EFFECT OF OXYGEN CONTENTS ON OXYGEN POTENTIALS OF H_2O-H_2 AND H_2O-H_2-INERTS GAS MIXTURES

考虑到氧的影响,本文导出一组H_2O-H_2及H_2O-H_2-惰气混合气体氧位新的表征式。经典表征式是该公式的特例。本文讨论了微量氧存在时对平衡气氛影响的各种因素以及减小误差的最佳配气条件,同时评价了某些用H_2O-H_2(或H_2O-H_2-惰气)混合气体控制氧位的平衡实验的可靠程度。     

EFFECT OF OXYGEN CONTENTS ON OXYGEN POTENTIALS OF H_2O-H_2 AND H_2O-H_2-INERTS GAS MIXTURES

By taking the effect of oxygen contents into account,a new set of formulae which representsthe oxygen potentials of H_2O-H_2 and H_2O-H_2-inerts gas mixtures has been derived.Classi-cal representation is only a particular case of it.Some of the variables affecting equilibriumatmosphere when trace oxygen is present and optimum preparation of the gas mixtures to min-imize errors have been discussed.The reliability of some of previous equilibrium experimentsunder the oxygen potentials controlled by H_2O-H_2 or H_2O-H_2-inerts gas mixtures has alsobeen criticized.     

氧对Mo2FeB2金属陶瓷性能的影响

考察了氧对Ｍｏ２ＦｅＢ２金属陶瓷性能的影响。结果表明：基体中的氧能与硼形成表观像玻璃的Ｂ２Ｏ３杂质，烧结时这些Ｂ２Ｏ３杂质能从基体内迁移到基体表面，而在基体内部留下了大量孔洞，恶化了基体性能。通过适当的工艺措施，减少Ｂ２Ｏ３杂质的形成，可制得较好综合性能的Ｍｏ２ＦｅＢ２金属陶瓷     

Na2O—Ga2O3系相平衡研究

用示差热分析（ＤＴＡ）和Ｘ射线衍射（ＸＲＤ）方法测定Ｎａ２Ｏ－Ｇａ２Ｏ３（≥５０ｍｏｌ％Ｇａ２Ｏ３系相平衡图。结果表明，该二元系中有Ｎａ２Ｏ·Ｇａ２Ｏ３，２Ｎａ２Ｏ·３Ｇａ２Ｏ３，Ｎａ２Ｏ·３Ｇａ２Ｏ３和Ｎａ２Ｏ·５Ｇａ２Ｏ３四个中间化合物。２Ｎａ２Ｏ·３Ｇａ２Ｏ３在温度高于９７６±８℃时分解为Ｎａ２Ｏ·Ｇａ２Ｏ３和Ｎａ２Ｏ·３Ｇａ２Ｏ３·Ｎａ２Ｏ·Ｇａ２Ｏ３，Ｎａ２Ｏ·３Ｇａ２Ｏ３和Ｎａ２Ｏ·５     

EFFECTS OF Y2O3 AND CeO2 ON PROCESSING AND CHARACTERISTICS OF TUNGSTEN ELECTRODES

１ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｒｅｃｅｎｔｙｅａｒｓ,ｔｕｎｇｓｔｅｎｅｌｅｃｔｒｏｄｅｍａｔｅｒｉａｌｓｃｏｎｔａｉｎｉｎｇｏｎｅｋｉｎｄｏｆｒａｒｅｅａｒｔｈｍｅｔａｌｏｘｉｄｅａｓＬａ２Ｏ３,ＣｅＯ２ａｎｄＹ２Ｏ３,ｈａｖｅｂｅｅｎｄｅｖｅｌ...     

TiO2薄膜的光电效应在金属防腐蚀中的应用

TiO2涂层的光电化学防腐蚀性能的研究还处于初期,主要是理论探索方面的研究.本文简述了目前所认识的TiO2防腐蚀机理,以及TiO2涂层用于铜、不锈钢、碳钢上的研究现状.      

