用热重法测量加热Gd_2O_3-UO_2烧结芯块,研究其吸湿性。实验结果证明:高密度、低开口孔隙率(≤0.2％)的Gd_2O_3UO_2芯块暴露在相对湿度为40％～90％空气中吸附的水是可以忽略不计的,并在室温真空条件下就很容易除去;具有特别高开口孔隙率(2％)的芯块中的吸附水可以通过线性升温至150℃保温1.5 h以上除去;而芯块中“茶壶状”或称 The Gd 2 O 3 -UO 2 sintered pellets were heated and measured by TG method to study the hygroscopicity. The experimental results show that Gd 2 O 3 UO 2 pellets with high density and low open porosity (≤0.2%) are negligible when exposed to air with relative humidity of 40% -90%, and are easily vacuumized at room temperature ; Adsorption water in pellets with a particularly high open porosity (2%) can be removed by a linear increase in temperature to 150 ° C for 1.5 h or more, while “teapot-like”