【摘要】 基于金属氧化物粉末在低温及适宜压力下的单分子吸附平衡 ,本工作以BET理论为依据 ,以氮气为吸附质 ,研究液氮温度下U3 O8粉末对N2 的吸附行为 ,测量因吸附引起的压力变化 ,采用定量气体体积标定单分子吸附表面积 ,确定工作曲线的斜率和截距 ,测定U3 O8粉末样品的比表面积。方法的精密度优于 11%。更多还原

【Abstract】 Based on the BET theory and the absorption behavior with a single molecular-form between metal oxide and N₂ at a favorable temperature, the specific area of U₃O₈ powder is determined. The variation of pressure due to the absorption was measured, and the slops and intercepts of the specification curve fitting are obtained by standardizing quantitative gas ball. Then the measured sample’s area with the single molecular-form is calculated according to the pressure variation and fitting parameters. The precision of this method can be better than 11%.更多还原