EMC用大损耗NiCuZn铁氧体吸收瓦材料研究

３０～１０００ＭＨｚ铁氧体吸收瓦（尺寸为１００ｍｍ ×１００ｍｍ×厚度）在电磁兼容（ＥＭＣ）领域具有广泛的应用。本文采用氧化物工艺制备ＮｉＣｕＺｎ尖晶石铁氧体,测试并分析了用Ｃｕ２＋取代Ｎｉ２＋及Ｃｏ２＋掺杂对材料复磁导率的影响。在９００℃／２ｈ预烧,１１５０℃／２ｂ烧结,得到ＮｉＣｕＺｎ铁氧体相对复磁导率（μｒ＝μ′ｒ－ｊμ″）μ＇ｒ＞１１０,μ″ｒ＞２００（频率ｆ＝３００ＭＨｚ）;通过对该材料优化设计,当铁氧体吸收瓦厚度 ｄ＝５．５ｍｍ,在 ３０～１０００ＭＨｚ,反射率 Ｒ＜－１２ｄＢ,在 ｆ＝５０～８００ＭＨｚ,Ｒ＜－１５ｄＢ。     

Bi掺杂对Ni-Zn-Cu铁氧体的烧结与磁性能的影响

低温烧结软磁铁氧体是表面组装元件（ＳＭＤ）中的一类关键材料。本文对Ｂｉ掺杂的低温烧结Ｎｉ－Ｚｎ－Ｃｕ铁氧体从烧结性质、结构与相组成、显微形貌、磁结构和磁性质（磁导率、品质因数及频谱）方面进行了研究，在此基础上分析了Ｂｉ掺杂对材料形成过程和磁化机制的影响，发现Ｂｉ对材料磁性能的改进所起的作用主要产生于它对材料显微结构（晶粒、晶界和气孔）的调制。     

多层片式电感器用NiCuZn铁氧体的低温烧结

本文利用Ｂｉ２Ｏ３作为结促进剂实现了ＮｉＣｕＺｎ铁氧体在９００℃以下烧结。     

铁磁性Mn—Zn,Ni—Zn铁氧体与铁电性BaTiO3复合材？…

本文研究了铁磁性Ｍｎ－Ｚｎ，Ｎｉ－Ｚｎ铁氧体与铁电性ＢａＴｉＯ３复合材料在１－１０００ＭＨｚ频段内的吸波能力。结果表明；随频率升高，Ｍｎ－Ｚｎ２铁氧ＢａＴｉ／Ｏ３和Ｎｉ－Ｚｎ铁氧体／ＢａＴｉＯ３复合材料的吸波能力逐渐增加；随Ｍｎ－Ｚｎ或Ｎｉ－Ｚｎ铁氧体含量增加，这两类复合材料的吸波能力也逐渐增加；相同配比时的Ｎｉ－Ｚｎ铁氧体／ＢａＴｉＯ３复合材料吸波能力大于Ｍｎ－Ｚｎ铁氧体／ＢａＴｉＯ３。     

ALCHEMI法测定有序合金的马氏体和贝氏体相的原子组态

虽然Ｃｕ－Ｚｎ－Ａｌ和Ｃｕ－Ａｕ－Ｚｎ合金中的母相已知为ＤＯ３或Ｌ２１结构，但通过通道增强微分析原子定位法（ＡＬＣＨＥＭＩ），可以检测Ｃｕ－Ｚｎ－Ａｌ合金的母相，马氏体相和Ｃｕ－Ａｕ－Ｚｎ合金的母相、马氏体、贝氏体相中的原子配置，结果表明，马氏体相中原子配置与母相是完全一样的，但Ｃｕ－Ｚｎ－Ａｌ合金听时效马氏体的Ｃｕ－Ａｕ－Ｚｎ合金中贝氏体与母相不同。本文叙述ＡＬＣＨＥＭＩ测定的结果。     

ICP－AES法测定工业废水中铬镍锌铜镉含量

研究了采用ＩＣＰ－ＡＥＳ田法测定工业废水中Ｃｒ、Ｎｉ、Ｚｎ、Ｃｕ和Ｃｄ含量的试验方法。该法用于国家标准水样和工业废水样品分析，获得满意的结果，并产生了经济和社会效益。     

低温烧结Nb2O5-Bi2O3-ZnO系高频介质陶瓷

本文研究液相添加剂（ Ｃｕ Ｏ、 Ｖ２ Ｏ５ 、 Ｌｉ Ｆ、 Ｐｂ Ｏ、 Ｈ３ Ｂ Ｏ３ 、 Ｂｉ２ Ｏ３） 对 Ｎｂ２ Ｏ５ Ｂｉ２ Ｏ３ Ｚｎ Ｏ 系陶瓷的烧结和介电特性的影响基于实验结果, 研制的 Ｎｂ２ Ｏ５ Ｂｉ２ Ｏ３ Ｚｎ Ｏ 系陶瓷的烧结温度９００‘ Ｃ, 介电性能为： εｒ ＝ １５０ ～１７０ , ｔａｎ δ＝ ０００２ ～０００８ （１００ Ｍ Ｈｚ） , 电容温度系数（ Δ Ｃ Ｃ） ±５ ％（１ Ｍ Ｈｚ）     

