氧氮比对真空电弧沉积TiO_(2-x)N_x薄膜结构和性能的影响

采用真空电弧沉积技术在玻璃上制备了N掺杂TiO2复合薄膜。通过X射线电子能谱(XPS)、X射线衍射(XRD)、紫外可见光谱(UV-Vis)等测试技术研究了沉积过程中氧氮比对TiO2-xNx薄膜结构和性能的影响。实验结果表明,经500℃退火后的TiO2-xNx薄膜均为锐钛矿相,N原子在TiO2网络结构中以取代O原子的形式存在。TiO2-xNx复合薄膜在400～800 nm可见光区的透过率达60%,随着氮含量的增加,吸收边发生红移。在可见光下对酸性品红的降解表明TiO2-xNx薄膜具有可见光活性,随氧氮比的降低可见光催化活性逐渐增强。经自然光照射2 h,不同氧氮比制备的TiO2-xNx薄膜对大肠杆菌、金黄葡萄球菌的杀菌率均达99%以上。     

溅射气压对WO_3薄膜电致变色器件性能的影响

采用磁控溅射法,以溅射气压为变量,在ITO导电玻璃上制备了WO3薄膜及TiO2薄膜,将Li+聚合物电解质涂覆于这两种薄膜之间封装成固态电致变色器件。采用XRD、AFM对WO3薄膜进行结构表征和形貌观察;采用直流稳压电源对器件进行电致变色测试,并以分光光度计测定其着色/褪色态可见光透过率。结果表明:1.5Pa溅射气压下原位沉积WO3薄膜含较多的金属W;2.0~3.0Pa溅射气压下得到了非晶态WO3薄膜;2.0Pa溅射气压下得到的WO3薄膜表面分布有狭长的颗粒团簇,表面积较大,便于着色或褪色时Li+与电子的注入或脱出,故其所封装器件的调制幅度最大,响应最快;随溅射气压的增大,WO3薄膜表面缺陷增多,器件变色性能恶化。     

工艺条件对直流磁控溅射沉积ITO薄膜光电特性的影响

研究了采用直流磁控溅射法制备ITO透明导电膜时温度、靶材、氧压比、溅射气压、溅射速率等工艺条件对ITO膜电阻率和可见光透过率等光电特性的影响。实验结果表明,用ITO陶瓷靶溅射镀膜要比In-Sn合金靶好,特别是在电阻率上,前者要低一个数量级左右;并由实验结果得到,当温度330℃,氧氩比1/40,溅射气压0.45 Pa和溅射速率23 nm.min-1左右时,可获得薄膜电阻率1.8×10-4Ω.cm,可见光透过率80%以上的最佳光电特性参数。     

Fe离子注入二氧化钛复合薄膜制备及光吸收性能研究

采用溶胶凝胶法在石英基体上制备了纯TiO2薄膜,并通过离子注入方法对TiO2薄膜进行Fe掺杂改性以促进TiO2薄膜光吸收边红移,提高其光吸收性能。利用XRD、XPS及UV-vis对不同注入剂量的Fe掺杂TiO2复合薄膜的晶相结构、原子化学态以及光吸收性能进行了表征。XRD测试结果表明,溶胶凝胶法制得的TiO2薄膜为锐钛矿相,经Fe离子注入后,复合TiO2薄膜经退火后锐钛矿相消失,金红石相出现,因为Fe3+离子进入晶胞代替Ti4+,在TiO2基体形成铁的固溶体,结果氧空缺形成促进了TiO2从锐钛矿向金红石的转变;XPS测试结果表明,经过退火Fe在复合TiO2薄膜中以Fe和Fe3O4形式存在,说明Fe离子进入TiO2晶格取代Ti,但Fe及其氧化物晶体峰未在XRD上观测到,说明两者结晶程度不高,以非晶形态存在;通过对溶胶凝胶法制备的TiO2薄膜注入不同剂量Fe的复合薄膜的紫外-可见吸收光谱分析可知,由于复合薄膜中Fe3O4的存在,使复合薄膜紫外-可见光吸收边发生了红移,并随注入剂量增加红移增大,根据红移效果确定Fe的适宜注入剂量为1×1017 cm-2。     

Fe3+掺杂对TiO2材料光催化活性的影响

采用溶胶-凝胶法制备了TiO2粉末,讨论了不同Fe3+掺杂浓度对TiO2光催化活性的影响,并采用XRD、UV-VIS检测技术对其进行了表征.结果表明,Fe3+掺杂能够显著的提高TiO2薄膜的光催化活性,最佳掺杂浓度为6.04×1016个·cm-3,且随着TiO2光催化活性的提高,薄膜的吸收带边发生了明显的红移,提高了可见光的利用率.XRD分析表明,Fe3+的掺杂使锐钛矿相TiO2的粒径明显减小,锐钛矿相含量明显增加.     

