Neutronic Comparison of Tritium－Breeding Performance of Candidate Tritium－Breeding Materials

Tritium self-sustainment, which will meet the fuel requirement of fusion reactor, is one of the key issues of fusion power development. The tritium breeding performances of various tritium-breeding materials are compared based on a series of neutronics calculations using three-dimensional Monte Carlo neutron-photon transport code MCNP/4C with the IAEA FENDL-2 data library. The effects of the dimensions of the tritium-breeding zone and the enrichment of 6Li on Tritium Breeding Ratio (TBR) are analyzed. The effects of Be as a neutron multiplier on TBR are also calculated.     

Superior integrated field emission cathode with ultralow turn-on field and high stability based on SiC nanocone arrays

Low turn-on field (E_to) and stable electron emission are two of key parameters for reliable application of field emission (FE) cathodes. In the present work, we developed a novel high-performance integrated field emission cathode based on well-aligned SiC nanocone arrays via an electrochemical etching approach. The etched SiC nanocone emitters and the underlying remaining SiC wafer are designed into a single-crystalline integrated architecture without interfaces, which favors cathodes with a sturdy configuration to resist Joule heat during long period electron emission process and structural failure caused by the existed strong electrostatic forces. Accordingly, the E_to of the integrated SiC cathode is reduced to 0.32 V/μm, which is the lowest value among all the previously reported SiC nanostructured emitters. In addition, the integrated cathode presented superior stability with an electron emission fluctuation of 3.3% over 10 h. This work provides a new perspective for designing and fabricating advanced FE cathodes for further promising applications in harsh working conditions with high performance.     

不溶性硫黄热稳定性和微观结构及其在轮胎带束层胶中应用的研究

用差示扫描量热(DSC)熔点法评价国产与进口不溶性硫黄(IS)的热稳定性,用扫描电子显微镜(SEM)观察IS及其在橡胶中的微观结构和分散状态,进行IS在轮胎带束层胶中的应用试验。结果表明:国产IS的热稳定性比进口IS差,灰分含量较高;IS在橡胶中的分散性与其微观结构相关,国产IS为块状紧密结构,进口IS为片状疏松多孔结构,在橡胶中的分散效果较好;国产IS带束层胶物理性能和粘合性能略优于进口IS带束层胶;采用国产IS带束层胶制备的轮胎高速性能和耐久性能均优于采用进口IS带束层胶制备的轮胎。     

天然气全自动隧道窑的烘烤与调试

本文主要介绍了天然气全自动隧道窑的调试步骤及烘烤的注意事项。     

现代日用瓷隧道窑的建造与安装

窑炉是陶瓷行业大型的热工设备.投资大、涉及面广、施工中交叉工程多.窑炉的建筑安装是窑炉的设计思想在窑炉实际生产中的体现.窑炉建筑安装质量的好坏不仅关系到窑炉的工艺布置是否合理,而且事关整条生产线的早日投产、经济运行和增产增收.所以窑炉建筑安装中的各项技术参数和施工步骤就显得极为重要.本文主要介绍了现代日用瓷隧道窑的制作与安装,依照窑炉建筑设计的各项参数进行施工,就能保证窑炉的安全运行.     

从四氢呋喃－乙酸乙酯－水三元混合物系中分离四氢呋喃的研究

阐述了以水解、液－液萃取、间歇精馏为手段从四氢呋喃、乙酸乙酯、水三元混合物系中分离四氢呋喃的方法．四氢呋喃的纯度超过９８％，收率６１．８％．     

B204型低变催化剂硫中毒的研究

对Ｂ２０４型低变催化剂进行了耐硫性能的研究。考察了不同硫化物、不同催化剂粒度对硫中毒的影响。通过Ｘ一射线衍射晶相分析对催化剂的硫中毒机理作了初步的探讨，得出毒物首先与催化剂非活性组份氧化锌作用的结论。     

带有有限带宽光增益和损耗项的扩充的非线性Schrodinger方程的孤立波解

本文利用基于双线性算符的广田法给出了带有有限带宽光增益和损耗项的非线性Ｓｃｈｒｏｄｉｎｇｅｒ方程的孤立波解，结果表明，通过适当地选取光增益谱和光纤色散参数，孤子自频移和三阶色散能够完全得到补偿，这对实现超高码率（＞１００Ｇｂｉｔ／ｓ）的光传输系统具有重要的意义。     

深层致密砂岩气藏高异常破裂压力影响因素分析

川西坳陷深层气藏具有超埋深、超高压、圈闭形成历史复杂等特征,压裂施工难度大。现有压裂及测试资料表明该套地层存在高异常破裂压力。通过对可能引起致密砂岩储层高异常破裂压力的影响因素研究后发现,导致高破裂压力的因素主要有地质因素和工程因素,如储层致密、岩石中含有较多黏土矿物及层状、网状、斑状碳质层、地层超压、钻井诱导井眼附近应力场畸变、流体能量损失等。研究结果可为今后在该地区开展储层压裂改造提供参考。