用火焰碑子吸收法测定了包头铌精矿和冶金炉渣中氧化钙，选用盐酸介质同，镧作释放剂，用ＥＤＴＡ＋三乙醇胺消除了干扰。比较了酸溶及碱熔试样处理......

0．65Pb（Mg1／3Nb2／3）O3—0．35PbTiO3（简称：PMN-PT）弛豫铁电粉体采用两步无机盐-凝胶法制备。以氧化镁，醋酸铅，钛酸丁脂为原料，柠檬酸为螫合剂，乙......

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本文在研究苏州花岗岩中铌铁矿的基础上,首次在该地区发现了钽铁矿。电子探针分析表明它的Ta/(Ta+Nb)=0.50-0.73,Mn/(Mn+Fe)=0.20-......

通过原位高压拉曼光谱和x射线衍射对ZnNb2O6晶体在29GPa以下的结构转变进行了研究．拉曼光谱显示，多数拉曼峰强度减弱，且随着压力增加......

Niobium and tantalum are chemically similar and are associated with each other in nature which makes it very difficult t......

Millions of tons of tailing dump at Rayfield mine in Jos in North Central Plateau state of Nigeria have been found to co......

Determination of the work index of Gyel-Buruku columbite ore sample in Plateau state, Nigeria, was investigated. The sam......

This work reviews the geology, geochemistry and geochronology and discusses the spatial and temporal relationship of the......