磁控溅射工艺参数对TiAlN薄膜结构和性能影响规律研究

采用XRD、SEM、纳米压痕仪、纳米划痕仪等分析了磁控溅射工艺参数对TiAlN薄膜物相、微观组织、力学性能及结合力的影响规律。结果表明，所有样品生成相均为面心立方的TiAlN,且在(111)晶面择优生长，薄膜表面形成三棱锥状密排晶粒。选定硬度与结合力两个指标对TiAlN薄膜进行评价，通过正交实验发现，硬度与结合力的最优工艺参数均为基底偏压-100 V,工作气压0.3 Pa,溅射电流8 A,氮流量40 sccm。     

反应溅射法在蓝宝石衬底上制备CeO2缓冲层

用金属铈作为靶材,采用射频反应磁控溅射法在（1 102）蓝宝石衬底上制备C轴取向CeO2外延薄膜缓冲层。结果表明在温度低于450℃或溅射功率低于50 W的条件下CeO2薄膜呈（111）取向生长;升高温度和功率CeO2薄膜的（111）取向减弱,（002）取向增强;在温度高于750℃或溅射功率高于120 W条件下CeO2薄膜呈（111）取向和（002）取向混合生长。结合X射线衍射仪和原子力显微镜表征CeO2薄膜的结构和表面形貌,获得在最优化条件下（衬底温度在680℃左右,溅射功率在80 W左右,溅射气压在25 Pa,氩氧比在15∶1）制备的CeO2薄膜具有优良的面内面外取向和平整的表面。     

射频磁控溅射法制备(100)择优取向Ba0.7Sr0.3TiO3薄膜

用射频磁控溅射法在快速热处理过的Pt／Ti/SiO2/Si（100）基体上制备了Ba0.7sr0.3TiO3薄膜。通过引入溅射因子α，在相同工艺条件（高温大功率溅射）下，对靶材成分进行调整，使薄膜成分无化学计量比偏离。薄膜成相较未调整前有显著改善，低角区的衍射杂峰消失。{100}方向有择优生长，同体材料及sol-gel法制备的BST薄膜有明显不同，研究认为是成分调整后，薄膜成分无偏离所致。     

TiN薄膜沉积条件对组织结构和结合力的影响

在不同沉积时间和基板温度下,采用反应磁控溅射的方法在Ti6Al4V基板上沉积Ti N薄膜,溅射过程中固定溅射总压、溅射功率、氮氩流量比等沉积条件.利用XRD、SEM分别研究了薄膜的微观结构和表面、截面形貌,利用显微硬度仪和划痕仪分别测量了薄膜的硬度和膜基结合力.研究结果表明:随着沉积时间的增加,薄膜硬度和膜基结合力均有增大趋势;随着基板温度的升高,Ti N薄膜择优取向由(111)转向(200)晶面,表面形貌由三角锥转变为片层状,硬度和膜基结合力均呈现升高趋势.     

轧制变形量及退火工艺对钼靶材显微组织的影响

钼靶材作为制备钼薄膜的溅射源,其致密性、纯度、粒径及取向分布决定溅射薄膜的品质与性能。为了确定钼靶材轧制的最佳工艺,将钼靶材在60%～90%变形量下以不同工艺条件轧制,并在900～1200℃下以不同温度退火,然后采用精密测量、金相观察、扫描电镜成像（SEM）、 X射线衍射（XRD）、电子背散射衍射（EBSD）等方法表征钼靶成品的理化性能和组织结构,并分析和讨论钼靶材的致密度、晶粒度以及结晶取向等特征关系。结果表明,当轧制变形量为80%～85%时,钼靶致密度达到99.8%,经过1000℃真空退火后,组织均匀性最佳,测得平均晶粒尺寸为57.1μm,同时靶面呈现出显著的{100}晶面择优取向。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.