Nb_2O_5-MnO-SiO_2渣中Nb_2O_5和MnO活度的研究SCIEI

本文利用含NbFe液与Nb_2O_5-MnO-SiO_2渣之间平衡,在1828K温度下应用固体电解质浓差电池方法测定了Fe液中氧的活度,从而计算出渣中Nb_2O_5及MnO的活度,并绘制了Nb_2O_5-MnO-SiO_2三元系的等α_(Nb_2O_5)和等α_(MnO)图。     

添加TiO2组元的纳米级三元钛阳极涂层的组织形貌

通过溶-胶凝胶(sol-gel)制备了添加TiO2的RuO2+TiO2/Ti纳米涂层钛阳极,并通过XRD,DTA,TEM分析了TiO2组元对RuO2+TiO2+SnO2/Ti的电极涂层的组织、晶粒尺寸和外观形貌的影响,结果表明,所获涂层为纳米级结构,添加TiO2细化晶粒的效果不显著.研究表明,涂层组成物主要为(Ru,Sn,Ti)O2固溶体,TiO2含量增加,该固溶体仍能稳定存在.退火温度升高后,发生单质Ru的析出,TiO2组元不能阻止涂层析出Ru单质.添加TiO2的涂层晶粒外观成等轴状特征.     

PHASE DIAGRAM OF TERNARY SYSTEM PrCl_2-CaCl_2-MgCl_2

Three surfaces corresponding to the primary crystallization of PrCl_3,CaCl_2 andMgCl_2 respectively,3 univariant curves related to the secondary crystallization and a ternaryeutectic(44.8 wt-% PrCl_3,31.8 wt-% CaCl_2,546℃)were found in systemPrCl_3-CaCl_2-MgCl_2 by means of DTA.A reaction occurs in this system:L=PrCl_3+CaCl_2+MgCl_2.     

CALCULATION OF NaCl-BaCl_2-SrCl_2 PHASE DIAGRAM

The mathematical formulas are given for calculating the partial molar thermodynamic proper-ties in a ternary system from its three corresponding binary systems based on the new ternarysymmetric model presented by the authors in the foregoing paper.Applying this model toNaCl-BaCl_2-SrCl_2 system,the phase diagram of which as well as some isothermal sectionshave been calculated.The devations of temperature between the calculated and experimen-tal diagrams are less than five degrees.     

H2S分压对油管钢CO2/H2S腐蚀的影响

1974-）,男,硕士研究生,研究方向为腐蚀与防护.〖ZK)〗 Tel：0379-4231846〓E-mail：FQ)〗〖HT〗〖HJ〗〖HT5”SS〗 〖JZ(〗〖HT2H〗〖STHZ〗〖WTHZ〗 采用高温高压釜,辅以失重法和扫描电镜,对不同H2S分压下(1.4 kPa,20 kPa,60 kPa,120 kPa)油管钢N80、P110的CO2/H2S腐蚀进行了研究.结果表明,在试验H2S分压范围内,随着H2S分压的升高,两种钢的腐蚀速率先增后降,且都在H2S分压为20 kPa时取得最大值.      

KINETICS OF REACTION BETWEEN Cu_2S AND Cu_2O

Reaction between Cu_2S and Cu_2O was investigated at 1150 to 1250℃.The reaction rate in-creases with the increase of surface area of Cu_2O grains and depends unobviously on temper-ature.At the suggestion of controlling step of reaction rate being oxygen diffusion through theliquid layer along reaction boundaries,two final kinetical equations would be made as follows:x=6.69×10~(-2)At for 0<α<0.74 and ln(l-α)=-A(9.83×10~(-2)t+1.76)for 0.74<α<1,whereα is SO_2 evolved in time t and A is surface area of Cu_2O particles.     

PrCl3—CaCl2—MgCl2三元体系相图的研究

本文借助于DTA研究了PrCl_3-CaCl_2-MgCl_2三元体系相图发现:本体系属简单低共熔型相图。体系内有对应于PrCl_3,CaCl_2和MgCl_2的三个液相面,三条二次结晶线和一个三元低共熔点E(44.8wt-％PrCl_3,31.8wt-％CaCl_2,546℃)。     

LiF－CaF_2，NaF－CaF_2和KF－CaF_2系熔体热力学参量及相图的计算

本文将ＤＣＡ模型应用于ＬｉＦ－ＣａＦ２，ＮａＦ－ＣａＦ２和ＫＦ－ＣａＦ２熔体，并假设在这些熔体中存在络合离子．利用已有的上述混合熔体量热和熔盐相图的实验数据估计了熔体模型中的参数，并计算了熔体的混合热力学参量及相图．计算结果与实验结果吻合较好．     

