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NaCl-NaF-RE2O3体系的表面张力和密度 总被引:2,自引:0,他引:2
Surface tension and density of NaCl-NaF-RE_2O_3 melts have been measured by means of maximum buble pressure and Archimedes methods. The results are expressed by two mathematic models. Mass fraction of RE_2O_3 in the melts from 0.0 to 0.6% and that of NaF/NaCl, 50—90%. This investigation shows that there might be complexes in the melts. The information obtained can be used as a reference in the preparation of Al-RE alloys. 相似文献
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本文采用阿基米德法和扭摆坩埚法按照混料试验设计分别测定了NdF_3-LiF-BaF_2熔体的密度和粘度,获得密度、粘度与组成的数学表达式如下:ρ=11.325Z_1 13.478Z_z 11.694Z_3-8.081Z_1Z_2-4.980Z_1Z_3-0.392Z_2Z_3-7.331(g/cm~3),η=8.536Z_1 4.358Z_2 10.129Z_3-8.980Z_1Z_2-0.882Z_1Z_3 17.697Z_2Z_3-6.486(mPa·s)。Z_1为LiFwt%,Z_2=BaF_2wt%,Z_3=NdF_3wt%。 相似文献
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《中国稀土学报》2021,(2)
在运用熔盐电解法制备金属Ce的基础上,为了进一步优化电解过程的工艺参数,采用阿基米德法对LiF-CeF_3-CeO_2熔盐体系密度进行了研究,考察了温度、 CeO_2加入量、熔盐中CeF_3的含量对熔盐体系密度的影响。结果表明:在LiF-CeF_3熔盐体系中,当CeF_3和CeO_2的含量一定时,密度随着温度的升高而降低,其密度范围在3.1~3.6 g·cm~(-3)之间;在温度和CeF_3加入量一定时,LiF-CeF_3-CeO_2熔盐的密度随着CeO_2加入量的增加而增大,并且每增加1%CeO_2,熔盐密度升高约0.022 g·cm~(-3);在CeO_2加入量和温度一定时,添加CeF_3质量百分含量越高,体系熔盐密度越大。 相似文献
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用最大气泡压力法连续测定了氯化钇-氯化钾体系在1048~1248K下的表面张力和密度。表面张力随温度的升高而减小。在约60mol%氯化钇处与用Guggenheim方程计算的理论值比较出现最大的负偏差。熔盐的表面张力γ(mN/m)与氯化钇的摩尔分数x和温度T(K)的关系式为:γ=176.93-49.89x-3.16x~2+15.33x~3-(0.074-0.022x)T。本试验得到的密度值与用阿基米德法得到的数值很接近。根据表面张力和密度的数据分析,在氯化钇-氯化钾熔体中可能形成钇氯络离子。 相似文献
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采用气泡最大压力法测定了等摩尔NaCl-KCl系添加10%,20%,30%及40%ScCl3熔盐体系的密度及表面张力。结果表明,当ScCl3含量相同时,熔体密度及表面张力随着温产加而降低。 相似文献
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R. H. Ottewill A. B. Schofield J. A. Waters 《Journal of Dispersion Science and Technology》2013,34(6-7):1151-1162
The thermodynamic conditions for the engulfment of one set of particles by another has been given in terms of interfacial energies. Experimentally, it has been shown that a polymer with a high glass transition temperature can be engulfed by a particle of low glass transition temperature; also, that Inorganic particles can be engulfed by polymer particles. As a precursor to the engulfment stage heterocoagulation can be used for bringing the particles together in a ‘sticking’ mode. This appears to be a general process which is applicable to a number of scientific areas, e.g. in biology, phagocytosis, and in material science for the preparation of composite particles. 相似文献
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J. M. Vega Pérez C. Gómez Herrera F. J. Ruiz Rodriguez M. B. Riego Martín 《Journal of Dispersion Science and Technology》2013,34(3):259-269
The synthesis and identification of this product are described. Variations of surface tension of its aqueous solutions versus concentration (ranged between 3 and 95 mmol/L) and temperature (ranged between 20.0 and 47.5°C) are studied. The isothermal plots of surface tension versus the logarithm of the concentration show a continous decrease, with a sharp change of slope at a concentration about 6.5 mmol/L, for all the studied temperatures. A second change of slope, less pronounced, appears for a higher concentration. This concentration value increases from 28 to 42 mmol/L when temperature is raised from 20.0 to 47.5°C. The changes of slope can be attributed mainly to micellization of neutral amine molecules resulting from hydrolysis of surface active cations, which present a weak electrolytic character. 相似文献
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我们曾测定NdCl_3·4THF的晶体结构,并研究了它对双烯烃聚合的活化作用.本文报导含二甲氧基乙烷(Dimethoxyethane,简称DME)的SmCl_3(DME)·2THF的制备及其单晶结构,以利于对稀土催化双烯烃聚合反应机理作出更好的解释. 相似文献
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甲基丙烯酸3-磺酸丙酯钾盐苯乙烯共聚物负离子与N,N,N-三甲基十六烷基溴化铵相互作用研究 总被引:2,自引:0,他引:2
聚电解质与表面活性剂相互作用研究已有很多报道[1~4],由于在很多方面与生物膜中脂质体-蛋白质间相互作用相似,从而近年来备受关注[5~6].作为带电荷的水溶性高分子,聚电解质与带相反电荷的表面活性剂分子可以形成规整性非常好的聚电解质表面活性剂复合物.Antoniettti等报道聚丙烯酸与十六烷基三甲基溴化铵(CTAB)形成规整的介规相(Mesophase)聚电解质表面活性剂复合物结构[7],漆宗能等在同一体系既观察到了热致液晶也观察到了溶致液晶[8].在研究甲基丙烯酸3磺酸丙酯钾盐(SPMS)的苯乙烯(St)共聚物(P(SPM… 相似文献