排序方式: 共有36条查询结果,搜索用时 15 毫秒
31.
32.
In absorption cycles,ionic liquid(IL)1,3-dimethylimidazolium tetrafluoroborate([Dmim]BF4)may be a promising absorbent of working pair using water as refrigerant.The vapor pressures of[Dmim]BF4 aqueous solution were measured with the boiling-point method in the temperature range from 312.25 to 403.60 K and in the mass concentration range of 65%to 90%of[Dmim]BF4.The experimental data were correlated with an Antoine-type equation and the Non-Random Two-Liquid(NRTL)model,and the average absolute deviations between the experimental and calculated values were 1.06%and 1.15%,respectively.For the[Dmim]BF4 aqueous solution,the experimental vapor pressures show negative deviations from the calculated data with Raoult’s law.For higher mass concentration of the IL,the deviation is more negative.In addition,the vapor pressures,the hydrophilicity and the solubility of[Dmim]BF4 aqueous solutions were compared with those of[Dmim]Cl aqueous solutions and [Bmim]BF4 aqueous solutions at IL-mole fraction of 0.20. 相似文献
33.
在常规水溶液中合成了2种同多钒氧簇合物十钒酸盐[Na3(H2O)12][Ni(H2O)6]·[HV10O28](1)和[Na10(H2O)6][Co(H2O)6]·[VⅤ4VⅣ6O28](2).通过X射线单晶衍射对合成的化合物进行了表征.晶体结构分析表明:2种化合物均属单斜晶系,P2(1)群;化合物1晶胞参数a=0.902 04 nm,b=1.129 99 nm,c=1.175 15 nm,α=105.185 0°,β=97.327 0°,γ=100.838 0(10)°,V=1.114 15 nm3,Z=1;化合物2晶胞参数a=0.904 14 nm,b=1.130 84 nm,c=1.175 15 nm,α=105.18°,β=97.516 0°,γ=100.956 0(10)°,V=1.117 59 nm3,Z=1.并对2种化合物进行了磁性研究,表明磁性中心之间存在弱的反铁磁相互作用. 相似文献
34.
在分析海峡两岸高等职业院校开展产学合作的基础上,探讨了两岸高职院校开展科研合作,尤其是为企业服务的技术项目合作的可行性,指出两岸高职院校进行科研合作所应具备的必要条件,提出合作可采取的模式包括技术转移、委托研发、共同开发。 相似文献
35.
36.