ZnO/Co2O3敏感电阻单元材料V-I非线性及NTC效应

制备的ＺｎＯ／Ｃｏ２Ｏ３敏感电阻单元材料同时具有伏安（Ｖ－Ｉ）非线性等性及负温电阻（ＮＴＣ）效应。两种效应的形成与烧结过程９００℃热处理温度密切相关。差热分析（ＤＴＡ）曲线表明：Ｃｏ２Ｏ３在９０４℃有一相变吸收峰。在该温度点保温热处理的ＺｎＯ／Ｃｏ２Ｏ３敏感电阻单元材料获得相对在的伏安非线性和ＮＴＣ效应。电子自旋共振谱（ＥＳＲ）证明,Ｃｏ离子由烧结热处理前的Ｃｏ＾３＋价变成热处理后的Ｃｏ＾２＋价,     

过渡金属氧化物NTC厚膜热敏电阻烧结工艺的研究

较详细地研究了Ｃｏ－Ｍｎ－Ｏ，Ｃｏ－Ｍｎ－Ｎｉ－Ｏ，Ｍｎ－ＮｉＣｕ－Ｆｅ－Ｏ，Ｃｏ－Ｍｎ－Ｎｉ－Ｒｕ－Ｏ四种厚膜热敏电阻材料的烧结过程，确定了各材料的最佳烧结温度，较全面地测试了文中各材料系列厚膜热敏电阻的特性参数，给出了元件的热老化特性，电阻－温度特性，伏安特性，时间常数，耗散系数等。     

溶胶—凝胶自燃烧法合成Ni—Zn铁氧体纳米粉末

将溶胶－凝胶法和自蔓延燃烧法相结合。开发了一种ｓｏｌ－ｇｅｌ自攻超细偻末合成技术,并合成了Ｎｉ－Ｚｎ铁氧体纳米粉末。结果表明,由硝酸盐和柠檬酸形成的凝胶具有自蔓延燃烧特性,燃烧后直接形成粒度为４０－５０ｎｍ,具有尖晶石结构的单相Ｎｉ－Ｚｎ铁氧体超细粉末。     

Effect of Permeable Crystalline Material on Steel Reinforcement Corrosion of Concrete

Permeable crystalline materialcan permeate into pores and cracks of concrete and catalyze the reaction between Ca(OH) 2and unhydrated cement to generate a great quantity needle non-soluble crystals, which can stop up the pores and cracks of concrete, and increase the impermeability of concrete. This paper reported the results of a study conducted to evaluate steel reinforcement corrosion of concrete specimens uncoated and coated with permeable crystalline material as well as mixed with the permeable crystalline material. The properties evaluated for corrosion test were water impermeability, water absorption, compressive strength and potential. The results of water impermeability, water absorption, compressive strength clearly showed that the permeable crystalline material could prohibit water, any soluble salts and moisture from penetrating the concrete to cause corrosion, leaking, and other problems, and it did increase the compressive strength, which was favorable for protection of corrosion of reinforcing steel. Moreover, it was concluded from the potential-time curve that the steel reinforcement of uncoated specimen was in the state of activation whereas that of other specimens coated and mixed with the permeable crystalline material was in the state of inactivation. Above all, it was indicated that the permeable crystalline materialis very effective to protect the steel reinforcement of concrete from corrosion.     

The Research and Application About "Dry Peeling Off" Technology for Airplane Surface Paint Layer

In this paper, the principle of spurting take off lacquer were introduced; and with orthogonal method the unsaturate polyester was prepared ;it was easy to peel airplane paint layer off with this material and equipment.     

Quality Study of Honeycomb Core Shaping Without Wax Stabilization

Sandwich panels utilizing honeycomb cores result in lightweight, high-strength units that are very rigid. Indeed, they give honeycomb panels the best strength-to-weight ratio of any construction type available. Conventionally, the wax is poured into the cell of the core to strengthen the structure and prevent the core from being crushed during milling. Much time and labor is required to wax, mill, and clean the cores. In this study, the process of pouring wax into the core was skipped. In other words, the cutter directly milled the core. Experiments showed that the compressive strength of the core produced without wax stabilization was only 3% lower than that of cores produced using the traditional method. In addition, the drum peel strengths of cores produced without wax stabilization were 38.4% higher than cores produced using the traditional method, in which residual wax seriously polluted the adhesive. It was also found that eliminating the wax process can reduce costs.     

