原电池沉积技术工艺条件对SrMoO4薄膜结构与形貌的影响

室温下,在Sr(OH)2溶液中采用原电池方法直接制备了高晶态SrMoO4薄膜.通过XRD和SEM技术系统探讨了反应时间、溶液pH值和外加氧化剂等工艺条件对制备的SrMoO4薄膜的结晶性和表面形貌的影响.结果表明,电化学反应时间、溶液pH值和外加氧化剂对SrMoO4薄膜的晶体结构和表面形貌具有重要的影响:随着反应时间的增加,薄膜的结晶性和形貌会改善;在较高的溶液pH值条件下,SrMoO4晶粒沿c轴择优生长;当加入适量的过氧化氢氧化剂时,可加快SrMoO4晶粒的生长,但会产生团聚现象.     

一个片流过程控制的冲积扇——-太原盆地风峪沟冲积扇

风峪沟冲积扇位于太原盆地西北侧,面积较大,平面形态十分开阔。野外考察表明,在该冲积扇顶部出露了典型的、具平行层理结构的沉积物剖面。说明该冲积扇主要由高流态的片流过程形成的。片流沉积物由厚度小、侧向延伸长的中、细砾石坝沉积物和相对粒度较细的坝间沉积物所组成。风峪沟冲积扇流域的地质地貌特征表明,由于该段吕梁山地较大幅度的抬升给冲积扇的发育提供了充分的可容空间,这可能是风峪沟冲积扇上片流沉积物发育的主要原因。     

相控随机建模在油藏精细描述中的应用研究

针对辽河油田曙四区杜家台油藏开发现状及地质研究的难点,根据沉积学原理和测井相定量分析方法开展了微相研究,利用沉积微相研究成果约束储层参数的空间分布,建立起精细储层地质模型,解决了建模过程中沉积相研究成果与储层参数分布无法有效结合的缺陷,成功地实现了辽河油田曙四区杜家台油藏精细描述,实践证明该方法切实可行。相控随机建模不仅可以提供较准确的储层属性模型,而且为剩余油研究和油气开发调整提供了地质依据。     

四川盆地西部海相碎屑岩-陆相碎屑岩的转换过程

四川盆地是一个叠合盆地,经历了海相碳酸盐岩到海相碎屑岩、海相碎屑岩到陆相碎屑岩的转换和变迁.这两个转换过程最终结束均发生在四川盆地西部.海相碎屑岩到陆相碎屑岩的转换发生在晚三叠世末,相对应的地层单位为上三叠统须家河组.通过对须家河组厚度和沉积相变化,以及龙门山前砾岩的分布特征研究,认为这一转换主要发生于须家河组沉积末期(T_3x~4-T_3x~6),时间上随地区不同而不同,空间上具有由北往南的先后顺序.这揭示龙门山造山带的造山隆升过程具有由北往南的特点.这一转换过程导致川西前陆盆地内南、北段油气地质条件存在差异.寻找河口沙坝、三角洲平原河道砂等形成的优质储层应是须家河组油气勘探的关键.     

400-1100nm波段用于格兰泰勒棱镜减反射膜的研制

为提高格兰泰勒棱镜的透射率和使用带宽,研究了400-1100nm超宽带减反射膜的设计、制备．利用数值优化技术设计了多层膜;采用沉积Al2O3为过渡层的方法,提高了薄膜和晶体的附着力．用电子束沉积和离子束辅助沉积的方法制备了多层减反射膜．采用石英晶体振荡法监控膜厚和沉积速率．测量结果表明平均剩余反射率均小于1．7％．测试薄膜与冰洲石晶体的附着力性能良好．     

DEM/CFD modelling of the deposition of dilute granular systems in a vertical container

Deposition of granular materials into a container is a general industrial packing process. In this study, the deposition behaviour of dilute granular mixtures consisting of two types of particles that were of the same particle size but different particle densities in the presence of air was numerically analyzed using a coupled discrete element method （DEM） and computational fluid dynamics （CFD）. Bilayer granular mixtures with light particles at bottom and heavy particles at top were first simulated. It was found that the presence of air significantly affected the flow behaviour of the bilayer mixtures. For the system with a relatively low initial void fraction, the air entrapped inside the container escaped through the dilated zones induced due to the friction between the powder bed and wall surfaces. The escaping air streams entrained light particles that were originally located at the bottom of the granular system. Consequently, these light particles were migrated to the top of the granular bed at the end of deposition process. More light particles were migrated when the deposition distance was increased. For the system with a high initial void fraction, some light particles penetrated into the top layer of heavy particles and created a mixing zone. Deposition of random mixtures with different initial void fractions was also investigated and the influence of initial void fraction on the segregation behaviour was explored as well. It was found that the increase of void fraction promoted segregation during the deposition in air. It was demonstrated that, for granular mixtures consisting of particles of different air sensitivities, the presence of air had a significant impact on the mixing and segregation behaviour during the deposition.     

