Mg-Sr牺牲阳极显微组织和电化学性能的研究

研究了Mg-Sr牺牲阳极的显微组织和电化学性能的特征.结果表明,Mg-Sr牺牲阳极的晶粒尺寸随Sr含量的增加而减小;当Sr质量分数为0.19%时,电流效率达到58.56%,开路电位达到-1.735 VSCE;Sr的质量分数再增加,Mg-Sr阳极的电流效率降低,开路电位正移.研究认为,Sr的质量分数为0.19%时,晶界析出的Mg17Sr2相（弱阴极相）和α-Mg基体（阳极相）组成电偶对,阻碍了阳极晶间腐蚀,减少了晶粒大块脱落, 且Sr能够和Mg、Fe形成弱阴极性化合物降低Fe的危害,电流效率升高,同时晶粒细化,晶界面积变大,杂质相分布更均匀,开路电位负移;Sr含量大于0.19%时,过量的Mg17Sr2相作为阴极相加大了阳极的自腐蚀,电流效率下降,开路电位正移.     

An electrochemical method for the preparation of Mg–Li alloys at low temperature molten salt system

Mg–Li alloys have been prepared by electrolysis in a molten salt electrolyte of 50% LiCl–50% KCl (mass%) at low temperature of 420–510 °C. The effects of electrolytic temperature and cathodic current density on alloy formation rate and current efficiency were studied. For the deposition of metallic lithium on the cathode consisting of solid Mg and liquid Mg–Li, both electrolytic temperature and cathodic current density have no obvious influence on current efficiency; while for the deposition of metallic lithium on the solid magnesium cathode, both electrolytic temperature and cathodic current density greatly affect alloy formation rate and current efficiency. The optimum electrolysis condition is—molten salt mixture, LiCl:KCl = 1:1 (mass%), electrolytic temperature: 480 °C, cathode current density: 1.13 A cm⁻². Mg–Li alloys with low lithium content (about 25 wt% Li) were prepared via electrolysis at low temperature following by thermal treatment at higher temperature.     

Ga2O3薄膜材料氧敏性能的研究

实验以三氯化镓为原料,柠檬酸为络合剂,通过NH3·H2O调节pH值,得到透明稳定的前躯体溶胶,红外光谱分析表明上述溶胶在向凝胶转变过程中,发生镓与柠檬酸的络合,并在干燥过程中依靠氢键形成大分子聚合物.采用提拉涂覆溶胶-凝胶法在多晶氧化铝基片表面形成凝胶膜后,经800℃下热处理,凝胶膜转化为单斜相β-氧化镓陶瓷薄膜.重复镀膜和热处理及超声清洗过程8个～10个周期,最后在800℃下烧结,保温1h,得到粒径为50nm～100nm左右的多孔纳米薄膜.采用自制系统检测β-Ga2O3薄膜的氧敏性能,结果表明Fe掺杂的氧化镓薄膜材料,在400℃～800℃范围内,在理论空燃比附近,电阻突变幅度大于2个数量级,具有较高的灵敏度.     

压铸模与铝合金金属间化合物的形成与分解

为了研究压铸模与铝合金金属间化合物的形成与分解过程,进行了热浸铝试验.试验结果表明金属间化合物的形成与分解是一个连续不断的循环过程,两者之间的相互关系导致了钢基的失重以及体积的减少.     

弧焊机器人焊接系统的研制与应用

本文介绍弧焊机器人焊接系统的研制及应用。该系统与示教再现型机器人配套,适于CO_2焊接。它采用高性能晶闸管式弧焊电源和推拉丝式送丝机,通过接口盒与机器人控制器通讯,能检测多种故障和报警。经反复试验和生产现场使用,证明该系统性能优良,工作可靠,焊接质量高,成本低,可实现国产化,替代进口产品。     

CdZnTe Crystal Growth by Vertical Gradient Freezing Method

ＣｄＺｎＴｅＣｒｙｓｔａｌＧｒｏｗｔｈｂｙＶｅｒｔｉｃａｌＧｒａｄｉｅｎｔＦｒｅｅｚｉｎｇＭｅｔｈｏｄＨｏｕＱｉｎｇｒｕｎ；ＷａｎｇＪｉｎｙｉ；ＤｅｎｇＪｉｎｃｈｅｎｇ；ＤｕＢｉｎｇ，（侯清润）（王金义）（邓金诚）（杜冰）；ＬｉＭｅｉｒｏｎｇａｎｄＣ...     

釉上金红颜料的研制

采用液相反应法研制了釉上金红颜料，给出了颜料和熔剂配方及其制备方法。     

正负离子表面活性剂相互作用的理论和实验研究

Typical cationic and anionic surfactants were chosen and their interactions were calculated by quantumchemical method. Interaction energies are -0.2378kJ·mol~(-1),-3.3394kJ·mol~(-1) and 0.1204kJ·mol~(-1) for the molec-ular pairs with fluocarbon and hydrocarbon chain: C_4H_(10)/C_5H_(12), C_4F_(10)/C_5H_(12), and C_4F_(10)/C_5F_(12), respectively.When hydrophilic group with cationic and anionicions is introduced, interaction energies are -287.40kJ·mol~(-1),-311.18kJ·mol~(-1) and -345.83kJ·mol~(-1). The results show that there is strong static interaction between cationicand anionic surfactants. It has been predicted that mixed monolayer may be formed and surface activity is en-hanced favorably, especially for mixtures of cationic and anionic surfactants with fluocarbon and hydrocarbonchains. The anionic surfactants, sodium octadecylbenzenesulfonate perfluopolyetherbenzenesulonate(ANF-Ⅰ)wassynthesized, mixture effects of ANF-Ⅰ with sodium octadecylbenzenesulfonate or dodecyldimethyl benzylammonium     

笨骈噻吩酮衍生物甲川型分散染料的研究(Ⅱ)染料分子结构与固色性能

本文对苯骈噻吩酮衍生物甲川型分散染料不同的结构品种,进行了热熔固色率测定;研究了染料分子结构与染料在涤纶上的固色性能,染料的溶解度参数与固色率的关系.     

微孔无机膜反应器研究

主要介绍了无机膜在化学反应中的应用－－膜反应器研究，对膜反应器的特点、类型、应用、影响因素以及与其它反应器的比较进行了评述，并对其应用前景进行了展望。