离子色谱法测水泥浆混合水中氯离子含量

本文采用离子色谱仪,建立了一种准确测定水泥浆混合水中氯离子含量的测定方法。样品的前处理条件是:在碱性介质中高温焙烧法除去样品中带色有机物,以消除其对色谱柱的污染和对分析数据准确度的干扰,再用热水浸取灰化物,经过滤、定容后制备成待测溶液。最后采用离子色谱法测定水泥浆混合水中氯离子含量。在最佳实验条件下,方法的检出限为0.01mg/L,在1.0~40.0mg/L浓度范围内具有良好的线性关系,相关系数为r2=0.9993。加标回收率均在98%~100%,相对标准偏差(RSD)是1.5~2.5%(n=6)。经实验表明,本方法能较准确地测定水泥浆混合水中氯离子含量。     

长垣东部葡萄花油层动用状况及剩余油分布特点

长垣东部葡萄花油层为低水位期的河流三角洲沉积,属低孔低渗油层,经过多年的注水开发后,产量进入递减期,针对这种形势研究注水开发过程中油层动用特点显得尤其重要。本文利用检查井资料,真实了解油层水淹规律,认识和掌握在不同开发阶段、不同含水阶段的油层水淹特征,搞清了油层动用状况和剩余油分布特征,从宏观上定量地评价了东部葡萄花油层剩余油的分布,使油田能从整体上把握挖潜剩余潜力的方向,使开发决策有的放矢,为油田开发方案设计、井网调整和部署加密井提供科学依据。     

改进型Ge浓缩技术制备SGOI及其机理

对Ge浓缩技术进行改进,通过对Si/SiGe/Si三明治结构氧化退火,成功制备了Ge含量高达18%的SGOI材料.实验结果表明:顶层的Si可以有效抑制SiGe层氧化初期Ge元素的损失,退火过程有助于Ge元素在SiGe层中的均匀分布,同时也减轻了Ge元素在氧化层下的聚集.在高温条件(1150℃)下制备的SGOI材料应力完全释放,几乎没有引入位错.     

钻井液用页岩防塌剂中磺化度测定方法的改进

磺化沥青中磺酸钠基含量为衡量其质量好坏的重要指标,其含量越高,性能越好。采用离子色谱与元素分析仪相结合,建立了1种快捷地测定磺化沥青中磺酸钠基含量的方法。此方法测定每个样品结果的相对标准偏差（RSD）均小于1%（n=5）,表明该方法具有良好重复性。经实验表明,此方法简单快速可靠,可便捷地应用于磺化沥青中磺酸钠基含量的测定。      

离子色谱法测定黄原胶中丙酮酸含量

采用离子色谱仪,建立了一种快捷测定黄原胶中丙酮酸含量的方法。以20 mmol/L KOH溶液为淋洗液,AS19分离柱(250 mm×4 mm)分离,电导检测器检测,柱温和检测器温度为30℃,进样量为10μL,流速为1.0 mL/min,峰面积定量。丙酮酸的检出限为0.01 mg/L,在2~15 mg/L范围内具有良好的线性关系(R2=0.999 6),加标回收率均在96%以上,相对标准偏差(RSD)为1.0%~1.2%。经实验表明,此方法简单、快速,可便捷地应用于黄原胶样品中丙酮酸含量的测定。     

软抛光垫条件下非晶态Ge2Sb2Te5的化学机械抛光

Chemical mechanical planarization（CMP） of amorphous Ge₂Sb₂Te₅（a-GST） is investigated using two typical soft pads（politex REG and AT） in acidic slurry.After CMP,it is found that the removal rate（RR） of a-GST increases with an increase of runs number for both pads.However,it achieves the higher RR and better surface quality of a-GST for an AT pad.The in-situ sheet resistance（R_s） measure shows the higher R_s of a-GST polishing can be gained after CMP using both pads and the high R_s is beneficial to lower the reset current for the PCM cells. In order to find the root cause of the different RR of a-GST polishing with different pads,the surface morphology and characteristics of both new and used pads are analyzed,it shows that the AT pad has smaller porosity size and more pore counts than that of the REG pad,and thus the AT pad can transport more fresh slurry to the reaction interface between the pad and a-GST,which results in the high RR of a-GST due to enhanced chemical reaction.     

大庆外围油田萨葡油层加密井井位优选方法

针对大庆外围油田萨葡油层砂体分布零散,现井网水驱控制程度低,开发中后期剩余油分布零散等问题,在研究不同井网的剩余油分布类型及合理加密方式基础上,深入研究了以精细油藏描述成果为依据,以可调厚度为加密下限,以周围生产井采出程度和含水为参考的井位优选方法.应用这套方法指导大庆外围油田中高含水萨葡油层的加密调整,提高了井网加密效果和经济效益.     

Preparation of Non-spherical Colloidal Silica Nanoparticle and Its Application on Chemical Mechanical Polishing of Sapphire

Non-spherical colloidal silica nanoparticle was prepared by a simple new method, and its particle size distribution and shape morphology were characterized by dynamic light scattering(DLS) and the Focus Ion Beam(FIB) system. This kind of novel colloidal silica particles can be well used in chemical mechanical polishing(CMP) of sapphire wafer surface. And the polishing test proves that non-spherical colloidal silica slurry shows much higher material removal rate(MRR) with higher coefficient of friction(COF) when compared to traditional large spherical colloidal silica slurry with particle size 80 nm by DLS. Besides, sapphire wafer polished by non-spherical abrasive also has a good surface roughness of 0.460 6 nm. Therefore, non-spherical colloidal silica has shown great potential in the CMP field because of its higher MRR and better surface roughness.     

SOI在高压器件中的应用

综述了绝缘层上的硅(SOI)材料在高压器件中的应用,分析了SOI高压器件的不同结构,并对现在最常用的RESURF LDMOS高压器件结构,以及不同器件参数对击穿电压的影响进行了分析和讨论.     

Cu gettering to nanovoids in SOI materials

Silicon-on-insulator (SOI) materials have a number of inherent advantages over bulk silicon substrates owing to their high speed, low power complementary metal-oxide-semiconductor (CMOS) integrated circuits, such as immunity to radiation hardness, high speed, and high tem-perature tolerance [1]. Separation by implantation of oxygen (SIMOX), bonding and etch back (BESOI) and Smart-Cut are the leading technologies for SOI material fabrication. Transitional metal impurities such as Cu, F…