该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......

现在很多纳米材料都具有发光特性,本文笔者以粒径大小均匀的双掺Yb3+、Tm3+的NaGd(WO4)2纳米晶体为例论述纳米材料发光的原理,分析......

摘 要：实验以水热法为主制备了分散性好，粒径大小均匀的双掺Yb3+、Tm3+的NaGd（WO4）2纳米晶。通过对纳米晶体本身的特性研究，及上转换发......

在不添加任何模板剂的情况下,采用温和水热法,制备了一系列NaGd0.96-x(WO4)2∶0.04Tb3+,xEu3+(x=0,0.005,0.01,0.02,0.04,0.06,0.0......

采用水热法制备了白光LED用NaGd0.95-x（WO4）2∶0.05Eu3＋,xBi3＋（x=0,0.02,0.04,0.06,0.08）和NaGd0.95-y（WO4）2∶0.05Eu3＋,ySm3＋（y=0,0.01,0.02,......

以聚乙二醇为络合剂,采用水热法成功制备了NaGd(WO4)2:Yb3+,Tm3+纳米粉。运用X射线粉末衍射、扫描电镜和光谱分析对制备的样品结构......