ZrO2—Y2O3：Ce,Fe,Co晶体的发光光谱和电子顺磁共振

本文详细解释先前测量的(YSZ)ZrO_2-Y_2O_3(88:12):CeO_2(0.01,0.3,0.5wt%),Fe:O:0.03wt%+CeO_20.01wt%,CoO(0.1,0.3wt%)晶体γ辐照前后的吸收光谱。以250—310nm激发,测量这些晶体的发光光谱,定性研究不同浓度铈、钻杂质对YSZ色心发光的影响。YSZ在400—600nm色心发光因受到铈、钴杂质再吸收,使它的发光强度减弱。这种现象在γ辐照后变得更为明显。为了证实掺杂YSZ缺陷结构存在和杂质离子价态,测量了这些晶体辐照前后的电子顺磁共振。由单电荷(Y_((zr),V_n)′自由自旋和Fe~(3+)离子的ESR信号变化,反推铈、钻杂质在YSZ晶体中的价态变化。并和吸收光谱加以比较。     

"Attachment style and relationship satisfaction: Test of a self-disclosure explanation": Erratum.

Reports an error in "Attachment style and relationship satisfaction: Test of a self-disclosure explanation" by J. Patrick R. Keelan, Karen K. Dion and Kenneth L. Dion (Canadian Journal of Behavioural Science/Revue canadienne des sciences du comportement, 1998[Jan], Vol 30[1], 24-35). Some figures were inadvertently omitted in two tables. The correct tables are provided in the erratum. (The following abstract of the original article appeared in record 1998-01141-003.) Explored a self-disclosure explanation for why those with a secure attachment style report greater relationship satisfaction than those with insecure attachment styles. Ss were 99 17–36 yr old students who were in ongoing relationships and who had different attachment styles. Ss were compared in terms of the self-disclosures they directed toward their partner vs a stranger, using questionnaire and behavioural measures. Behavioural self-disclosure was assessed by having Ss give talks on different topics, while anticipating that either their current partner or an opposite-sex stranger would later hear it. Results show that Ss with a secure attachment style disclosed more intimately to their partners than to strangers; whereas those with insecure attachment styles did not. Moreover, secures disclosed more personal facts to their partners than to strangers and were also perceived as more comfortable while self-disclosing to partners than to strangers. Finally, support for the hypothesis that self-disclosure mediates the relation between attachment style and relationship satisfaction was found on one component of self-disclosure, facilitative disclosure, a component which included both reported self-disclosure to one's partner and self-rated ability to elicit disclosure from others. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Investigation of Co/SiC interface reaction

Interface reaction, phase transition, and composition were investigated for Co thin films on amorphous SiC films as a function of heat treatment (600～1000°C). Amorphous SiC layers were grown on (001) Si substrate by magnetron sputter deposition. The SiC layers had a 1:1 stoichiometric ratio of Si to C and an amorphous structure containing microcrystals. The interface reaction between a sputter-deposited Co (250Å thick) and amorphous SiC (2000Å thick) layer on a (001) Si substrate induced by vacuum annealing at temperatures of 600–1000°C was examined. Co₂Si was formed at 700°C as the first crystalline phase and CoSi at 800°C as the final stable phase of the Co/SiC interface reaction. This phase sequence of Co₂Si→CoSi was interpreted in terms of the effective heat of formation and the calculated ternary Co-Si-C phase diagram, and it was consistent with the experimental results. The high formation temperature of the first crystalline Co₂Si phase and no formation of a final stable CoSi₂ phase are discussed in comparison with Co/Si interface reaction and related to the binding energy of the reacting materials. In addition, the behavior of free carbon remaining after the Co/SiC reaction was investigated. This free carbon moved to the top of the reacted cobalt silicide/SiC layer.     

