防止砖混建筑顶层墙体温度裂缝的结构设计措施

对柳州地区混建筑顶层墙体常见温度裂缝进行了分析,提出了防止温度裂缝的结构设计措施。     

炭素阳极生产工艺标准化的研究

在炭素阳极生产过程中如何保证阳极质量稳定均一,减小各项指标波动一直是行业内的难题。本文从阳极生产结果、过程、检验、培训、检查考核5个方向论述如何建立炭素阳极生产工艺标准化体系,通过标准化体系建立、执行、优化达到阳极生产安全稳定、质量提升的目的。     

Industrial preparation and performance testing of property-modified prebaked carbon anodes for aluminum electrolysis

1　ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｉｓｗｅｌｌｋｎｏｗｎｔｈａｔａｌｕｍｉｎｕｍｅｌｅｃｔｒｏｌｙｓｉｓｉｓａ“ｌａｒｇｅｆａｍｉｌｙ”ｏｆｅｌｅｃｔｒｏｅｎｅｒｇｙｃｏｎｓｕｍｐｔｉｏｎ .Ｉｎｔｈｅｍｅａｎｔｉｍｅ ,ｃａｒｂｏｎａｎｏｄｅｓａｒｅｕｓｅｄｕｐｃｏｎｔｉｎｕｏｕｓｌｙｉｎｔｈｅｐｒｏｃｅｓｓｏｆｅｌｅｃｔｒｏｌｙｓｉｓ ,ｓｏｔｈｅａｌｕｍｉｎｕｍｅｌｅｃｔｒｏｌｙｓｉｓｉｓａｌ ｓｏｃａｌｌｅｄ“ｌａｒｇｅｆａｍｉｌｙ”ｏｆｃａｒｂｏｎｃｏｎｓｕｍｐｔｉｏｎ .Ｆｏｒａｌｏｎｇｔｉｍｅ…     

Pilot study of mechanism of property-modified anode in aluminum electrolysis

1　INTRODUCTIONAluminummetallurgyadoptsthemethodofhightemperaturemeltsaltelectrolysisdevelopedonehun dredyearsago .Intheprocessofresearchanddevel opmentinthisfield ,physicalchemistry ,electro chemistry ,materialscience ,roboticizedtechnologyandsoonwerecombinedwithaluminummetallurgytechniques,makingthebasicprincipleoftheHall Heroultprocessbeingmoredeeplyrealizedbypeople .Furthermore ,thistechnologywasdevelopedcon stantlyandbecamemoreandmoreperfectinordertofurthersaveenergy ,reducerawmateri…     

尿素均匀沉淀法制备超细α-Al2O3粉体

以Al2（SO4）3和CO（NH2）2为原料,通过均匀沉淀法制备出前驱物Al（OH）3,并煅烧得到超细α-Al2O3粉体。研究CO（NH2）2和Al2（SO4）3的摩尔比、Al2（SO4）3起始摩尔浓度、反应温度、反应时间等对前驱物制备的影响。利用X射线衍射仪、扫描电镜、热重/差示扫描法（DTA/TGA）等多种现代分析检测技术对粉体的性能进行了表征。结果表明：在CO（NH2）2和Al2（SO4）3的摩尔比为10：1、Al2（SO4）3起始浓度为0.05mol/L、反应温度为90℃、反应时间为60min的条件下,能得到分散性能良好、粒径为2μm左右且粒度分布均匀的球形超细α-Al2O3粉体。     

构建现物要约制度的设想

现物要约是传统要约的一个变体。为了保障交易安全和交易效率,保护当事人的合法权益,我国应该建立现物要约制度,并将其纳入合同法。对现物要约制度涉及的相对人的义务和权利等,提出规制的意见。     

Effects of drying method on preparation of nanometer α-Al2O3

Ammonium aluminum carbonate hydroxide （AACH） precursor was synthesized by the precipitation reaction of aluminum sulfate and ammonium carbonate. Then the precursor was dealt with five drying methods including ordinary drying, alcohol exchange, vacuum freeze-drying, glycol distillation, n-butanol azeotropic distillation respectively and calcined at 1 200℃ for 2 h to get α-Al2O3. The effects of drying methods on preparation of nanometer α-Al2O3 were discussed, and the optimal drying method was confirmed. The structural properties of powders were characterized by XRD, SEM and BET measurements. The results show that vacuum freeze-drying, glycol distillation and n-butanol azeotropic distillation can prevent the powders from aggregating, and among them the n-butanol azeotropic distillation is the best method. The nanometer α-Al2O3 powder with non-aggregation can be manufactured using n-butanol azeotropic distillation and the average particle size is about 40 nm.     

机械法制备铝电解用掺杂碳阳极

在原有的浸渍法掺杂碳阳极的基础上，全面考察了机械混合法掺杂碳阳极的掺杂剂制备和掺杂效果，并将其与浸渍法掺杂进行了比较，结果表明，机械混合掺杂法较浸渍法有明显的优势，但其电催化效果受到了一定的限制。     

锰基层状固溶体系正极材料的研究现状

Li2MnO3和LiMO2(M=Ni,Co)层状固溶体系正极材料首次放电容量可以达到220 mAh/g左右,循环稳定性好,50次循环后,仍能保持200mAh/g.介绍了材料的制备方法,总结了过渡金属在材料中的作用机理,包括其在结构上的特性及其对材料的电化学性能的影响.分析了目前材料的研究热点.