MOD法制备YBCO超导薄膜

论述了金属有机化合物热解法即ＭＯＤ法制备高温超导氧化物薄膜的优越性及可行性。详细介绍了以三氟乙酸盐为金属前驱物，用ＭＯＤ法制备ＹＢＣＯ超导薄膜的方法并对观察结果进行了分析讨论。在１０×１０×０．５ｍｍ￣３Ｚｒ（Ｙ）Ｏ＿２单晶抛光衬底上，用ＭＯＤ法成功地获得了Ｔ＿（ｃｏ）＝８２Ｋ的ＹＢＣＯ超导薄膜。     

铂（Ⅳ）－硫代米酮－吐温－80显色反应的研究及应用

研究了在非离子表活性剂Ｔｗｅｅｎ－８０存在下,Ｐｔ与硫代米酮（ＴＭＫ）的显色反应,试验结果表明．在ｐＨ３．４３～３．３４的ＨＡｃ介质中,Ｐｔ与ＴＭＫ生成稳定的紫红色络合物。λｍａｘ＝５２５～５３０ｎｍ,摩尔吸光系数ε＝１．６×１０￣５Ｌ·ｍｏｌ￣（－１）·ｍｏｌ￣（－１）·ｃｍ￣（－１）,０～１０μｇＰｔ／１０ｍｌ服从比尔定律。     

Y1—xDyxBa2Cu3O7—δ（x=0.03,0.05）超导薄膜制备及性能

叙述了用双靶直流磁控溅射仪制备Ｙ１－ｘＤｙｘＢａ２Ｃｕ３Ｏ７－δ（ｘ＝０．０３，０．０５）超导薄膜的工艺，按其工艺的薄膜Ｔｃ均大于８８Ｋ，随着ｘ值增加，Ｊｃ有上升趋势，ＸＲＤ，ＳＥＭ的结果表明镝掺杂膜有很好的ｃ轴取向，讨论了高温超导体钉扎机制。     

磁控溅射法制备YBa2Cu3O7—x双面超导薄膜

采用在直径中这柱状阴极磁控溅射装置和筒形加热器制备了高质量ＹＢａ２Ｃｕ３Ｏ７－ｘ双面超导薄膜。使用衬底为（００１）ＬａＡｌＯ３和（００１）ＹＳＺ。双面超导薄膜零电阻温度ＴＧ＝８９～９１Ｋ,临界电流密度ＪＣ≥１０＾６Ａ／ｃｍ＾２（７７Ｋ,零场下）,微波表面电阻ＲＳ〈１ｍΩ（７７Ｋ,１０ＧＨｚ）。对不同氧氩比下制备的双面膜进行了性能的比较。当Ｏ２：Ａｒ＝１：２．５,衬底温度在８００℃时,制备出了高质量     

微晶软磁合金的交流磁性能

对四种不同含量的Ｆｅ７４Ｃｕ１Ｍ３Ｓｉ１２．５Ｂ９．５（Ｍ＝Ｎｂ＋Ｍｏ）非晶试样进行了无磁场、纵向磁场、横向磁场的热处理。测量了试样的交流复值磁导率｜μ０．３｜、矫顽力｜Ｈｃ｜和铁心损耗Ｐｃ０．２。实验结果表明：Ｆｅ７４Ｃｕ１Ｎｂ３Ｓｉ１２．５Ｂ９．５的｜μ｜０．３随频率减小的趋势最小。Ｆｅ７４Ｃｕ１Ｎｂ２Ｍｏ１Ｓｉ１２．５Ｂ９．５的｜μ｜０．３值最大，｜Ｈｃ｜和Ｐｃ０２值最小。在几种磁场热处理方法中，无磁场热处理试样的｜μ｜０．３最大，｜Ｈｃ｜和Ｐｃ０２值最小。纵向磁场热处理试样的｜μ｜０．３值最小，｜Ｈｃ｜和Ｐｃ０２值最大     

