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to DMDC. The supernatant was used to determine the lead ions by using the ICP. 2.4 Contact angle measurement Contact angles of mineral samples were measured using a contact angle instrument analysis... the hydrophobicity and the better the floatability of mineral. In order to study the effect of ZnSO4 and DMDC on the hydrophobicity of mineral surfaces, the contact angles of galena and sphalerite surfaces......
sinusoidal grid surface were evaluated by measuring the static contact angles for each sample. In this research, the best contact angle was measured to be 120.5° on the sinusoidal grid surface with profile... The wetting properties of the UV-moulded sinusoidal grid surface were evaluated by measuring the static contact angles (CAs) for each sample. In all measurements, a volume of the water droplet......
Effect of sintering temperature on the physical properties and electrical contact properties of doped AgSnO2 contact materialsHai-tao Wang1,2,Zi-xiang Wang1,2,Lian-zheng Wang1,2,Jing-qin Wang1,2,Yan... and Electrical Apparatus Reliability of Hebei Province,School of Electrical Engineering,Hebei University of Technology摘 要:AgSnO 2 electrical contact materials......
刚度. 1.3 丝间多层接触建模 单股钢丝绳丝间接触模型如图3所示,图3中芯丝与内层螺旋钢丝间的接触为线接触,接触区为具有一定宽度的空间螺旋区域,定义该区域的中线为名义接触线nmc;内层和外层螺旋钢丝间的接触为点接触,定义内外层螺旋钢丝上的点接触区中心连线分别为各自钢丝的名义接触线nmo和nom. 图3 单股钢丝绳丝间多层接触模型 Fig. 3 Contact between multiple...与外层螺旋钢丝的接触线,点G和H为接触线上2个相邻接触点. 图4 内层和外层螺旋钢丝间接触关系 Fig. 4 Contact relationship between middle layer and outer spiral wires 根据图4中几何关系可知,内层和外层螺旋钢丝在接触线上两接触点间的距离λmo和λom分别为 (19) (20) 式中:2个接触线的螺旋夹角为ωm_o=;Nm和......
; Surface energy of untreated SIR sample was calculated using measured contact angles to be 27.37 mJ/m2. It is higher than the reported value of 21.6 mJ/m2... spectroscopy (XPS) were used to observe the variation of the functional groups of the modified SIR. Static contact angle (SCA) was employed to estimate the change of hydrophobicity of the modified SIR......
Contact Analysis and Modeling of Standing Wave Linear Ultrasonic Motor时运来State Key Laboratory of Mechanics and Control of Mechanical Structure,Nanjing University of Aeronautics & AstronauticsDigital Manufacturing Equipment and Technology National Key Laboratory,Huazhong University of Science and Technology摘 要:A contact model for describing the contact......
and characteristics analysis of high contact ratio gears based on pressure angle WANG Jian1, LUO Shanming1, SU Deyu2 (1. School of Mechanical and Automotive Engineering, Xiamen University of Technology... stability and high contact ratio for gears used in the aerospace and automotive fields, an active design method for high contact ratio spur gears based on pressure angle was proposed. The mathematical......
Electrical breakdown characteristic of a Ce-doped W-Cu contact materialHU Kewen,CHEN Mianzhi,and YE Heng School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China摘 要:W-Cu composite powder doped with Ce (1.5 wt.%) was prepared by mechanical alloying (MA),and the W-Cu contact material was fabricated by hot pressing......
, China) Abstract: In order to study the related law of the tensile strength of slates in different bedding angles in dry and saturated condition, failure load, saturated water content, tensile strength of slates of different bedding angles were obtained by Brazilian splitting test using microcomputer control electro-hydraulic servo universal testing machine. The related laws and the failure mode......
接触角及矿物的表面能参数 Table 2 Contact angles of test liquids on the surface of molybdenite and surface free energy parameters of minerals 由表2可见,辉钼矿表面属于典型的低能表面,其和均较低,因此,接近于非极性表面.与辉钼矿相比,脉石矿物表面能的分量较低,与此...,3种捕收剂Lewis碱分量由高到低的顺序是:CSU31,柴油,煤油. 表3 检测液体在捕收剂膜表面的接触角及捕收剂的表面能参数 Table 3 Contact angles of test liquids on the surface of collector films and surface free energy parameters of collectors......