1.The result shows that the calcined LDH has an excellent performance in adsorbing bromide anion,the adsorption capacity is 133.33mg/g at 35℃ and in accordance with the Langmuir isotherm.
实验结果表明,焙烧层状
氢氧化镁铝对溴离子具有较好的吸附性能,35℃下饱和吸附量为133.33mg/g,其吸附等温线可以用Langmuir等温方程描述。
2.The results show that: the fillers of SiO2 based investment consist of SiO2, Al2O3 and MgO, and the binder is NH4H2PO4 for SiO2 based investment, the bulk density and the compression strength decrease, the apparent porosity and the thermal expansion increase, when the specimens are heated to 900℃; the fillers of Al2O3 based investment consist of Al2O3 and MgO, and the binder is NH4H2PO4; for Al2O3 based investment, the bulk density decreases and the apparent porosity increases when the specimens are heated to 900℃; the fillers of MgO based investment consist of MgO and Al2O3, and the binder is CA cement; for MgO based investment, the compression strength decreases and the thermal expansion increases greatly when the specimens are heated to 900℃.
结果表明：
氧化硅系包埋料的骨料是
氧化硅、
氧化铝、
氧化镁，结合剂为磷酸二
氢铵，其900℃锻烧后显气孔率增加，体积密度下降，耐压强度降低，热膨胀增大；
氧化铝系包埋料的骨料是
氧化铝和
氧化镁，结合剂为磷酸二
氢铵，其900℃烧后显气孔率增加，体积密度下降，热膨胀变化不大；
氧化镁系包埋料的骨料是
氧化镁和
氧化铝，结合剂是
铝酸钙水泥，其900℃烧后耐压强度明显降低，热膨胀明显增大。
