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formation mechanism under different oxygen pressures was discussed. Key words: powder metallurgy; two-phase ternary alloy; high temperature oxidation; low oxygen pressure 锏合金被广泛用作真空... under a low partial pressure oxygen atmosphere[J]. High Temp Techn, 1990,8 f 11: 179 - 193. [ 11] Kofstad P.High Temperature Corrosion[ M]. London: Elsevier Applied Science, 1988. 371 - 376. [ 12] 付广......
Oxygen Storage Capacity of Pt-, Pd-, Rh/CeO2-Based Oxide Catalyst Zhou Zexing1,Weng Duan2,Li Kai2,Wu Xiaodong2,Wang Xuezhong1 (1.Chinese Research Academy of Environmental Sciences, Beijing 100012... of mixed oxides were prepared by coprecipitaion, and a part of these oxides were loaded with precious metals (PM). XRD, BET, and oxygen storage capacity (OSC) investigations were performed on samples aged......
Twin crystal structured Al-10 wt.% Mg alloy over broad velocity conditions achieved by high thermal gradient directional solidificationLuyan Yang1,2,3,Shuangming Li2,Kai Fan2,Yang Li2,Yanhui...="ChDivSummary" name="ChDivSummary">Twin crystal structured Al-10 wt.% Mg alloys that were grown over a broad solidification velocity range were prepared and studied for the first time. The high thermal gradient......
of the mining operation. In tomograms, similar to numerical plots, a high velocity zone is seen on the tailgate which is based on relationship between stress and wave propagation velocity, representing a high stressed zone as the side abutment pressure. Also, a high velocity zone is depicted in the front face that represents the front abutment pressure. On most days, this zone is biased toward......
from the combined effect of the oxygen in the air and water, which can be significantly alleviated by controlling the diffusion of the oxygen in air.Key words:high sulfur-containing bauxite; pyrite...pH variation mechanism of high sulfur-containing bauxiteCHEN Xing-hua(陈兴华)1, 2, HU Yue-hua(胡岳华)1, LI Wang-xing(李旺兴)2, CHEN Xiang-qing(陈湘清)2, CAO Xue-feng(曹学锋)1(1. School of Minerals Processing......
射流参数对单烧嘴燃烧室高温空气燃烧特性的影响的数值研究 射流参数对单烧嘴燃烧室高温空气燃烧特性的影响的数值研究苏亚欣1,汪文辉1,赵丹1,杨艳超1(1.上海市东华大学环境科学与工程学院)摘 要:以工业炉的高温空气燃烧技术应用为背景,对一个单烧嘴燃烧室内的高温空气燃烧特性进行了数值研究.燃烧室尺寸为800 mm×800 mm×1 400 mm,燃烧器烧嘴由燃气和高温预热空气多股射流组成,其中燃料射流喷口为圆形,直径为10 mm,位于中心.空气射流喷口为5个等面积的圆形,置于燃气射流喷口周围.湍流输运方程采用标准k......
~1400 ℃ for 4 h. The density of the sintered pellets was >90% of the theoretical density;their soakage was Key words:Sm doped ceria; coprecipitation; oxygen ion conductor; sintering; solid oxide fuel cell; rare earths; [全文内容正在添加中] ......
- 020-4300-7. 1 Introduction Fuel cells have attracted widespread attention due to their high power generation efficiency, clean fuel (hydrogen, methanol, etc.) and pollution-free emissions. The oxygen... oxygen reduction activity in polymer electrolyte fuel cells [J]. Science, 2009, 324(5923): 71-74. DOI: 10.1126/science.1170051. [5] TAN Hai-bo, LI Yun-qi, JIANG Xiang-fen, TANG Jing, WANG Zhong-li, QIAN......
. The fuel economy of EDI+GPI combustion mode is better than that of EPI+GDI, indicating a more efficient charge cooling effect attributable to the high latent heat of vaporization of ethanol by directly..., because of the favorable evaporation and the high oxygen mole fraction of ethanol, which not only inhibits the formation of particles, but also promotes the oxidation of the particles. The particle......
with oxygen[8]. Demanding limit to the oxygen content will make the manufacture cost of Zr-based metallic glasses very high. Thereby the influence of oxygen impurity on the long-term thermal... melting process. Oxygen concentration of the specimens prepared was measured by hot extraction using a LECO RO-416D2 analyzer. Analysis indicates that the three kinds of alloys made of high-purity crystal......
