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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... the coating and the substrate and alleviate the stress in the thermal shock cycle. The most common used material is C/SiC coating [15-17]. The gradient distribution of Si and C elements......
(2) 4Fe3++3H2O→Fe(OH)3+3H+ ...]. 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......
为浸出剂,分别对不同类型的正极活性物质进行浸出,结果表明,在最佳条件下,LiCoO2,Li2MnO2,LiNi1/3Co1/3Mn1/3O2以及LiFePO4中锂的浸出率均可达到92%以上,而其他金属(Co,Ni,Mn和Fe等)的浸出率均在20%以下.对浸出过程的动力学进行研究发现,Li的浸出过程受扩散控制,且浸出表观活化能远比其他金属的低,这证实了Li与其他金属相比易于被浸出.PENG等[81...高等优点,但萃取剂价格昂贵,且萃取剂本身具有一定的毒性,可能会造成二次环境污染.基于此,LI等[88]采用Fe粉置换从含有Ni,Co以及Mn等离子的废旧锂离子电池浸出液中除铜,在最佳条件即温度为30 ℃,Fe与Cu质量比为1.5,反应时间为30 min时,浸出液中残留的Cu2+质量分数最低可降至0.175×10-6.Fe粉置换除铜避免了有机物萃取剂的引入,但除铜后液中又引入了Fe2+,需进一步氧化......
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...CH4转化的研究最为广泛,由于Ni对CH4良好的催化活性,Ni改性的铁基载氧体通常又可以称为双功能载氧体,具有以下特征:掺Ni的铁基载氧体与CH4的反应活性有明显提升[76],合理的调配Ni/Fe比可以改变CH4反应的选择性[77],CO2氧化性较弱无法氧化Ni0[13].Ni改性的铁基载氧体也被用于CH4,CO2同时转化,在CLPD过程中,Ni改性的Fe2O3/Al2O3载氧体表面CH4转化率比......
(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......
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...[50]针对铁浴碳-氢复吹熔融还原铁矿工艺,研究建立了反应器动力学模型,认为引入H2后还原效果优于纯碳还原,而在合适比例下的碳-氢混合还原又优于纯H2还原；提高n(C):n(H2)比例,有利于提高产能,而随着H2量的增加,渣中铁含量降低；碳-氢混合还原以及纯碳,纯H2还原反应速率常数分别为2.34 g-Fe/(cm2·min),1.7~1.85 g-Fe/ (cm2·min),2.05 g-Fe......
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......
