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巴西和英国学者共同研究了工业纯铌在烧结过程中晶粒长大的问题。他们用氢化脱氢(HDH)铌粉作原料,粉末平均粒度约10μm,BET(氮吸附)比表面积为0.61m2/g。主要杂质有:约0.62%(质量分数,下同)O2,0.038%N2,0.004%Fe,0.003%Al和0.003%的Si。铌粉在200MPa压力下冷等静压3min,压坯在1
Brazil and British scholars jointly studied the industrial pure niobium in the sintering process of grain growth problem. They use hydrogenated dehydrogenation (HDH) niobium powder as raw material, the average particle size of the powder is about 10μm, BET (nitrogen adsorption) specific surface area of 0.61m2 / g. The main impurities are: about 0.62% (mass fraction, the same below) O2, 0.038% N2, 0.004% Fe, 0.003% Al and 0.003% Si. Niobium powder at 200MPa pressure cold isostatic pressing 3min, compacts in 1