由土壤烧结成的红砖,因其耐高温、比热大,加之含有γ—Al_2O_3·Fe_2O_3和一定大小的空隙,将其碎成粉末后,可辅佐热分解实验及催化反应实验。一、硝酸的热分解在蒸发皿中加入1/5至1/4体积的红砖粉末,用酒精灯加热几分钟后,在粉末上滴入少许浓硝酸,可见红棕色气体冉冉上升。二、 The red brick sintered by the soil, due to its high temperature resistance and specific heat, combined with γ-Al_2O_3·Fe_2O_3 and voids of a certain size, can be crushed into powder, which can assist thermal decomposition experiments and catalytic reaction experiments. First, the thermal decomposition of nitric acid in the evaporating dish by adding 1/5 to 1/4 volume of red brick powder, heated with an alcohol lamp a few minutes, the powder on the drop of a little concentrated nitric acid, visible red-brown gas helium rose. two,