ZrO2氧敏陶瓷的工作机理与研究进展

ZrO2氧敏陶瓷在汽车发动机、电厂等燃烧设备、高温冶炼、环保与计量等方面有着重要的作用。本文综述了ZrO2氧敏陶瓷的导电与反应机理，指出了此浓差电池型材料在制备与应用过程中的影响因素，并对近年来ZrO2氧敏陶瓷材料的研究进展及存在的问题进行了分析，指出了发展方向。     

TiO2—Nb2O5复合氧化物氧敏响应特性及结构研究

将ＴｉＯ２和Ｎｂ２Ｏ５氧化物氧敏材料复合，研究氧敏响应特性及其与环境温度，气流转换频率的关系，并指出采样方法对响应时间的影响。在无贵金属催化条件下，烧结型复合氧敏材料的响应时间约为６０ｍｓ。对材料的结构与响应机理进行了分析与初步探讨。     

离子束辅助沉积制备TiO2—Nb2OT氧敏薄膜

采用离子束辅助沉积方法在Ａｌ２Ｏ３陶瓷衬底上制备了ＴｉＯ２－Ｎｂ２Ｏ５的氧敏薄膜。考察了薄膜组分比及退火温度对薄膜氧敏特性和结果的影响。电阻－氧分压特性测试结果表明，纯Ｎｂ２Ｏ５薄膜的氧敏特性优于纯ＴｉＯ２薄膜；掺入少量的Ｔｉ可使Ｎｂ２Ｏ５薄膜的氧敏特性提高，以５ｍｏｌ％ＴｉＯ２掺杂的Ｎｂ２Ｏ５薄膜最佳；     

Ti—Nb系复合氧化物的氧敏特性

由具有氧敏特性的ＴｉＯ２与Ｎｂ２Ｏ５形成的不含贵金属催化剂的复合材料，其氧分压特性，空燃比特性及温度特性的比单纯材料有明显改善。     

铂修饰LSM电极对ZrO2氧敏特性的影响

以固相反应合成La0．7Sr0．3MnO3和YSZ，采用密封材料封装烧结LSM和YSZ，丝网印刷LSM作电极，制备极限电流型氧传感器。在500℃测试氧敏元件极限电流随氧气浓度变化的响应。测试结果表明，LSM电极经Pt修饰后，提高了氧敏元件信号的稳定性，与相同条件制备的Pt电极信号差别不大。     

烟道用ZrO2氧敏传感器测氧的仪表化方程

本文提出一个新的烟道氧敏传感器测氧的仪表化方程，并给出方程中两个重要参数的标定方法。实测结果表明，用该方程可实现恒温测氧，且快速准确、方便实用，测量误差不大于０．０５％。     

TiO2基氧化物半导体氧敏传感器的研究开发进展

综合介绍TiO2基氧化物半导体氧敏传感器的研究发展历史和TiO2材料的特性,比较了各种氧敏机理、制备方法、传感器的氧敏特性,就制备方法－材料微观结构－氧敏性能关系中的几个重要问题,进行了深入的探讨,并对今后的研究开发与产业化,结合本课题组的研究工作,提出了几点建议。     

w^6＋掺杂TiO2纳米材料化学吸附与氧敏特性研究

以TiCl3为钛源，采用溶胶-凝胶法制备W^6＋掺杂TiO2纳米粉体，经400℃低温烧结1h，即可得到以金红石相为主相的TiO2基氧敏材料。采用XRD、BET、TPD等手段对其进行表征、分析，结果表明W^6＋掺杂有利于形成以金红石相为主相的晶体结构，使样品的晶粒尺寸减小、比表面积增加，使氧敏特性提高，其中12％（摩尔分数）W^6＋／TiO2的氧气化学吸附量最大，敏感层表面对氧气的活性最高；在低工作条件（115℃）及1×10^-4氧气下，W^6＋掺杂TiO2的厚膜型气敏元件氧敏特性得以明显提高，且掺杂12％（摩尔分数）W^6＋灵敏度最佳（S=16．5）。     

α-Ti3O5薄膜的制备及氧敏性能的研究

α－Ti3O5是TiOx材料中相对较稳定的晶型，是一种潜在的氧敏材料，与传统的TiO2,ZrO2材料相比，具有阻温特性好的优点。本文通过H2还原TiO2来制备α－Ti3O5薄膜，研究了不同还原温度和保温时间对薄膜晶相组成的影响以及薄膜的导电性、电阻－温度稳定性和在氧化气氛中的晶格稳定性，同时对α－Ti3O5薄膜的氧敏性能进行了初步研究。     

TiO_2基氧化物半导体氧敏传感器的研究开发进展

综合介绍 TiO2基氧化物半导体氧敏传感器的研究发展历史和 TiO2材料的特性,比较了各 种氧敏机理、制备方法、传感器的氧敏特性,就制备方法－材料微观结构－氧敏性能关系中的几 个重要问题,进行了深入的探讨,并对今后的研究开发与产业化,结合本课题组的研究工作,提出 了几点建议。     

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.     

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.     

中国质量(北京)大会(英文)

正Themed on"quality,innovation,development",the first China Quality Conference(Beijing)was held in the Great Hall of the People on September 15.Chinese Premier Li Keqiang delivered an important speech at the conference.State Councilor Yang Jing and Wang Yong attended the conference with over 600 domestic and international representatives from foreign,regional and international quality organizations     

National Working Meeting on Land and Resources Standardization

正The National Working Meeting on Land and Resources Standardization was held in Beijing on July 15,2014.Wang Min,the Deputy-Minister of the Ministry of Land and Resources,and Yin Minghan,the Chief-Engineer of SAC addressed the meeting.Representatives from relevant competent departments and technical committees were present.The meeting aims to summarize work,discuss existing problems and make clear working thoughts,promoting standardization work of land and resources to a new level.Wang Min pointed out that the standardization work of land and resources should be centered on the basic principles of"protecting land and resources dutifully,intensively and economically utilizing land and resources,and making all-out efforts to safeguard the public’s rights and interests",highlighted the