共查询到19条相似文献,搜索用时 218 毫秒
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用点滴加入镀液的方法进行了木材化学镀镍试验,分析施镀温度、镀液pH值和施镀时间等对镍金属沉积速率的影响,得出比较理想的镀镍工艺条件. 相似文献
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化学镀镍桦木单板的镀层成分分析及性能研究 总被引:3,自引:2,他引:3
通过对桦木单板表面化学镀镍,可以得到连续、均匀的镀层,从而制得具有良好导电性和电磁屏蔽功能的木材-金属复合材料。扫描电子显微镜(SEM)观察表明:看似光滑的桦木单板表面是很粗糙的,经化学镀后桦木表面金属感极强,但基本构造没有明显改变。利用能谱(EDS)和X射线光电子能谱(XPS)分析表明:镀层中主要成分为镍,磷含量很低。X射线衍射仪分析表明镀层为多晶结构。此木材-金属复合材料的电磁屏蔽效能在9kHz~1.5GHz的频率范围内可达到60dB,导电性和导热性能较素材有显著提高。 相似文献
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木材表面化学镀处理技术 总被引:3,自引:0,他引:3
现实生活中电子产品在室内环境中的运用日益增多,为解决木质产品的电磁屏蔽性,将电子产业成熟的化学沉积金属镀工艺技术引入到木材处理中,阐述了化学镀的机理及其在木材加工中的利用,以木材化学镀铜、镀金工艺为例,从其研究进展、处理工艺、质量评价等方面分析了木材化学镀铜、镀金处理后材料的性能以及生产应用的可行性. 相似文献
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化学镀镍单板的导电性和电磁屏蔽效能 总被引:2,自引:0,他引:2
为了实现单板的导电性和电磁屏蔽效能,对单板进行了化学镀镍研究,通过表面电阻率和电磁波网络分析仪测量方法对化学镀镍单板的导电性和电磁屏蔽效能进行了分析。结果表明:化学镀镍单板的导电性随着金属镍沉积量的增加而增加,但单板的导电性具有各向异性,平行于纤维方向的导电性要好于垂直于纤维方向的导电性。此外,这种各向异性在金属镍沉积量较少的情况下表现得更加明显,化学镀镍单板的电磁波屏蔽效能随着由于金属镍沉积量的增加而引起导电性的增加而增大,在本研究中化学镀镍单板的电磁波屏蔽效能可以达到30~60dB。 相似文献
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刘秀田 《林业机械与木工设备》1985,(1)
一、前言快速镍是刷镀维修技术中最常用的镀种之一。因其具有耐磨性较高、镀积速度快等优点,所以被广泛地用于修复各种机械零件的磨损表面。可是快速镍刷镀层的耐磨性并不是不变的,它与所修复零件(镀层)的工作条件,即摩擦磨损工况有关。并且,刷镀工艺参数选择得 相似文献
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ZHOU Gao ZHAO GuangjieCollege of Material Science Technology Beijing Forestry University Beijing P.R.China 《中国林业科技(英文版)》2004,3(4):76-80
The use of more and more electron products requires interior wood products to have the performance of electromagnetic shielding. One of the ways to realize it is to introduce the chemical plating which has already been developed in electron industry into wood processing. The paper clarifies the mechanism of electroless copper and gold plating and its application to wood. It emphasizes the development and technology of electroless copper and gold plating on wood. Meanwhile, it points out that it is highly feasible to take this technology into effect. 相似文献
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利用化学镀技术,在木材加工用硬质合金圆锯片上制备了Ni-P合金镀层,通过XRD、中性盐雾实验和显微硬度分析等手段,对镀层的组织特征、热稳定性、耐蚀性及硬度等进行了分析。锯片的切割实验表明,Ni-P合金镀层具有均匀致密、硬度高、耐磨性高、减摩擦、耐蚀性好等特性。 相似文献
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The regeneration of exhausted solutions of electroless nickel plating wood veneer was realized using soluble calcium salt
to precipitate and remove phosphite and then using fluoride to remove residual calcium ions from the solution. The effect
of the pH value of the solution, treatment temperature and the molar ratio of calcium ions to phosphite ions on the removal
efficiency of phosphite was investigated. Wood veneer was electroless plated using regenerated solutions. A coating with better
electrical conductivity and electromagnetic shielding was obtained.
