The research results can meet the requirements about qualitative analysis and semi-quantitative analysis of niobium in alloy. 讨论合金中铌(Nb)元素的定性和半定量分析方法,结果能满足材料牌号鉴别的需要。
The enrichment and recovery of tantalum and niobium through acid leaching and sodium alkali fusing from tungsten residue is studied. 研究了用酸浸与钠碱熔融法从钨渣中富集和回收钽铌(Nb)。
The leaching mechanism of niobium from a refractory niobium-tantalum ore by concentrated potassium hydroxide was studied. 实验研究了难分解铌(Nb)钽矿在高浓度氢氧化钾溶液中浸出过程的机理。
A black mineral that is an ore of niobium and tantalum. 一种黑色矿物,是铌(Nb)、钽矿石。