Cu、Ni、Zn、Mn系弹性合金形变热处理的研究

研究了微量元素及形变热处理工艺对Cu－15Ni－13Mn－28Zn弹性合金微双相化的影响。结果表明;冷变形量增加,可缩短微双相化时间;添加微量元素①0．187Al＋0．013Ce＋0．24Fe＋0．1B＋0．1Ti＋0．1Zr,②0．5Ti可缩短微双相化时间;在时效过程中,α相点阵常数初期随时间延长而下降,微及相化完成后则随时间延长而上升。     

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岩石物理参数是地震反射特征分析的基础。经过提取莺歌海盆地１１口探井的纯泥、纯砂及气层的测井信息进行了统计分析及模型实验,并结合实际钻井、地震资料分析表明,本区在２５００ｍ以浅的含气砂岩莽莽人地震纵波速度比围岩（泥岩）低３０％以上。这类含气砂岩的顶界在地震剖面上表面为强振幅异常（亮点）;在ＣＤＰ道集上表现出振幅随偏移距的增大而增强的第三类ＡＮＯ异常特征;在相对波阻抗剖面上反映出相对低阻抗的特点。预探     

光电动态检测系统砷化镓合金光源特性研究

本文给出光电动态检测系统的最近发展,特别对该检测系统采用的砷化镓合金光源特性进行了实验研究。给出精于纳秒量级的时间响应和较好的光谱特性,对光源的发光效率和光强－驱动电压关系作了研究。对光凶器件作了实际的光电动态检测,并检验了新发现的“Ｓｉ／Ｇｅ异结并接效应”＾［１］。     

电感耦合等离子体质谱法测定牛初乳粉中痕量硒的干扰探讨

目的 分析样品基体给检测结果造成的增敏效应影响,建立一种能消除待测样品中基体的干扰,从而准确测定痕量硒的电感耦合等离子体质谱的检测方法。方法 样品经硝酸消解后, 采用标准加入法,标准溶液加入的体积不大于待测液体积2%的前提下,在氦气模式下以元素特定质量数定性,以待测元素质谱信号与内标元素质谱信号的强度比与待测元素的浓度成正比进行定量分析。结果 样品基底对硒有增敏效果采用标准加入法能很好消除样品基底干扰,检测5种标准物质的硒含量均在标示值范围内。工作曲线相关系数达到0.998,精密度试验的相对标准偏差为3.2%。结论 该方法相对外标法能更准确对痕量硒进行定量,适合测定基底复杂存在干扰的样品,对相同或相近的样品可以共用相同工作曲线测定硒含量。     

天然气中微量元素捕集检测技术初探及应用

目前有关天然气中微量元素分布研究仍处于探索阶段,相关检测技术研究匮乏。国内研究仅局限于王多义教授引进的地气测量法,但并未对硝酸捕集剂进行优选。在对不同浓度硝酸捕集剂进行优选的基础上,对天然气微量元素检测进行初步探索。通过相关实验发现:低浓度硝酸捕集剂对微量元素的捕集效果理想,其中又以15%硝酸效果最佳;现场多级捕集实验同室内小气量循环捕集实验对比,室内实验检测值更高,更接近天然气中微量元素实际值;不同地区天然气微量元素的检测对比,验证了前人有关天然气中微量元素的部分结论。但实验相关作用机理不明,微量元素的精确定量有待形成标准。其应用前景广泛,对天然气运移路径的判定、天然气藏的判寻及物探方面都具十分重要的意义。     

喇嘛苏铜矿区中酸性岩体微量元素特征及其成因分析

根据喇嘛苏铜矿中酸性岩体新鲜样品的微量元素含量测试结果,岩体中Ni的平均含量接近于维氏值,而Ti、Cr、V则低于维氏值;高场强元素含量为（611.25~1 210.11）×10^-6,平均值为1 031.211×10^-6;大离子亲石元素含量为（1 041.05~2 708.61）×10^-6,平均值为1 845.15×10^-6;Rb、Ba、K、La、Sm和Th的含量较高,Ta、Nb、Ti较低,而且Th含量远远大于Ta含量;在花岗岩类岩石的非活动性元素构造环境判别图上,所有的样品点均落入火山弧花岗岩区域内,说明本区花岗岩类岩石为造山带的I型花岗岩,属正常的钙碱性大陆边缘弧花岗岩类岩石,是产于消减带而来自壳源的火成岩,在其形成过程中有可能有洋壳物质和流体的加入,同时也混染了围岩。     

Trace mineral content of conventional,organic and courtyard eggs analysed by inductively coupled plasma mass spectrometry (ICP-MS)

We investigated the contents in yolk and albumen of the trace minerals Se, Zn, Mn, Co, Cu, Mo, V, Cr, Ni, Tl, As and Cd in eggs from hens from three husbandry systems by ICP-MS. Conventional hens were given a commercial feed with added minerals, organic hens were given a feed based on organic feedstuffs also with added minerals, and courtyard hens were fed on cereals, legumes, grass and swill. Dietary Se, Zn, Mn, Co and Cu concentrations were lower in courtyard compared to conventional and organic diets; Cr concentration was highest in courtyard compared to organic diet. Trace element contents in yolks were higher than those in albumen. The highest content of Se in yolks was in organic, followed by conventional eggs. Zn contents were highest in courtyard yolk, followed by conventional, which in turn was higher than organic. Mn yolk contents were lowest in courtyard eggs; Cr contents were highest in courtyard eggs. The differences in albumen were in Zn and Cr values, which were highest in courtyard eggs. Τhe results provide baseline measurements of trace mineral contents of eggs and suggest measurable differences amongst eggs from hens in different husbandry systems; the physiological significance of these differences are discussed.     

Comparative study of trace elements in certain fish, meat and meat products

Selenium, copper, nickel, zinc, cadmium, manganese, iron, copper and lead contents of certain fish, meat and meat products consumed in Turkey were determined using inductively coupled plasma-optical emission spectrometry (ICP-OES). The order of the elements in the meat, meat products and fish samples and their concentration ranges in μg 100 g⁻¹ was Fe (57.7–156.4) > Zn (20–159) > Ni (8.2–24) > Pb (11.5–13.5) > Cr (8.44–9.51) > Cu (7.18–10.01) > Cd (0.77–1.04) > Mn (3.98–10) > Se (1.32–4.6). The elemental concentrations of fish studied seemed to be close to the international standards. The highest trace element concentrations were obtained from past?rma, meat and sausage while the lowest value was observed in Trachurus trachurus (saurel). Iron concentrations in all samples were higher than the recommended values.     

砂型单体合金活塞环铸造缩松缺陷分析研究

本文研究和分析了单体舍金活塞环铸造产生缩松的原因,并提出了合理的解决措施。研究表明,生铁的遗传性、原材料中的微量元素（如Te,As等）及集流包包颈处热节对活塞环的缩松产生较大的影响。其解决措施是,在钒钛生铁中加入一定比例的本溪生铁（30％-40％）,消弱生铁遗传性影响。另外加入稀土中和有害元素的影响,并在工艺上采取相应的改进措施。同时本文也讨论了单体活塞环铸造的凝固特点,并分析了生铁遗传性影响以及借助质谱分析和俄歇分析结果,探讨了合金中加入稀土的作用。     

XTR三元素等价现象的消除

通过运用循环群和置换的性质,进一步探讨了三元素等价现象的特性,提出了消除三元素等价现象的方法,并总结概括各方法的效果;提出了一种改进方案,分析了该方案的计算复杂度、通信开销和安全性;改进方案简单有效地提高了XTR的安全强度。