Transition Temperature of Bi_2Sr_2CaCu_2O_(8+x) Superconducting Films Prepared from Commercial Precursors

This paper have made a systematic study of the superconducting Bi-2212 phase transition temperature, which has a transition temperature (Tc) around 80-93 K, and depends on precise control of synthesis conditions, mainly including heat treatment parameters, oxygen partial pressure, and annealing temperature. Partial melting of the sample during preparation helps to raise its Tc. To elucidate the origin of this strong effect, the samples were heated with different melting process. The rapid changes in Tc valu...     

Relationship between microstructure characteristics for coal & coke and quality of coke

The coal petrography of 13 different rank single coals and the quality of cokes made on 40 kg pilot coke oven were measured and analyzed in the paper.The results indicated that the relationship between optical texture index of coke(OTI) and vitrinite mean maximum reflectance of single coal was positive linear correlation.By multiple linear regression analysis,the quantitative relationship between vitrinite reflectance distribution and the component of coke optical texture were determined;The influence of...     

Brief of the technology using sliding gate for slag stopping during converter tapping in the steelmaking plant of Baoshan Iron & Steel Co.,Ltd.

The sliding gate used to stop slag during converter tapping is similar to the control of slide gate in ladle,with the sliding gate device installed outside the BOF tapping hole tip.Owing to the quick opening and closing(in 0.5 s) of the sliding gate,it can not only effectively stop the pre - slag and post - slag during converter tapping but also automatically judge and stop slag with the help of AMEPA slag detecting and PLC control technology.Currently it is regarded as the best process to stop slag during converter tapping.     

Thermomechanical controlled processing of hot-rolled multiphase steel containing Nb

Influence of thermo-mechanical controlled processing(TMCP),including two-stage rolling with laminar cooling,air cooling and ultra-fast cooling,on the microstructure and mechanical properties of three kinds of Nb-microalloeyed steels was investigated by hot-rolling experiment.Effect of chemistry compositions and microstructure on mechanical properties and the relationship between the multiphase microstructure' s formation with TMCP were analyzed.The results showed that the mixed microstructure containing ...     

The analysis and control methods of profile irregular on 1580 mm hot rolling mill

The profile quality of hot strip will affect the quality of cold strip,therefore,it is one of key quality fields which needs improve.In this paper,three kinds of profile irregular defects of hot rolling strip were discussed based on the production experience.Through profile,rolling,work-roll's wear and simulation methods,this paper discovered the reasons of these quality defects.Meanwhile,the ways to deal with these defects were presented and have been proved effectively.Decrease the number of narrow str...     

Thermal spray coating on conductor rolls in electroplating line

In electroplating lines,many conductor rolls are installed in electroplating bath.Typical electroplatings are tin plating(ETL) and zinc plating(EGL),and from required product qualities,a vertical cell for the former and a horizontal cell for the latter is often used.Generally,chrome plating or WC cermet thermal spray coating is applied to stainless steel conductor roll in ETL for prolonging service life by improvement of wear resistance and corrosion resistance.On the other hand,Hastelloy type alloy subs...     

李晶老玉帽花的华丽转身

钻石、彩色宝石围绕老玉帽花，精湛工艺铺陈惊艳奢华，这一刹那的华丽转身宛如留住了那已经消失的时代记忆。     

钻石训练法

是否有一种训练方法能够轻松地减掉脂肪，塑造出完美的肌肉曲线昵？如果你有这样的困惑。那你可以试一试NIKEFREEHAVEN为你带来的“钻石训练法”。     

adidas STUPIDLY LIGHT 移动飓风

追求轻质已经成为球鞋界的共识。对于追求轻质极限，阿迪达斯总是首当其冲。而刚刚诞生的STUPIDLY LIGHT告诉我们，阿迪达斯追求轻质就是如此的直白。     

钻石女王真我风采

有一种美叫作“浑然天成”。查理兹·塞隆（Charlize Theron）的美就是如此。 这位全球最具诱惑力的女人，仿佛一粒毋须雕琢就会璀璨夺目的钻石，不需要任何修饰，淡然地回眸一笑，便能吸人魂魄