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Effect of inoculation during different phases ofagricultural waste composting on spectroscopic characteristics of humic acidHUANG Hong-li(黄红丽)1, ZENG Guang-ming(曾光明)2, 3, LUO Lin(罗琳)1, ZHANG Jia... phases of agricultural waste composting and its effect on the spectroscopic characterization of humic acid (HA) was studied. Three runs were used in this study: Run A was the control without inoculating......
Biosorption behaviors of Cu2+, Zn2+, Cd2+ and mixture by waste activated sludge LUO Sheng-lian(罗胜联)1, 2, YUAN Lin(袁 林)1, CHAI Li-yuan(柴立元)1, MIN Xiao-bo(闵小波)1, WANG Yun-yan(王云燕)1, FANG Yan(方 艳)1... 410082, China Received 27 April 2006; accepted 12 September 2006 Abstract: Biosorption of heavy metal ions, such as Cu2+, Cd2+ and Zn2+, was carried out using waste activated sludge from municipal......
影响烧结NdFeB矫顽力因素的研究概况胡礼福,易健宏,吕豫湘,彭元东,叶途明摘 要:概述了烧结NdFeB系永磁材料矫顽力的影响因素及其理想微结构,并着重介绍了采用添加元素和新工艺提高其矫顽力的方法.关键词:NdFeB永磁体;显微结构;矫顽力;新工艺;......
Cu-SiC复合电极电火花加工烧结NdFeB永磁体的研究李丽,程祥,李志永,牛宗伟山东理工大学机械工程学院摘 要:将超声波和复合电沉积技术相结合制备了Cu-SiC复合电极材料,利用SiC颗粒高熔点,高导电性的特点探索对烧结NdFeB永磁体电火花的可加工性.研究了Cu-SiC电极对NdFeB永磁体加工效率,加工效果的影响规律.结果表明SiC颗粒在火花放电中使电场产生畸变,降低了击穿电压,火花痕迹大而浅,表面粗糙度降低;同时提高了加工效率,降低了电极损耗.关键词:Cu-SiC电极;电火花加工;烧结NdFeB永磁体;电极损耗;......
双合金结合速凝工艺制备烧结NdFeB研究 朱明刚1,徐志斌2 (1.钢铁研究总院功能材料研究所,北京,100081;2.西京学院机电工程系,陕西,西安,710123) 摘要:采用速凝工艺制备了主相合金铸片, 由其微观形貌分析可见,富Nd 相呈薄层状均匀分布在主相晶界处.XRD 分析表明铸带形成了明显的取向织构.使用普通熔炼方法熔炼几种不同成分的辅相合金.将主相合金与辅相合金配比,运用双合金法工艺制备出烧结NdFeB磁体.研究表明Pr替代Nd 有利于提高磁体的剩磁. 关键词:速凝工艺; 双合金工艺; 烧结NdFeB磁体; 稀土; strip casting technique; dual-alloy technology; sintered NdFeB magnets; rare earths; [全文内容正在添加中] ......
Study of Technology of Stripping Nickel Coating on NdFeB Permanent Magnet Rao Houzeng1,Jiang Longfa1,LI Guohua2,Lin Guanjie1 (1.Department of Environmental and Chemical Engineering, Nanchang... in the solution of stripping the nickel coating on NdFeB permanent magnet on the stripping result were studied systematically.The practical formular contains mainly the oxidant m-O2NC6H4SO3Na, the complex......
J. Cent. South Univ. (2018) 25: 543-549 DOI: https://doi.org/10.1007/s11771-018-3759-y Recycling and depolymerization of waste polyethylene terephthalate bottles by alcohol alkali hydrolysis SUN... hydrolysis method was explored for the preparation of terephthalic acid (TPA) from waste polyethylene terephthalate (PET). First, a series of single factor experiments on the depolymerization rate of waste......
高矫顽力NdFeB永磁薄膜的研究进展刘文峰,张敏刚,张克维,柴跃生太原科技大学材料科学与工程学院先进材料研究所摘 要:NdFeB永磁材料具有优异的性能而广泛应用于各种电子器件及系统中.电子器件及系统的微型化要求NdFeB永磁材料薄膜化,而绿色经济和低碳经济的发展又扩大了对高矫顽力NdFeB永磁薄膜的需求.综合介绍了NdFeB永磁薄膜的制备方法,着重论述了磁控溅射法制备高矫顽力Nd FeB永磁薄膜的研究进展,最后展望了高矫顽力NdFeB薄膜研究未来的发展方向.关键词:NdFeB永磁薄膜;高矫顽力;制备方法;磁控溅射;......
NdFeB永磁材料腐蚀与防护研究进展宋振纶中国科学院宁波材料技术与工程研究所摘 要:NdFeB永磁材料的应用范围不断拓广,对表面防护技术提出更多新要求.介绍了NdFeB永磁材料腐蚀过程以及NdFeB磁体因表面处理过程产生损伤的机理的最新研究进展,同时也介绍了我们在复合电镀,复合化学镀,磷化,物理气相沉积铝镀等技术研究及产业化方面的进展.关键词:NdFeB永磁材料;腐蚀;电镀;化学镀;磷化;物理气相沉积;......
影响NdFeB永磁合金磁性的微观结构分析王晓丽1,2,丁开鸿3,崔胜利3,孙永聪3,杨平4,李木森11. 山东大学材料液固结构演变与加工教育部重点实验室2. 江苏科技大学材料学院3. 烟台首钢磁性材料股份有限公司4. 北京科技大学材料科学与工程学院摘 要:以N35TH烧结态NdFeB永磁合金为实验材料,进行时效态处理,系统分析了合金微观结构对磁性的影响.通过场发射扫描电镜观察了合金形貌,结果表明,影响NdFeB磁性的内在因素包括在主晶相Nd2Fe14B晶界处富稀土相的形态和分布,主晶相晶界的平直规整和Nd2Fe14B主晶相的数量增加,而且NdFeB永磁合金中具有<001>强织构和<001>取向的主晶相Nd2Fe14B晶粒明显增多,也是导致磁性改善的重要原因.关键词......
