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declined and became essentially the same. CO chemisorption results revealed that the suppressed activities of the aged catalysts were mainly due to the decline of palladium dispersion. The turnover......
of selenium,tellurium,gold,platinum,and palladium are 0.7825%,5.492%,8.333%,0.2587%,and 1.113%,respectively; the precious metals are enriched approximately sixfold.关键词:......
was very stable through the palladium salt test. There was no phenomenon of peeling and blistering on the surface of the Ni-W-P alloy glass fibers in the thermal shock test. It showed that the deposit had......
palladium as a surface catalyst.The influence of catalyst activation conditions on coatings’ properties was assessed by structural,morphological,electrical,mechanical measurements and adhesion......
in wetting reaction between Sne3.0Age0.5Cu solder balls and electroless nickel electroless palladium immersion gold(ENEPIG) pads at 250 C was investigated. The interfacial IMCs transformed from initial......
declined and became essentially the same. CO chemisorption results revealed that the suppressed activities of the aged catalysts were mainly due to the decline of palladium dispersion. The turnover......
inhibited agglomeration of palladium, increased the number of active sites of Pd, and improved the electrocatalytic properties of Pd for ethanol oxidation.In addition, the Pd/Ni O/NFF loaded Pd catalyst......
an 710049, China) Abstract: Sponge zirconium was employed as raw material to prepare wedge-like specimens of Zr52.5Cu17.9Ni14.6Al10Ti5 quinary alloy by a tilt casting method using ladle-hearth-type arc...最佳加入量为0.1%(摩尔分数), 因此本研究Sc的加入量定为0.3%. 表1 实验用海绵锆的纯度 Table 1 Purity of sponge zirconium for experimental raw material (mass fraction, %) 1.2 分析方法 楔形试样薄端及厚端由于冷却速度差异可使合金获得不同的结构状态......
was characterized by means of X-ray diffraction, adsorption and de-sorption. The cerium zirconium catalyst was obtained by palladium metal impregnation techniques. With methane catalytic combustion.... The catalytic activity of palladium supported cerium zirconium catalyst is high, whose light-off temperature is as low as 352℃. Key words: cerium zirconium mixed oxides; high surface area; good thermal......
基于低温快速预还原的熔融还原炼铁流程赵沛1,郭培民1(1.北京市钢铁研究总院先进钢铁流程及材料国家重点实验室)摘 要:提出了基于低温快速预还原的熔融还原炼铁流程.由三部分组成:熔融气化炉,主要功能是熔化海绵铁和产生预还原所需的还原煤气;预还原部分,由两级快速循环床和一级矿粉预热床组成,主要功能是将矿粉转变成高金属化率的铁粉,金属化率大于85%;煤气处理,包括尾气换热,煤气洗涤,煤气增压,脱除CO2等工序,功能是调节预还原所需的煤气成分,煤气量与温度.新工艺采用精矿粉或粒度小于1 mm的矿粉,具有还原温度低,反应......
