碳氧比能谱测井在克拉玛依油田的应用

打碳氧比能谱测外资料和动静态资料结合进行综合分析,在克拉玛依油田的探井油气层评价、观察井动态监测、开发井水淹层评价等方面取得了明显的效果。     

新显色剂AAATP的合成及其与钯的显色反应研究

本文报道了新显色剂２－（４－安替比林偶氮）－４－甲基－５－氨基苯膦酸的合成及其在分析上的应用。试验结果表明,在强酸性溶液中,试剂仅与钯形成络合比为１：２的红色可溶性的稳定配合物,其最大吸收波长为５２５ｎｍ,表现摩尔吸光系数为５,５×１０￣４Ｌ·ｍｏｌ￣－１·ｃｍ￣－１,钯浓度在０～３５μｇ／２５ｍｌ范围内遵守比尔定律。试剂对钯具有高选择性,所拟方法简便、快速,不经分离即可直接进行含钯试样的分析,结果满意。     

新叠氮试剂QTBAS与铜、钴、镍离子显色反应的研究

新叠氮试剂ＡＴＢＡＳ在ＮａｏＨ－Ｎａ_２Ｂ_４Ｏ_７（ｐＨ１０．０）的缓冲溶液中,在表面活性剂ＣＴＭＡＢ存在下,能与铜、钴、镍离了发生显色反应。ＱＴＢＡＳ在此条件下最大吸收峰位于４５０ＮＭ,与铜离子形成紫红色的络合物,其最大吸收波长为５８５ｎｍ,表现摩尔吸光系数εＣｕ＝６．９４×１０~４;与钴、镍离子形成蓝色络合物,其最大吸收波长均为５９５ｎｍ,其表现摩尔吸光系数εＣｏ＝６．３３×１０~４和εＮｉ＝５．２２×１０~４．研究了该显色反应发生的条件及同时测定了两干扰组分的含量,考察了其它常见阴阳干扰离子的影响     

低压系统的残余电流保护

本文对电气工作者经常接触的低压系统,从安全角度出发,按IEC制定的TT、TN、IT方式进行了简要的分析比较,并对采用残余电流保护装置(简称RCD)的原理和一些应用上的问题进行了阐述,为合理使用提出了建议。     

碱性染料显色剂在矿冶分析中的应用

本文评述了近年来碱性染料显色剂在矿冶分析中应用的发展状况,显色反应的条件,以及相应光度分析方法的检测限和应用等,参考文献58篇。     

白云鄂博主东矿中贫氧化矿铌资源的特点及综合回收

包头白云鄂博主东矿中贫氧化矿中铌有很大的回收价值,本文探讨了主要铌矿物的特点及选矿性质,认为弱磁—强磁是初步富集铌的有效途径。本文还较为详细地介绍了从强磁中矿的稀土浮选尾矿回收铌得到富铌铁精矿的若干浮选工艺条件及浮选药剂。     

一种经改进的测定有机试剂中微量水方法

采用气相色谱多次标准加入法测定有机试剂中微量水的含量,比单次标准另入法准确度高,其回收率在９９％～１０１％之间。     

Effects of low-energy impact and thermal cycling loadings on fatigue behavior of the quasi-isotropic carbon/epoxy composites

Effects of low-energy impact loading and thermal cycling on fatigue behavior of carbon fiber reinforced epoxy (carbon/epoxy) laminates are examined. A low-energy of 0.62 Joules was adopted to impact carbon/epoxy laminates prior to thermal cycling exposure and fatigue test. The temperature ranged between 60 and −60 °C for thermal cycling and the stress ratio of 0.1 with a frequency of 3 Hz for fatigue loading were used. Impact performances were tested on the virgin specimens and the thermal-cycling exposure specimens. Residual tensile strength and fatigue tests were performed on the laminate composites after being subjected to thermal cycling. The relationship between tensile strength reduction and fatigue performance after thermal cycling was investigated. Stiffness degradation during fatigue testing was monitored; the differences in stiffness for these three composites (virgin specimens, low-energy impacted specimens, low-energy impacted and thermal-cycling exposure specimens) were compared and the coupling effects of low-energy impact and thermal fatigue were studied. Furthermore, the S-N curves were also plotted and the variation was compared on the aforementioned three composites. SEM was used to examine the difference in fracture morphologies on the composites with and without suffering low-energy impact and thermal fatigue.     

返滴定法测定硬质合金中的铁、镍和钴

利用运滴定法消除镍对二甲酚橙指示剂的封闭作用,在pH5．5～6．0先测得铁、镍和钴的总量,再利用镍、钴在强碱性溶液中有效稳定常数不同及铁可波三乙醇胺掩蔽的特性,用钙盐返滴定法测得镍和钴分量．此方法不需分离,简便、快速,应用于含镍、铁和钴的硬质合金中铁、镍和钴的测定,结果令人满意．     

油井管温矫工艺的实验研究

对P110油井钢管温矫后的尺寸及残余应力进行了测试、对比和分析,初步探讨了温矫工艺对P110油井钢管压溃性能的影响。研究结果表明,在现有温矫工艺下,经过一次温矫直,平均可以消除0．64％的不圆度,再经过一次冷矫直,平均又可以消除0．04％的不圆度;温矫后钢管管体的表面切向残余应力以拉应力为主,轴向残余应力为拉压组合应力,且分布极不均匀。