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算 常用的载氧体为Fe,Co,Ni,Cu和Mn的氧化物,在600~1 200 ℃下CH4与常见氧化物的反应热力学数据如图3所示,lg K越大说明金属氧化物与CH4反应越容易,MnO2/Mn2O3,Mn2O3/Mn3O4,Co3O4/CoO,CuO/Cu2O比Fe2O3/Fe3O4和NiO/Ni更容易氧化CH4,并且Fe2O3/Fe3O4,Mn2O3/Mn3O4,CuO/Cu2O和NiO/Ni都可以...可以提高载氧体的反应活性[68].IMTIAZ等[69-70]使用Cu改性的铁基载氧体,Cu0可以促进FeO还原到Fe0,并且Cu覆盖在表面有利于提高载氧体的抗积碳性能,QIN等[71]使用1%的Cu改性铁基载氧体,在700 ℃时CH4转化率是未改性载氧体的470%.稀土金属如La,Ce和Y等也被用于改性铁基载氧体,KANG等[72]发现Y改性的Fe2O3/Al2O3载氧体CH4转化率达98%的同......
Yue-xian, MA Li-qiang, WU Lun, et al. The role of surface cleaning in high intensity conditioning[J]. Powder Technology, 2017, 319: 26-33. [5] YIN Wan-zhong, XUE Ji-wei, LI Dong, et al. Flotation......
of copper powder[J]. Hydro- metallurgy, 2006, 82(3/4): 154-156. [52] YI G, CAI F, PENG W, et al. Experimental an analysis of pinholes on electrolytic copper foil and their prevention[J]. Engineering...合硅烷偶联剂的铜箔抗剥离强度为21.76 N /cm,煮2 h后剥离强度为21.56 N/cm,损失率为0.92%；浸288 ℃焊锡20 s后,抗剥离强度为21.76 N/cm,损失率为0,与单独使用KH-550或HK-560相比可大幅提升铜箔与树脂胶板的抗剥离强度.Li等[30]以三甲氧基丙基硅烷(TMPS)和双(三甲氧基硅烷)乙烷(BTMSE)为环保黏合剂,采用溶胶凝胶法和浸渍法对Al,Cu......
rock, subscript w is the boundary between CTB and stope, Tb is the temperature of surrounding rock, n is the normal direction of w boundary, T0 is the initial temperature of CTB in thermal accumulation... of the heat convection capacity. Nomenclatures T Temperature, °C cp Specific heat at constant pressure, (kJ×kg×°C-1) h Surface convective heat transfer coefficient, (w×m-2×°C-1) q Heat transfer rate, kW......
a detailed synthesis of ore-forming setting, ore geology, and metallogenic regularities of ten Cu polymetallic deposits in the Yunnan province [98]. Furthermore, the polygenetic characteristics of Cu... of Dongguashan Cu (Au) deposit and Xinqiao Cu-S-Fe deposit in the Middle-Lower Yangtze River Valley Metallogenic Belt (MLYRB), and Yongping Cu deposit in the Qinzhou-Hangzhou Metallogenic Belt (QMB......
J. Cent. South Univ. (2020) 27: 3477-3498 DOI: https://doi.org/10.1007/s11771-020-4467-y Warm asphalt rubber: A sustainable way for waste tire rubber recycling YU Hua-yang(于华洋)1, 2, DENG Guan-sen(邓冠森)1, WANG Duan-yi(王端宜)1,ZHANG Ze-yu(张泽宇)3, OESER M3 1. School of Civil Engineering and Transportatio......
forces from rock blocks. Cutters today can either incorporate hard, fine grained carbides into the matrix of the disc material or apply a hardened coating of alloy powder on the steel substrate... for an improvement in the cutting efficiency. RAD and MCGARRY [102] used a 750 W CO2-N2-He laser to treat the same rock and then excavated the lased rock with a drag bit. They found that laser radiation could......
在合金中的扩散系数；2) 减少氧在合金中的扩散系数及溶解度；3) 减少或消除瞬态氧化[25]. 3.1.1 整体合金化 早期SHIDA等[21]系统研究了添加少量合金元素(1%~2%,质量分数)对TiAl基合金大气环境高温氧化行为的影响,大致可分为3类:1) 有害元素,如Cu,Y,V,Cr和Mn；2) 中性元素,如Sn,Zr,Hf,Ta,Ni和Co；3) 有益元素,如W,Mo,Nb...化物层/(Cr, Ti)Al2/TiAl3(含TiAl2)结构硫化层可明显延长合金抗高温氧化时间(如TiAl-10%Cr(摩尔分数)合金硫化后在900 ℃大气环境中抗氧化能力可达 750 h以上)[95].IZUMI等[96-97]研究TiAl-2%X(摩尔分数)(X为V,Fe,CO,Cu,Nb,Mo,Ag,W,Si,Mn,Ni,Ge,Y,Zr,La和Ta)合金硫化处理后的氧化行为,把合金元素分成......
的Energy RS2E公司采用氟磷酸钒钠和硬碳匹配的全电池能获得90 W·h/kg的能量密度,日本的夏普公司组装的普鲁士白类/硬碳全电池获得120 W·h/kg的能量密度,且可循环1200次,国内的中科海钠公司(陈立泉院士团队)开发的Na-Cu-Fe-Mn-O层状化合物/软碳全电池具有120 W·h/kg的能量密度以及2000次循环寿命. 水系锌离子电池也具有很强的资源优势,且兼具安全,廉价,无...富的3d过渡金属元素,如Fe,Mn,Co,Cu等.钠离子位于TMO6层间的三棱柱位置.由于最初是富钠相,这种材料可以释放出较高的比容量.例如,KOMABA等[93]报道的P2-Na2/3[Fe1/2Mn1/2]O2通过引入电化学活性Fe3+/ Fe4+氧化还原对显示出高达190 mA·h/g的可逆容量,通过锰替代部分铁来稳定Fe4+,最终获得高达2000 W/kg的功率密度.含钠量较高的......
