刍议建筑工程施工的质量控制措施

目前,随着经济的发展以及人们生活水平的提高,建筑行业逐渐兴起,一定程度上引起了人们的广泛关注。为了能够更好地探讨建筑工程施工质量控制措施,本文从建筑施工质量问题特点出发,对施工质量控制措施进行了研究。     

用双标量位法计算铝电解槽的磁场

本文采用双标量位法计算铝电解槽的磁场。主要叙述了双标量位法的原理,推导双标量位法求解铝电解槽磁场的微分方程及交界面条件,并利用伽辽金法对微分方程进行离散。最后给出了用双标量位法求解铝电解槽磁场的程序框图。     

NiFe_2O_4基铝用惰性阳极的试制

在实验室中合成了镍铁尖晶石，以此为原料，采用冷压烧结的方法制成了Ni－Fe－Cu－O系铝用惰性阳极，并测定了这种阳极在470～970℃下的高温电阻率及其在970℃下铝电解质熔体中的抗腐蚀性，然后分别在微型石墨电解槽和石英透明电解槽中对这种阳极的铝电解电极行为进行了定性考察，证明了这种电极的实际应用前景．     

金属钛制备工艺研究进展

本文介绍了热还原法制备金属钛的工艺,包括Kroll法、镁还原低价卤化物、PRP法及Hunter法及电解法,包括电解TiCl4法、FFC剑桥工艺、EMR／MSE等,分析了各种方法的机理及特点。并且认为以TiCl4为原料制备钛工艺降低成本的空间很小;如能生产出低成本的TiCl4,钛成本高的问题将很快得以解决;从熔盐中直接电解TiO2制备金属钛,是低成本金属钛制备新工艺的发展方向。     

冰晶石基电解质熔体中SiO2的阴极还原

以钨丝为工作电极研究了冰晶石基电解质熔盐中ＳｉＯ＿２的阴极还原行为。根据循环伏安法与计时电位法的测定结果，硅在阴极的沉积机理为包含前置均相化学反应的４电子可逆传递过程。     

铝电解槽废旧阴极炭块中电解质与炭分离的浮选法研究

研究了捕收剂十二烷基苯磺酸钠、萘基羟肟酸、油酸和磺基水杨酸对铝电解槽废旧阴极炭块中电解质与炭的分离,并考察了上述四种捕收剂对纯冰晶石和氧化铝的浮选及氟离子对浮选的影响。结果表明,捕收剂十二烷基苯磺酸钠、萘基羟肟酸和油酸效果较好。浮选分离后可得到含炭仅5％的电解质,电解质的回收率可达90％以上。     

Preparation of AI-Ca Master Alloy by Electrolysis of Chloride-Fluoride Melts

Al-Ca master alloy was prepared in a labora-tory electrolysis cell.The operating parameters usedwere:temperature range 680-720℃,cathodic cur-rent density 0.76-1.10 A/cm~2,bath compositionin wt-% 75-85 CaCl_2+2-5 KCl+2-5 CaF_2.Un-der optimal conditions the current efficiencyreached 70-80% and the Ca-content 10-14 wt-%.     

CelluMOFs: Green,Facile, and Flexible Metal-Organic Frameworks for Versatile Applications

Natural cellulose fiber-based materials have been widely used in daily life for a broad application owing to their intrinsic merits such as easy availability, eco-friendly, good processability, and outstanding physical–mechanical properties. Surface modification of natural fibers with nanostructures is an effective strategy to integrate the textile substrates with many favorable functionalities. Here, a green, facile, and universal method is introduced for the in situ growth of γ-cyclodextrin (γ-CD) metal-organic frameworks (MOFs) in cellulose fiber-based materials (CelluMOFs). Compared to the pristine fibers, the resulting CelluMOFs have high porosity with up to 50 times larger specific surface area and enhanced loading capacity to functional molecules (essential oils, antibacterial agents, and active drugs) with 23–36 times higher loading content. The CelluMOFs also exhibit high adsorption capability to volatile organic compounds and carbon dioxide. Moreover, the CelluMOFs textiles loaded with a model drug (doxorubicin) show a steady release profile and deep skin permeation capability. These CelluMOFs combine the advantages of both cellulose fibers and CD-MOFs, which greatly extend their applications in the fragrance industry, antimicrobial, pollutant removal, and biomedical textiles.