2000年以来白钨选矿技术的文献分析

应用＂中国知网＂数据平台,对2000—2013年发表的有关白钨技术文献进行检索,分析了白钨研究的文献发表趋势、期刊特征、关键词、研究机构和作者群体。同时,重点对白钨选矿专题文献进行了筛选和数据处理,分析了中国白钨选矿主要技术指标自2000年来的变化趋势,归纳整理出了资源回收率与精矿品位指标的文献分布图,根据样本数据统计,给出了中国白钨选矿的入选平均品位为0.48%,平均回收率为70.26%,选矿平均品位为54.17%。文献表明,尾矿中白钨资源回收和多金属矿中白钨资源的综合利用已成为近年来的研究热点。     

Synthesis and luminescence properties of BaWO4：Pr^3＋ microcrystal

BaWO4:Pr3+ (hereafter BWO:Pr) microcrystals were prepared via a hydrothermal route, and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), photoluminescence excitation and emission spectra. The as-prepared products with different morphologies of egg-shape rod, olive-like, and quasi-sphere were obtained by the addition of the surfactants and chelating agents. The emis-sion spectra of BWO:Pr microcrystals showed the strong red emission (642 nm) assigned to the Pr3+ ions of 3P0→3F2 transition with blue ex-citation (484.6 nm, 3H4→3P0).