Ca2SiO4和NaFeO2的反应和铝酸盐熟料配方的优化

用X射线衍射(XRD)和红外吸收光谱(IRS)研究了Ca_2SiO_4—NaFeO_2系的反应产物,证明其中含CaFe_2O_4和Na_4Ca_8(SiO_4)_5。热力学计算表明Ca_2SiO_4-NaFeO_2不是互易系的稳定对Na_4Ca_8(SiO_4)_5和铝酸钠溶液作用生成Ca_3[Al(OH)_6]_2(或其固溶体),使熟料Al_2O_3溶出率降低。用模式识别方法从工业生产技术记录中总结出熟料配方优化数学模型,并给出理论解释。     

SmCl3—PbCl2和SmCl3—PbCl2—CaCl2系相图的研究

利用DTA和X射线衍射技术研究了SmCl_3-PbCl_2二元系和SmCl_3-PbCl_2-CaCl_2三元系相图。发现SmCl_3-PbCl_2系有一个异份熔化化合物3SmCl_3 PbCl_2,体系转熔点p为465℃,42.0mol-%SmCl_3,低共熔点e是452℃,33.0mol-%SmCl_3,SmCl_3-PbCl_2-CaCl_2三元系有对应SmCl_3,PbCl_2,CaCl_2,和3SmCl_3·PbCl_2四个液相面,五条二次结晶线,一个三元低共熔点E[396℃,29.5mol-%SmCl_3,58.0mol-%PbCl_2],一个三元转熔点P[417℃,36.0mol-%SmCl_3,50.0mol-%PbCl_2),对应的两个四相平衡反应为: L=PbCl_2+CaCl_2+3SmCl_3·PbCl_2 L+SmCl_3=3SmCl_3·PbCl_2+CaCl_2     

Bi2O3与Sb2O3掺杂对ZnO力学性能的影响

设计、制备了三个系列(不同Bi2O3与Sb2O3掺杂浓度)的ZnO基复合材料.力学性能测试的结果表明,Bi含量(2%,原子分数)保持不变,随Sb含量(在合适的剂量范围内)的增大,由于基质ZnO晶粒减小,陶瓷致密度增大,所得材料的模量、抗弯强度以及断裂韧性均增大;Sb含量(3%,原子分数)保持不变,随Bi含量的增大,由于基质ZnO晶粒增大、陶瓷致密度减小,所得材料的模量、抗弯强度以及断裂韧性均减小.在设计组成范围内材料的最佳力学性能约为:弹性模量114 GPa,弯曲模量115GPa,抗弯强度 120 MPa,断裂韧性1.87 MPa·m1/2.     

卤离子溶液中(NH2)2CS对Cu阳极溶解的缓蚀作用

运用恒电位稳态极化和暂态极化技术研究了(NH2) 2CS在中性NaF、NaCl、NaBr及KI溶液中对金属Cu阳极溶解的缓蚀作用.通过比较Cu在卤离 子溶液与含(NH2)2CS卤离子溶液中的电化学行为,解释了(NH2)2CS的缓蚀机制；并 研究了扫描速率对形成CuX膜的峰电位和峰电流的影响,探讨了Cu的阳极溶解机理.     

Zn─Fe合金镀层耐蚀性能研究

利用X-射线衍射和扫描电镜技术研究了纯Zn和Zn-Fe合金(含Fe0.2～0.7wt%)镀层的结构,发现Zn-Fe合金镀层的晶粒较纯Zn镀层细小,晶体排布更为致密;利用电化学综合测试仪研究了纯Zn和Zn-Fe合金镀层的极化电阻和腐蚀电流,结果表明Zn-Fe合金镀层的极化电阻更高而腐蚀电流较纯Zn镀层显著减小。     

EFFECT OF SnO_2 ADDITION ON THE SERVICE LIFE AND ELECTROCHEMICAL PROPERTIES OF Ti/IrO_2,+Ta_2O_5 ANODES IN PHENOLSULFONIC ACID SOLUTION

1. IntroductionSince the discovery more than 30 years ago[1] t Ti based oxide anodes with various mixtures have been applied in different electrochemical fields. Amollg that, RllOZ TiOZ hasbeen successfully used in chlor-alkali indllstry[2] 9 and Ti/IrOZ TaZOS allode was generallyverified as the best binary mixture for oxygen evolution in acid media due to its goodelectrocatalytic activity and high durability[3--5]. However, in an extreme electrolyte, thesuitability of this anode is doub…