Oxidative coupling of methane in a mixed-conducting perovskite membrane reactor

Ionic-electronic mixed-conducting perovskite-type oxide La_0.6Sr_0.4Co_0.8Fe_0.2O₃ was applied as a dense membrane for oxygen supply in a reactor for methane coupling. The oxygen permeation properties were studied in the p_O2-range of 10⁻³−1 bar at 1073–1273 K, using helium as a sweeping gas at the permeate side of the membrane. The oxygen semi-permeability has a value close to 1 mmol m⁻² s⁻¹ at 1173 K with a corresponding activation energy of 130–140 kJ/mol. The oxygen flux is limited by a surface process at the permeate side of the membrane. It was found that the oxygen flux is only slightly enhanced if methane is admixed with helium. Methane is converted to ethane and ethene with selectivities up to 70%, albeit that conversions are low, typically 1–3% at 1073–1173 K. When oxygen was admixed with methane rather than supplied through the membrane, selectivities obtained were found to be in the range 30–35%. Segregation of strontium was found at both sides of the membrane, being seriously affected by the presence of an oxygen pressure gradient across it. The importance of a surface limited oxygen flux for application of perovskite membranes for methane coupling is emphasized.     

氧对95W-3.15Ni-1.35Fe-0.5Co合金组织及力学性能的影响

研究了氧对95W-3．15Ni-1．35Fe-0．5Co合金组织及力学性能的影响。结果表明：氧主要偏聚于钨合金的钨晶粒边缘和残留孔隙表面，氧偏聚的地方容易形成孔洞；氧的存在影响了Fe、Ni、Co在粘结相中的原子扩散和烧结动力；采用氢气预烧脱氧，可以提高钨合金的力学性能。     

对接焊缝检验中60Co源替代192Ir源的可行性试验

本文描述了大亚湾核电站稳压器上封头与筒全对接环焊缝线检验中存在的问题及产生的原因，对可能的解决方法进行了分析和评价，认为使用６０Ｃｏ源替代１９２Ｉｒ源是合理的解决透照时间和底片黑度问题的办法。通过实验室和稳压器实体上的对比试验，证明了方法的可行性。同时对增感屏，冲片条件等因素对底片质量和照相灵敏度的影响做出了定量的评价。     

The interactions between nitrogen dose,year and stage of ripeness on nitrogen and trace element concentrations and seed‐borne pathogens in organic and conventional wheat

The effects of N dose and stage of ripeness on Fe, Co, Cr, Ni, Se and N concentration and incidence of fungal diseases were measured in winter wheat grain from conventional (CONV) and organic (ORG) systems on neighbouring areas of a 10‐year‐old manure‐based farm. Principal components analysis (PCA) of the data showed that year had the greatest influence on the results, but that cropping system affected N, Ni, Fe and Se content and incidence of diseases. Attack by Dreschlera tritici‐repentis was highest in ORG and attack by Stagonospora nodorum in CONV. Increasing stage of maturity increased incidence of fungal disease and Fe content. Analysis of variance and MANOVA showed that wheat yield was affected by weather (precipitation and temperature), cropping system and N dose. The 10% lower yield in ORG than CONV was explained by a lower amount of plant available N at the same N dose. Nitrogen, Fe, Ni, Se and Co contents in grain were affected by year, while dry matter content was significantly lower in ORG than in CONV. The MANOVA identified correlations between Co and Fe, Ni and Se. Incidence of fungal diseases was foremost affected by weather, stage of ripeness and N dose. Organic cropping increased Fe and Se uptake and decreased S. nodorum attack, but increased attack by D. tritici‐repentis. Copyright © 2006 Society of Chemical Industry     

永久磁体新材料和新工艺

扼要地介绍了在较低温度下制造永久磁体的机械合金化新技术，并对一些永久磁体新材料的主要性能进行了对比阐述。     

Co相变的X射线衍射研究

用高温Ｘ射线衍时（ＸＲＤ）方法研究纯Ｃｏ相变的动态行为．结果表明：４２５℃以上它以ｆｃｃ（β─Ｃｏ）形式存在，在无应变条件下大部分β─Ｃｏ可以保持至室温，常温下研磨，则β─Ｃｏ将转变成ｈｃｐ结构的α─Ｃｏ，说明在β─Ｃｏ向α─Ｃｏ相变的过程中，应力是重要的诱发因素．