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61.
研究了在高温,高压(T=180℃,p=1.0~1.2×10^6Pa)的加磷酸盐情况下,苛性碱分解高钙黑钨精矿的工艺,试验表明,高钙钨精矿的分解率(η)可达98%以上,钨酸钠溶液中P/W比值也能满足工艺要求,与常温,常压工艺相比苛性碱的用量降低,分解时间缩短。 相似文献
62.
Yao Cai Hui-Dong Liu Zhong-Wei Hu Qiang Wan Chang Luo Hao Chen Yan Liu Yan-Ming Chen Qing-Song Mei Bing Yang 《核技术(英文版)》2018,(1)
Nanocomposite Cr C/hydrogenated amorphous carbon(nc-CrC/a-C:H) coatings were deposited by a hybrid beams system comprised of a hollow cathode ion source and a cathodic arc ion-plating unit with varying H_2 flow rates. The influences of H_2 flow rates on the morphologies, microstructures, and properties of the coatings were systematically studied. The morphologies and microstructures of the coatings were characterized by SEM, AFM, XPS, Raman spectroscopy, GIXRD, and HRTEM. The mechanical and tribological properties were measured by a nano-indenter, scratch tester, and ball-ondisk tribometer. The wear tracks were evaluated using 3D profilometer, optical microscope, and EDS analysis. It has been found that a moderate H_2 flow rate can effectively smooth the surface, enlarge the fraction of a sp~3 bond, and improve the properties. The coating exhibits the highest hardness and elastic modulus at the H_2 flow rate of 40 sccm. A superior combination of adhesion strength,friction coefficient, and wear resistance can be achieved at the H_2 flow rate of 80 sccm. 相似文献
63.
以苏州钢铁厂钢包为原型,通过水模和中频感应炉实验,确定了IR-UT-16型精炼装置的设备参数和工艺参数,证实了采用Al或Si-Ca-Ba-Al作发热剂进行钢水吹氧升温的可行性,钢水成分可满足小方坯连铸的要求。 相似文献
64.
65.
本文以连通片检测器无性模板的设计为例,给出了细胞神经网络中无性模板的设计方法及连通片检测器无性模板中各元素的数值范围。 相似文献
66.
67.
Prohl传递矩阵—Newmark差分公式积分法 总被引:1,自引:0,他引:1
本文提出了借Newmark法建立传递矩阵,然后用Prohl法求非线性转子-支承系统的瞬态响应及分析稳定性的方法.这方法综合了Prohl法和Newmark法的优点.此外为克服Prohl法的缺点-数值不稳定,传递向量采用了■,而不是传统的■.文中实例计算了装有挤压油膜阻尼器的单转子和双转子-支承系统的瞬态响应,其结果与Runge-Kutta法的结果相吻合. 相似文献
69.
With the development of MEMS and the electronic devices's miniaturization and integration, a new kind of power sources that can satisfy the need for high energy density is required. Microbatteries are being researched abroad for their advantages of extreme thinness and long-term power supply. The development of MEMS microbatteries are reviewed and suggestedmagnetron sputtering in fabricating a high-performance microbattery. The technics as annealing are analyzed. The microbattery with a LiNi1-x Cox O2 cathode exhibited stable cycle ability and a high specific discharge capacity, which was attributed to the alloying effect of the LiNiO2and LiCoO2. 相似文献
70.
Donglin He Ping Li Wei Wang Qi Wan Jian Zhang Kai Xi Xiumei Ma Zhiwei Liu Lin Zhang Xuanhui Qu 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(5)
Although silicon‐based materials are ideal candidate anodes for high energy density lithium‐ion batteries, the large volumetric expansion seriously damages the integrity of the electrodes and impedes commercial processes. Reasonable electrode design based on adjustable structures of silicon and strong binders prepared by a facile method is still a great challenge. Herein, a three‐pronged collaborative strategy via hollow nanocubes, amorphous Void@SiOx@C, and in situ cross‐linked polyacrylic acid and d ‐sorbitol 3D network binder (c‐PAA‐DS) is adopted to maintain structural/electrode integrality and stability. The all‐integrated c‐PAA‐DS/Void@SiOx@C electrode delivers excellent mechanical property, which is attributed to ductility of the c‐PAA‐DS binder and high adhesion energy between Void@SiOx@C and c‐PAA‐DS calculated by density functional theory. Benefiting from the synergistic effect of accommodation of the hollow structure, protection of outer carbon shell, amorphous Void@SiOx@C, and strong adhesive c‐PAA‐DS binder, c‐PAA‐DS/Void@SiOx@C shows excellent electrochemical performance. Long cycling stability with a reversible capacity of 696 mAh g?1 is obtained, as well as tiny capacity decay after 500 cycles at 0.5 A g?1 and high‐rate performance. The prelithiated Void@SiOx@C||LiNi0.5Co0.2Mn0.3O2 (NCM523) full cell is also assembled and shows a reversible capacity of 157 mAh g?1 at 0.5 C, delivering an excellent capacity retention of 94% after 160 cycles. 相似文献