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| 1 | Atmospheric Corrosion of Copper Exposed in a Simulated Coastal-Industrial Atmosphere显示文摘The corrosion behavior of copper exposed in a simulated coastal-industrial atmosphere has been investigated using weight loss measurement, scanning electron microscopy, X-ray diffraction, potentiodynamic polarization and in-situ electrochemical impedance spectroscopy(EIS) with micro-distance electrodes.The results show that corrosion kinetics follows the empirical equation D = Atn. The main corrosion products are composed of Cu_2O, Cu_2Cl(OH)_3 and Cu_4Cl_2(OH)_6. A two-layer structure comprising a loose outer layer and a compact inner layer forms the corrosion products during corrosion process. SO_2 has been found to promote the formation of Cu_4Cl_2(OH)_6. | Chen Pan Wangyan Lv Zhenyao Wang Wei Su Chuan Wang Shinian Liu | 2017 | Journal of Materials Science & Technology2017，33，6： | 6 |
| 2 | A design study on the CSNS LEBT pre-chopper显示文摘The China Spallation Neutron Source (CSNS) front end incorporates a pre-chopper in the Low Energy Beam Transport line (LEBT) that will remove a 530 ns section of beam at approximately 1 MHz rate, which is the RF frequency of the ring at injection. It's one of the most critical devices for properly controlling the injecting beam loss. Physical designing of the pre-chopper is carried out, and the RFQ itself is used as the beam dump of the chopper system. In order to examine the reliability of the pre-chopper design, the beam study of a similar chopper system is successfully performed. The results of physical design and experiments are presented. | LIU HuaChang OUYANG HuaFu PENG Jun HUANG Tao GONG KeYun XU TaoGuang FU ShiNian | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，S2： | 3 |
| 3 | The R&D status of DTL for CSNS显示文摘The China Spallation Neutron Source (CSNS) is a spallation neutron research facility being built at Dongguan in Guangdong Province. The 324 MHz Alvarez-type Drift Tube Linac will be used to accelerate the H- ion beam from 3 to 80.0 MeV with peak current 15 mA. The R&D of a prototype structure at the low energy section of DTL is taking place at IHEP. The first unit tank ~2.8 m in length and 28 drift tubes containing electromagnetic quadrupoles are developed. The SAKAE coils are applied in the fabrication of the electromagnetic quadrupoles. This paper introduces the R&D status of the tank and 28 drift tubes. The fabrication process and measurement results of the electromagnetic quadrupoles of special interest are also presented. | YIN XueJun GONG KeYun PENG Jun SONG Hong XIAO YongChuan LI AHong LIU Lei FU ShiNian | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，S2： | 3 |
| 4 | THE CHARACTERISTICS OF GEOLOGICAL GENERAL FIELD OF VOLCANIC BELT IN LANCANG RIFT VALLEY AND ITS SIGNIFICANCE FOR EXPLORATION显示文摘Based on the theory of dissipative structures and moving character-parameters of elements,this paper examines the characteristics of the geological general field of volcanic belt in the Lancang rift valley,west Yunnan,China-with an open system and lower pressure environment,the volcanic belt is characterized by a large scale continuously graduating dissipative structure and three orders of concentrated minerogenetic material fields,and by the energy fields that influence the time and space structure of material fields.The research shows that the third order minerogenetic material fields which surround volcanic eruptive centers and have hydrothermal superposition and reconstruction after the magma stage possess favorable prognosis targets for copper polymetal. | Liu Shinian Duan Jiarui Wang Zhenrun Chen Xihua Wu Yanzhi | 1992 | Transactions of Nonferrous Metals Society of China1992，2，1： | 0 |
| 5 | Ce-Ti catalysts modified with copper and vanadium to effectively remove slip NH_(3) and NO_x from coal-fired plants显示文摘In this work,V/Ce-Ti catalysts were modified with different kinds of transition metals(Cu,Fe,Co,Mn) by sol-gel and impregnation methods.The NH_(3) oxidation performance of them was tested to select the most active catalyst in NH_(3)-selective catalytic oxidation(NH_(3)-SCO).The effect of NO,SO_(2) and H_(2)O was also investigated.The experimental results indicate that 1% Cu-V/Ce-Ti catalyst exhibits the most significant ability to remove slip ammonia discharged from coal-fired plants and its NH_(3) conversion efficiency reaches90% at 300℃.In additio n,97% NO_x can be removed when NO is introduced in the gas.Cu-V/Ce-Ti catalyst also obtains good resistance to H_(2)O and SO_(2).Based on the characterization experiment,the introduced Cu and V are highly dispersed on Ce-Ti catalyst and they can increase the redox properties and the number of acidic sites.Besides,the redox cycles among Cu,V and Ce species on Cu-V/Ce-Ti catalyst surface are conducive to generating more active oxygen and promoting the oxidation capacity of the catalyst. | Wenjie Liu Yifei Long Shinian Liu Yongyan Zhou Xin Tong Yajie Yin Xiaoyi Li Kang Hu Jiangjun Hu | 2023 | Journal of Rare Earths2023，41，7： | 0 |
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