Occurrence of perfluoroalkyl acids in precipitation from Shenyang, China

Perfluorosulfonates （PFSAs） and perfluorocarboxylates （PFCAs） in precipitation collected from Shenyang, China were determined. Snow samples were collected in the snow event on March 4, 2007 from 34 sites involving both the urban and suburban areas in Shenyang. The snowmelt was preconcentrated by solid phase extraction and analyzed using LC-MS method. Measurable amounts of perfluoroalkyl acids （PFAS） were found in precipitation samples from Shenyang, demonstrating that wet deposition is one possible pathway for the removing of the selected PFAS chemicals from atmosphere. Major PFAS detected were PFOS （〈0.38-51 ng/L）, PFOA （0.82-13 ng/L） and PFHpA （0.76-11 ng/L）, with their mean concentration of 5.4, 3.3 and 2.9 ng/L, respectively. Other PFSAs and PFCAs were detected at much lower frequency or below the limit of detection in all the samples. The work presented here offers some basis for the investigation on the environmental behavior and the evaluation of human exposure to PFAS.     

川西坳陷什邡-德阳-广金地区蓬莱镇组致密储层成岩相表征

利用铸体薄片、扫描电镜、岩心观察等资料,对川西坳陷蓬莱镇组储层成岩相类型进行划分,建立成岩相测井识别标准,研究区蓬莱镇组成岩相展布、不同成岩相物性、成岩相主控因素。结果表明,将研究区储层划分为溶蚀孔隙成岩相、斑状溶蚀孔隙成岩相、致密胶结成岩相和致密压实成岩相四种成岩相类型;选取深浅侧向、自然伽马、声波时差、密度和补偿中子6条测井曲线,建立了四种成岩相的测井识别标准。以MJ102井为例实现成岩相的剖面划分;并以蓬三段三砂组的成岩相平面展布与沉积相图对比研究。揭示成岩相的分布主要受沉积环境控制;且溶蚀孔隙成岩相和斑状溶蚀孔隙成岩相物性最好,主要发育在分流河道微相中。     

大尺寸多层喷射沉积6066Al/SiC_p/Gr复合材料管坯的制备

采用多层喷射沉积技术与双喷嘴雾化系统制备了外径为 6 5 0mm ,内径为 30 0mm ,长为 80 0mm的大尺寸6 0 6 6Al/SiCp/Gr颗粒增强复合材料管坯 ,并成功挤压外径为 35 0mm ,内径为 2 5 0mm的管材 .在大尺寸管坯制备工艺中 ,喷射距离较短 ,金属液流率较大 ,以保证喷射流具有较高液相比例 ,与固相沉积坯表面结合良好 ,避免层间开裂 .与传统喷射沉积工艺相比 ,多层喷射沉积复合材料坯冷速较高 ,但致密度稍低 ,平均致密度约为 (88± 3) % .采用双环复合雾化器结构以粉包液的方式在雾化前加入增强颗粒 ,操作简单 ,影响工艺因素少 ,能实现增强颗粒的均匀连续加入 ,适用于大尺寸喷射沉积复合材料的连续制备 .分析了多层喷射沉积大型管坯制备工艺中有待解决的一些问题 ,为工业化制备大尺寸喷射沉积复合材料奠定了实验基础     

N~ 离子束注入庆大霉素产生菌诱变效应研究

用 30kV ,剂量 1 .0× 1 0 1 5ions/cm2 ～ 5.0× 1 0 1 6ions/cm2 的N 离子注入庆大霉素产生菌成熟孢子后 ,作出菌种的存活率曲线 ,为典型的“马鞍型”剂量 -效应曲线 .围绕存活率曲线的峰值区域选取最佳注入剂量对菌种进行诱变育种 ,经筛选得到了高产抗突变菌种 ,摇瓶发酵表明其产抗能力可提高 2 7.39% ,成果显著 .