矿床技术经济评价

简要介绍了矿床技术经济评价中的评价阶段及条件。论述了评价的原则、方法和要素。指出在技术经济评价中 ,地勘费是否计入投资 ,对评价的结果影响甚大     

赣西浒坑钨矿床成矿岩体的磷灰石和锆石微量元素特征及其对成岩成矿的指示

赣西地区浒坑钨矿是我国华南钨、锡、铜多金属成矿区与中生代岩浆活动密切相关的典型矿床之一。对浒坑钨矿床中与成矿有关的白云母花岗岩开展了锆石U-Pb定年、磷灰石和锆石原位微量元素研究,结果表明：赋矿白云母花岗岩的成岩时代为（152.3±1.73）Ma;磷灰石具有特殊的“M”型REE球粒陨石标准化配分模式,富F和Mn,贫Cl和Mg;锆石具有高Th/U比值,REE球粒陨石标准化配分模式亏损LREE、富集HREE。锆石微量元素（Ce、U和Ti）温度计和氧逸度计结果表明,锆石形成于岩浆早期高温（800 ℃）和低氧逸度条件下。研究认为,浒坑赋矿花岗岩在演化初期经历了强烈的矿物结晶分异,矿床的形成可能与还原性高分异岩浆演化相关。     

CoCl2在Ni-P基化学沉积中的作用

在Ni-P基化学沉积液中加入氯化钴,得到Ni-Co-P合金镀层,与Ni-P镀层相比较其性能得以改善。研究了氯化钴对化学沉积所起的作用及其影响机制,结果表明:加入适量的CoCl2可有效提高镀层的硬度和耐热溶液腐蚀性能,并能抑制镀层的晶化,提高其晶化温度。     

Initial stages of tin electrodeposition from sulfate baths in the presence of gluconate

Tin electrodeposition in its initial stages in acid sulfate/gluconate baths was studied with varying tin and gluconate concentrations using potential-controlled electrochemical techniques. The deposit morphology was observed by scanning electron microscopy (SEM). A comparison with tin electrodeposition from acid sulfate baths in the absence of gluconate was also carried out. Use of a highly acidic bath leads to nonuniform deposits, even in the presence of gluconate; at pH 4 deposits are uniform, brilliant and suitable for finishing applications. Tin crystallites have a well defined morphology which depends on bath agitation conditions. In the absence of agitation, the crystallites have the same tetragonal shape as in a sulfate bath without gluconate.     

Ni-ZrO2纳米复合电铸层抗高温氧化性能的研究

通过间歇式抗高温氧化实验,建立了纯镍电铸层和N i-ZrO2纳米复合电铸层高温氧化动力学模型,分析了电铸层表面和横截面的形貌,测定了电铸层的组织结构。结果表明,N i-ZrO2纳米复合电铸层抗高温氧化性能明显优于纯镍铸层,复合电铸层表面生成的氧化膜晶粒细小且致密,并且该氧化膜较薄,产生的内应力较小,与复合电铸层的黏附性较好。     

适用于摩托车零件的多层镍电镀工艺

概括目前我国摩托车零件电镀所用镀层组合，对照有关金属覆盖层的国家标准，认为摩托车零件应用多层镍组合，并提供了工艺配方。     

Reforming of methane with carbon dioxide over supported bimetallic catalysts containing Ni and noble metal: I. Characterization and activity of SiO2 supported Ni–Rh catalysts

Cobalt catalysts supported on silica aerogel have been prepared using sol–gel chemistry followed by drying under supercritical ethanol conditions. Three different loadings of cobalt were synthesized: 2, 6, and 10% by weight. Transmission electron micrographs indicate that the metallic cobalt exists as discrete particles 50–70 nm in diameter for the 2 and 6% loadings. The 10% catalyst shows long needles of cobalt. BET and BJH measurements indicate that the catalysts retain the silica aerogel properties of high surface area (∼800 m²/g), large pore volume (∼5 cm³/g), and an average pore diameter in the mesoporous regime (∼25 nm). The catalysts were evaluated for Fischer–Tropsch activity in a laboratory-scale packed bed reactor. All three catalysts were active with the 10% Co catalyst achieving more than 20% CO conversion which corresponds to a rate of 1.53 g CO per g-cat per hour. The catalysts were selective for the C₁₀₊ hydrocarbons with more than 50% of the carbon contained within this fraction. A significant portion of the C₉–C₁₅ hydrocarbon product was observed as 1-olefins which reflects the enhanced mass transport within the very porous aerogel support.     

离子束加速电压对真空电弧沉积Ti(C,N)涂层性能的影响

利用等离子辅助真空电孤沉积技术分别在高速钢片和单晶硅片制备了Ti(C,N）涂层，通过X-射线衍射和扫描电镜研究了不同离子加速电压对单晶硅片上涂层结构和组织形貌的影响，并测定了高速钢片上涂层的显微硬度，同时进行了耐磨性实验。结果表明：涂层主要由TiN和Ti(C,N）组成，随着离子束加速电压的增大，涂层的沉积速度增大，Ti(C,N）的衍射峰不断宽化，晶格尺寸发生变化，但其表面形貌不受影响；当离子束加速电压为1500V时，涂层有较高的耐磨性和显微硬度，当离子束加速电压为2500V时，涂层的耐磨性和显微硬度都有所下降：     

用2－（5－溴－2－吡啶偶氮）－5－二乙氨基苯光度法测定镍合金镀层中的镧

叙述镧（Ⅲ）－２－（５－溴－２－吡啶偶氮）－５－二乙氨基苯酚（在ＰＶＡ和ＣＰＢ存在下）胶束增溶配合物的特性。ｐＨ＝１０．１时，Ｌａ３＋与２－（５－溴－２－吡啶偶氮）－５－二乙氨基苯酚（在ＰＶＡ、ＣＰＢ存在下）生成１：４的紫红色配合物。配合物最大吸收峰在６０５ｎｍ，其摩尔吸光系数ε为１．０×１０５Ｌ／ｍｏｌ·ｃｍ。该配合物形成稳定常数（ＬＯｇβ）为１５．９。０～８０μｇＬａ３＋／５０ｍＬ，服从朗伯－比尔定律。此法用于测定镍基合金镀层中的镧，结果令人满意。     

FINE CONTROL OF HZSM-5’S PORE-OPENING SIZE BY A NEW CVD METHOD

A new CVD method without vacuum condition(CVDWV)was designed in this study,ithad been found that by modifying the flow rate of the carrier gas(N_2)and the temperature of sur-face reaction,silicon saturator and sample tube,the amount of silica deposited on the external sur-face of the zeolite could be precisely controlled,The changes in the physicochemical properties ofzeolite,such as pore-opening size,acidity and reaction property were investigated.The results ob-tained showed that:modification of the improved CVD method did not change the internal structureand acidity of the zeolite,but could bring about significant change of pore-opening size and reactionproperty as desired.