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]) The temperature distributions from Figure 2(b) also show that, at the condenser end of the heat pipe, all the temperatures remain constant for all the situations and equal nearly 25 °C. The experimental... presented in Ref. [52] consists of a wrapped screen mesh, made of single-plaited stainless steel. Stainless steel is a steel alloy composed of iron and different proportions of chromium, which is responsible......
to the excessive consumption of the outer Cr-Al-Si alloy coating and there are also some defects appearing in the SiO2 glass layer. SHI et al [67] prepared a La-Mo-Si-O-C coating on the surface of porous SiC pre... for the application of graphite in these fields [4, 5]. Besides, the antioxidant research of carbon fiber reinforced carbon (C/C) composites is the most extensive in all the carbon materials. Due......
]. In addition, the pozzolanic reaction generates more C-S-H, which densifies the cementitious materials and inhibits the penetration of aggressive chemicals [19, 20]. 2) The filling effect. The silica... testing procedure. In addition, it is environmentally significant to carry out this research as the silica fume is the waste from the metal and alloy production industry, while nano- silica can......
100%的Cu和95%的Li被浸出,Mn的浸出率也超过了70%,而Al,Ni以及Co的浸出率只有40%左右.经分析发现,黑曲霉代谢活动中产生的有机酸主要包括柠檬酸,苹果酸,草酸和葡萄糖酸等,其中柠檬酸对金属的浸出率贡献最大. 尽管通过一些离子的催化作用或者改变菌种体系可以使一些金属的浸出率显著提高,但生物浸出方法仍然难以在工业中大规模应用,其原因是:一方面,菌种难培养不易存活,对生长环境要求高；另...现Co,Ni以及Cu的高效浸出,而Mn和Al基本不被浸出. 2.5 辅助强化浸出 一般地,酸浸出和氨浸出都需要较长的浸出时间和较高的浸出温度.为了提高金属的浸出效率,可采用一些辅助方法来增强浸出.常见的辅助浸出手段有超声辅助以及机械化学辅助[71-72]. JIANG等[71]以H2SO4作为浸出剂,H2O2作为还原剂从废旧LiCoO2中浸出Li和Co.在浸出温度为30 ℃和浸出时间为30 min......
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...能力从高到低依次为NiFe2O4,NiO-Fe2O3,Fe2O3,NiO,NiFe2O4中Fe和Ni协同作用导致NiFe2O4氧化还原能力强,虽然NiFe2O4在循环过程中无法完全再生,但是在10次循环过程中具有较好的稳定性.ZENG等[94-95]制备了CoFeAlOx尖晶石型载氧体,通过控制还原深度可以有效提高载氧体的稳定性,并通过掺入不同量的Ni,Cu和Co实现了尖晶石载氧体低温深度还原.六......
(76.82 MPa) can be obtained under the products sintered at 1300 °C for 3 h. The biological activity test and the vitro toxicity study of the 3D printed HAAW composite material immersed in simulated body fluid (SBF) show non-toxic and good biologically active. The morphology of human osteoblasts on the 3DP-HAAW composite surface (1300 °C, 3 h) after six days of incubation is shown in Figure 9. It can......
for Metals, 2006: 117-123. [52] 倪晓明, 骆 琳, 杨森龙, 等. 氢-碳熔融还原实验室试验研究[C]// 2008年非高炉炼铁年会文集. 延吉: 中国金属学会, 2008: 310-315. NI Xiao-ming, LUO Lin, YANG Sen-long, et al. Experiment study on smelting reduction... Zhi-guang, et al. Reduction kinetics of Fe2O3-NiO composites for production of Fe/Ni alloy using hydrogen under non-isothermal conditions[J]. The Chinese Journal of Nonferrous Metals, 2017, 27(1......
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... generated by the impact can be expressed as: P=ρCV where P is the pressure; ρ is the density of the liquid; C is the compressional wave velocity of the liquid and V is the impact velocity. In general......