In-process thermal treatment of polylactic acid in fused deposition modelling

Polylactic acid (PLA) is one of the most widely used open source fused filament fabrication materials due to its ease of extrusion, biodegradability, and mechanical strength. The mechanical strength of PLA largely depends on the proper growth of its semi-crystalline structure, which can be severely impaired by a low rate of crystallization, particularly in open source printers. This can be further aggravated by the non-uniform thermal distribution of heat that causes improper curing among the extruded beads of the printing material. As a result, PLA printed on open source printers does not achieve the best mechanical properties. This research, for the first time, proposes an additive-free solution implemented through a detailed set of experimentation to improve the curing rate through in-process temperature variations to cure the joints among the beads. Scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy is used to confirm the improvements in the bead joints. This work is conducted in two phases of experiments. In the first phase, a full factorial ANOVA is used to investigate various process parameters and the important variables are used in the second phase to print test specimens in four different sets.     

Investigation of the Corrosion Behaviors of HVOF-Sprayed Carbide Cernet Coatings in Molten Al-Zn-Si Alloy Bath

In continuous hot-dip galvanization process the corrosion and chemical stability of the sink roll in the galvanizing bath are important problem which effects on the quality and productivity. In order to protect the sink roll the carbide cermet and/or ceramic coatings were deposited on the surface of the sink roll. The WC-, Cr3 C2-cermet coatings were deposited by high velocity oxygen fuel (HVOF) spray, respectively. The coating samples were immersed in molten Zn-alloy containing 50 wt % aluminum at 833 K for 24 hr and 144 hr, respectively. The inter-diffusion and inter-reaction of Zn, Al and elements in coating and corrosion behaviors of these coatings were investigated by XRD, SEM and EPMA etc. The corrosion mechanisms of the carbide cermet coatings and ceramic coatings in molten High Al-Zn-alloy were approached.     

Fundamental study of adhesion of ice to cooling solid surface (Discussion on influence of copper oxide layer on ice adhesion force)

In many situations, ice often adheres to a cooling solid surface, frequently causing serious accidents. It is critical to clarify the mechanism of ice adhesion to the cooling surface in order to prevent ice adhesion. In a past study, the shearing stresses of two kinds of test plates with a copper surface having the higher thermal conductivity were measured. The shearing stress corresponds to ice adhesion force. Both shearing stresses were significantly different; however, the cause remains unclear.Therefore, the present study focuses on an oxide layer as the main factor causing the difference of both shearing stresses; the influence of the oxide layer formed on shearing stress was discussed. And in the removal and reformation processes of the oxide layer, the time variation of the shearing stress was clarified. Moreover, the relationship between the state of the copper surface and the shearing stress was also clarified by surface analysis.     

＂Three Transformations＂ and Standardization

During his inspection in Henan Province in May, Chinese President Xi Jinping stressed to ＂push forward the transformation from China Speed to China Quality, from Made in China to Created in China, and from Chinese Products to Chinese Brand＂. The ＂Three Transformations＂ are the specific requirements and goal of China＇s national development in the context that market should play a decisive role in the allocation of resources.     

重塑标准推行格局 推动LED照明的普及（英文）

正When you are enjoying the green,energy-saving and healthy lighting of IKEA LED luminaire,you may not realize that most of IKEA’s LED bulbs are produced by the LED luminaire smart manufacturing system of Hangzhou Zhongwei Photoelectricity CO.,LTD(ZVISION).No longer enclosed in the laboratory,the product standards are brought into the factory workshop and even to the entire production process.Thus,the standards are promoted and applied in a favorable way by enterprises,benefitting consumers with high quality products.     

Chinese Experts Contribute to ISO＇s New Toy Standards

正The international standard,ISO 8124-6,Safety of toys–Part 6:Certain phthalate esters in toys and children’s products,was officially issued by ISO worldwide on August 15.It was the first time for Chinese experts to lead the ISO standard development in toys industry.The standard was drafted by a group of Chinese experts from SAC/TC for toys and relevant Chinese departments and finally completed by a dedicated international group of experts.ISO 8124-6 makes a substantive breakthrough in the aspects of the scope of toys,limitation of plasticizer types,control of test cost,accuracy of test,operation convenience,etc.,offering the operational guidance for toy manufactures and testing laboratories.     

SAC Delegation Visits AENOR and Signs Cooperation Agreements

正SAC Administrator Tian Shihong led the Chinese delegation to visit the Spanish Association for Standardization and Certification(AENOR)on September 15,2014.Mrs.Begona Cristeto,the Vice-Minister of Industry,Energy and Tourism of Spain,and Mr.Avelino Brito,the President and CEO of AENOR greeted the delegation.The two sides had a deep and friendly discussion on strengthening the cooperation between China and Spain in the standardization field and promoting the standardization work to support the development of economy and trade in the two countries.