍ。根据四方晶系面间距公式及最小二乘法，可以确定晶体的晶胞参数ａ＝１．１３８６ｎｍ，ｃ＝１．１２８３ｎｍ，测定并分析了该晶体室温下的红外光谱、吸收光谱、发射光谱及激发光谱。根据Ｊｕｄｄ－Ｏｆｅｌｔ理论计算了Ｔｍ３＋离子的吸收振子强度和配位场作用强度参数。结果表明该晶体有可能成为一类很重要的蓝色发光材料。更多还原

【Abstract】 The novel luminescence crystal,Na₅Tm （WO₄ ）₄, has been grown fromNa₂WO₄ melt.The single crystals as large as 2 mm × 2 mm × 2 mm were obtained.ACCotding tO formula of crystal planes space of the tetragonal system and calculation ofregtession analysis, the lattice parameters of Na₅Tm （WO₄）₄ crystal were measured. Theirvalues are a= 1. 1386 urn, c = 1. 1283 um,c/a = 0. 991. In this Paper, the aborption,fluorescence, excitation and infrared spectra of such crystal at room temperature weremeasured and analysed at the same time, according to Judd-Ofelt theory the intensityperarneters, oscillator strengths of Tin￣（3+）ion were measured. From these resultS it is notedthat the Na₅Tm （WO₄）₄ crystal is a important luminescence material at blue spectral range.更多还原