用于微波器件的大面积YBCO超导薄膜

高质量大面积ＹＢＣＯ薄膜是用原位中空柱状阴极直流磁控溅射装置制备的，化学计量比的超导靶的内为１００ｍｍ，加热器有效面积５０×４０ｍｍ＾２。在３０×３０ｍｍ＾２的Ｚｒ（Ｙ）Ｏ２ＬａＡｌＯ３基片上沉积的ＹＢＣＯ薄膜的厚度均匀度为±６％，临界温度Ｔｃ＞８９Ｋ，Ｔｃ不均匀性在１％以上，△Ｔｃ在０．８～０．９之间，临界电流密度Ｊｃ为２．０～３．５×１０＾６Ａ／ｃｍ＾２，△Ｊｃ为１．０～１．５Ａ／ｃｍ＾２，微     

铁液中Al—N,Nb—N平衡的研究

采用取样法，在密封体系ＭｇＯ坩埚中研究了铁液中Ｎｌ－Ｎ，Ｎｂ－Ｎ反应平衡。得到氮在铁液中的溶解平衡常数１ｇＫ＝－１１０６／Ｔ－０．７７１ １ｇＫＡＩＮ＝－９９０９／Ｔ＋３．８１ △Ｇ＾０ＡＩＮ＝１８９８００－７３．０ＴＪ／ｍｏｌ，ｅＮ＾Ａ＾ｌ＝－０．５３０＋９３６／Ｔ１ｇＫＮｂＮ＝－３４７００／Ｔ＋１８．３７ △Ｇ＾０ＮｂＮ＝６６４６５０－３５２ＴＪ／ｍｏｌ，ｅ＾Ｎ＾ｂＮ＝０．０９０－２５８．８／     

钼的加入对A15Nb_3Al的超导临界温度T_c的影响

Ｍｅｉｓｅｉ大学的Ｋ .Ｙ .Ｈｗａｎｇ等人根据Ａ15Ｎｂ3Ａｌ系合金的超导临界温度Ｔｃ 随晶格参数减小而升高这一总趋势基础上研究了添加钼对Ａ15Ｎｂ3Ａｌ合金的Ｔｃ 的影响。随着钼含量的增加 ,Ａ15相的晶格参数单调递减 ,在加入Ｍｏ 2 %到 3.5% (摩尔分数 )时 ,Ｎｂ2 0 % (摩尔分数 )合金的Ｔｃ 高于不含钼的合金的超导临界温度Ｔｃ( 0 ) ,并于 2 %钼 (摩尔分数 )时达到峰值 14.8Ｋ ,它比Ｔｃ( 0 ) 大约高 2Ｋ。当钼含量高于 5% (摩尔分数 )时 ,钼对Ｎｂ3Ａｌ合金的Ｔｃ 强化作用消失。钼的加入对A15Nb_3Al的超导临界温度T_c的影响@吕雪丽     

用分割靶法制备Y_（1－x）Ho_xBa_2Cu_3O_（7－δ）超导薄膜

本文利用直流磁控溅射技术，在（１００）钇稳定的ＺｒＯ２基片上制备出ｃ轴取向很好的Ｙ１－ｘＨＯｘＢａ２Ｃｕ３Ｏ７－δ（０＜ｘ≤１）超导薄膜。实验中所用的靶材由ＹＢＣＯ和ＨＢＣＯ超导材料各一半组成。随着ＨＢＣＯ靶材到加热器距离的变化，钬的含量发生变化，当ｘ＝０．７（原子比），零电阻温度Ｔ∞＞８３Ｋ。     

NbTi超导体的新进展：（Ⅰ）常规NbTi超导体

ＮｂＴｉ超导体由于具有良好的机械、加工性能和超导性能,因此已得到了广泛应用。临界电流密度Ｊｃ是超导体应用过程中最主要的技术指标之一,因此提高ＮｂＴｉ超导体的临界电流密度Ｊｃ一直是ＮｂＴｉ超导体研究的热点。理论研究表明 ［１］,ＮｂＴｉ超导体的去偶电流密度极限约为１０~９Ａ／ｃｍ~２（５Ｔ,４．２Ｋ）,然而目前实用ＮｂＴｉ超导线的Ｊｃ仅为３×１０~５Ａ／ｃｍ~２（５Ｔ,４．２Ｋ）。通过将ＮｂＴｉ超导体制成带材及多层薄膜导体,其Ｊｃ可达到这一理论极限的 ５％～ ２０％［２,３］。因此 ＮｂＴｉ超导体的研究主…     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

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.