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Translated from Journal of Northeast Forestry University, 2005, 33(3): 47–48 [译自: 东北林业大学学报, 2005, 33(3): 47–48] 相似文献
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桦木单板化学镀镍过程的FTIR和XPS分析 总被引:1,自引:0,他引:1
采用化学镀法在桦木表面获得Ni-P合金镀层.利用傅立叶红外光谱(FTIR)和X射线光电子能谱(XPS)技术,分析桦木单板化学镀前预处理后,桦木表面官能团的变化和化学镀后元素的变化.FTIR分析表明:分别经活化和解胶处理后的桦木单板表面FTIR谱与素材几乎重合,表明活化和解胶处理过程没有使木材表面发生任何化学反应.XPS分析结果表明:活化后桦木单板表面吸附了内部包裹着具有催化作用的Pd0胶粒,此时Pd0起不到催化作用;解胶后,Pd0才显露出来并催化化学镀反应的进行,但化学镀过程之初是Ni先沉积而P的沉积滞后,所得镀层成分为Ni-P合金. 相似文献
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Electromagnetic interference shielding material from electroless copper plating on birch veneer 总被引:1,自引:1,他引:0
Copper coating on birch veneer substrate was conducted by electroless deposition to prepare electromagnetic interference shielding material. In the process, Pd2+ ions were chemically adsorbed on the wood surface modified with chitosan. Then, they were reduced and dipped into a plating bath where copper film was successfully initiated. The coatings were characterized by SEM–EDS, XPS, and XRD. The metal deposition, surface resistivity, and electromagnetic shielding effectiveness were measured. The morphology of the coating observed by SEM is uniform, compact, and continuous. EDS, XPS, and XRD results showed that the coating consists of Cu0 with crystalline structure. Moreover, the copper films firmly adhere to the wood surface. Birch veneers plated with crystalline copper film exhibit high electro-conductivity with surface resistivity of 119.1?mΩ?cm?2 and good electromagnetic shielding effectiveness of over 60?dB in frequencies ranging from 10?MHz to 1.5?GHz. 相似文献
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P. Sittisart M. M. Hyland M. A. Hodgson C. Nguyen A. Fernyhough 《Wood Science and Technology》2014,48(4):841-853
The aim of this project was to fabricate electroless nickel-coated cellulose fibres. Ultimately, these nickel-coated cellulose fibres will be used to develop a cost-effective polymer composite for electromagnetic interference (EMI) shielding and/or electrostatic discharge (ESD) applications. An attempt has been made to impart electrical conductivity onto cellulose fibres via an electroless nickel plating process. The aim was to achieve a homogeneous, continuous layer of Ni on the cellulose fibres, and the plating conditions were optimized to achieve this. The relationship between the coating morphology and the performance of the coated fibre was also of interest. Testing was carried out using cellulose filter paper and then loose cellulose fibres. Scanning electron microscopic (SEM) images of nickel-coated filter paper showed that nickel particles are bonded to the cellulose fibres. The coating appeared more compacted and continuous as plating time increased, corresponding to lower surface resistivity. This observation suggested a correlation between morphology and electrical conductivity of the coating. For nickel-coated cellulose fibres, after optimization of plating conditions, a uniform deposition of nickel particles around the cellulose surfaces was confirmed by SEM images. EDS and XRD results confirmed similar coating could be produced on filter paper and cellulose fibres. SEM images of cross-sectioned nickel-coated cellulose fibres illustrated nickel particles had penetrated into the inner walls of the cellulose fibres. This impregnation of the fibres should act to increase the bonding between nickel coating and cellulose fibres. These nickel-impregnated cellulose fibres could now be incorporated into a polymer matrix to create an electrically conducting composite with the right processing parameters. 相似文献
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介绍几种表面涂层木工刀具的加工方法和使用状况,分析表面涂层刀具的切削特点和磨损形态,概述了国内外研究进展.研究成果表明,涂层处理可以延长刀具使用寿命,减少刃磨和换刀时间,提高生产效率和表面加工质量. 相似文献
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Surface characteristics of electroless nickel plated electromagnetic shielding wood veneer 总被引:4,自引:0,他引:4
WANG Li-juan LI Jian LIU Yi-xing 《林业研究》2005,16(3):233-236
Wood is a kind of porous natural material with very poor electro-conductivity, and it has almost no function of electromagnetic shielding. The method of electroless nickel plating was used to produce wooden material with electrical and effective electromagnetic shielding properties. Ni-P alloy layer was obtained on wood surface. The surface feature of plated wood veneer was observed by SEM and the surface composition and microstructure of the layer under different conditions were investigated by EDS and XRD respectively. Meanwhile, the relevant surface resistivity and electromagnetic shielding effectiveness were measured. Correlations of the phosphorous content in the layer to the structure of Ni-P alloy, electro-conductivity and electromagnetic shielding of plated veneers were discussed. SEM photos showed that the surface of electroless nickel plated veneers were covered with Ni-P alloy layer entirely, which made wood veneers more like metal. At the same time, the results showed that with the decreasing of the phosphorous content in the layer, the microstructure of Ni-P alloy layer transformed to be microcrystalline and electro-conductivity and electromagnetic shielding effectiveness were improved. When the phosphorous content was less than 2.37wt pct in the layer, the microstructure of Ni-P alloy layer was microcrystalline structure and its sur- face resistivity and electromagnetic shielding effectiveness were nearly 0.5Ω/□ and 55-60dB respectively. 相似文献
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无电解电镀法制备具有电磁屏蔽功能的木材-金属复合材料 总被引:4,自引:0,他引:4
利用无电解电镀的方法制备了导电且具有电磁屏蔽功能的木材-金属复合材料.探讨了镀液用量、施镀时间和施镀温度对复合材料的表面电阻率和电磁屏蔽效能的影响,同时利用能谱分析(EDS)、X射线衍射分析(XRD)和扫描电镜分析(SEM)方法分别测定了不同施镀温度下得到的各镀层的磷含量、微结构和表面形貌.实验结果表明,在镀液使用量为500mL,施镀时间为30min和施镀温度为62℃的最优条件下,所得镀层的导电性和电磁屏蔽效果最佳.而且发现,随着施镀温度的提高,镀层中磷含量缓慢增加.XRD分析表明不同温度所得各镀层的结构均为多晶结构,通过SEM分析,镀层均匀、连续且具有金属光泽,说明在pH值一定的条件下,施镀温度对镀层结构和表面相貌的影响很小.图7表3参11. 相似文献